[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP1370338A4 - Compositions of insoluble magnesium containing minerals for use in fluid filtration - Google Patents

Compositions of insoluble magnesium containing minerals for use in fluid filtration

Info

Publication number
EP1370338A4
EP1370338A4 EP02736485A EP02736485A EP1370338A4 EP 1370338 A4 EP1370338 A4 EP 1370338A4 EP 02736485 A EP02736485 A EP 02736485A EP 02736485 A EP02736485 A EP 02736485A EP 1370338 A4 EP1370338 A4 EP 1370338A4
Authority
EP
European Patent Office
Prior art keywords
purification material
purification
magnesium
fluid
binder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02736485A
Other languages
German (de)
French (fr)
Other versions
EP1370338A2 (en
Inventor
Kenneth D Hughes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Watervisions International Inc
Original Assignee
Watervisions International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Watervisions International Inc filed Critical Watervisions International Inc
Publication of EP1370338A2 publication Critical patent/EP1370338A2/en
Publication of EP1370338A4 publication Critical patent/EP1370338A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/02—Loose filtering material, e.g. loose fibres
    • B01D39/06—Inorganic material, e.g. asbestos fibres, glass beads or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28042—Shaped bodies; Monolithic structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
    • B01D39/2079—Other inorganic materials, e.g. ceramics the material being particulate or granular otherwise bonded, e.g. by resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2082—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous
    • B01D39/2089—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous otherwise bonded, e.g. by resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/64—Heavy metals or compounds thereof, e.g. mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041—Oxides or hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/048—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing phosphorus, e.g. phosphates, apatites, hydroxyapatites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28023—Fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28026—Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/018—Granulation; Incorporation of ion-exchangers in a matrix; Mixing with inert materials
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/40—Porous blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/42—Materials comprising a mixture of inorganic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/46—Materials comprising a mixture of inorganic and organic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4843—Algae, aquatic plants or sea vegetals, e.g. seeweeds, eelgrass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/50—Aspects relating to the use of sorbent or filter aid materials
    • B01J2220/68—Superabsorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/42—Nature of the water, waste water, sewage or sludge to be treated from bathing facilities, e.g. swimming pools
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

Definitions

  • This invention relates generally to the field of solution and fluid filters c purification devices, primarily to aqueous solution filters and water purification, devices for gases and water and other aqueous liquids, which remove contaminants from the gas or aqueous liquid solution passed through them.
  • the invention relates to the field of such devices that remove chemical and microbiological contaminants, including heavy metals and pesticides, bacteria and viruses and their components, from water or aqueous solutions.
  • EPA Environmental Protection Agency
  • Common coliforms represented by the bacteria E. coli and Klebsiella terrigena, must show a minimum 6-log reduction, 99.9999% of organisms removed, from an influent concentration of lxl0 7 /100 ml.
  • Common viruses represented by poliovirus 1 (LSc) and rotavirus (Wa or SA-11), which show resistance to many treatment processes, must show a minimum 4 log reduction, 99.99% of organisms removed, from an influent concentration of lxl0 7 /L.
  • Cysts such as those represented by Giardia muris or Giardia lamblia, are widespread, disease- inducing, and resistant to chemical disinfection.
  • Devices that claim cyst removal must show a minimum 3 log reduction, 99.9% of cysts removed, from an influent concentration of lxl0 6 /L or lxl0 7 /L, respectively.
  • the EPA has accepted the use of other particles in the appropriate size range as a means of testing devices that claim this function.
  • Materials that are highly efficient at removing and immobilizing microbial organisms have numerous applications, but a particular area of application is in the biotechnology and fermentation industries. Not only would such materials be useful in the processing of fermentation broth for recycling or reuse, they also would have utility as microbial immobilization materials for the microbes of interest to the fermentation process.
  • magnesium silicates magnesium oxides, magnesium hydroxides and magnesium phosphates in granular or particulate, or in fiber form as a chemical binding agent.
  • Some forms of magnesium silicates are known as asbestos and these materials which can be mined in fiber form have been mixed with cellulose and used for the removal of microorganisms and particulate matter from fluids that will be used for consumption.
  • the application of magnesium silicates in the form of asbestos containing minerals for fluid filtration has decreased dramatically since the materials are known to cause respiratory diseases when inhaled.
  • Magnesium silicates in the form of asbestos fibers have found commercial application as fire retardant materials and materials capable of strengthening concretes and synthetic polymers.
  • Non asbestos forms of magnesium silicates include minerals identified as talc(s) and are used commercially in the pharmaceutical and cosmetic, and paint and coating industries. Aluminum and magnesium containing silicates are also used in these fields.
  • Magnesium containing silicates can be produced through chemical synthesis or obtained through mining/processing of raw ores, which are found globally. Magnesium containing silicates, magnesium oxides, magnesium hydroxides and magnesium phosphates can function as a biological water purification agent through a complex process, which includes the chemical adsorption of chemicals, biological materials and microorganisms.
  • Magnesium silicates are naturally occurring minerals that are commonly found in a mixture of structural forms and with varying concentrations of other metals substituted for the magnesium metal. Magnesium oxides, magnesium hydroxides and phosphates can also be found naturally and produced by synthetic methods.
  • magnesium silicates include metals such as aluminum, titanium, calcium, iron, copper, and many others.
  • Magnesium oxides are generated for use in many products but include water treatment processes.
  • Magnesium phosphates can be used in a range of applications including water treatment.
  • magnesium silicates may be used as filtration materials, especially in fiber form and even more specifically when mixed with cellulose and/or fiberglass fibers.
  • the use of magnesium silicates, specifically asbestos fiber filter sheets, to treat water is discussed in the literature and previously demonstrated by companies like Seitz.
  • Seitz produced asbestos fiber filters for treating water for the beverage industry for many years.
  • magnesium silicates may be used or incorporated in a device that meets the minimum EPA requirements described above.
  • a water treatment process is also disclosed in U.S. Patent No. 4,167,479, which uses an active media made of powdered minerals (less than 50 mesh) and active micro-organisms to purify waste water.
  • the active media is combined with the wastewater and circulated to allow biological and chemical reactions to occur.
  • the minerals in this process are used as granular additives to the water system and are dispersed throughout the fluid, as opposed to being part of a binder material through which the water to be treated would flow.
  • This reference does not provide or suggest a method for removing microorganisms from the wastewater. In fact, it actually uses active microorganisms as part of the treatment, and does not contemplate their removal.
  • the reference specifically emphasizes that the minerals provide metal ions to precipitate phosphates, reducing or eliminating the need to use other types of chemicals, such as alum, for precipitating phosphates.
  • materials in the fields of ceramic and bio-implants are known. These materials, however, are not fabricated for, nor are they capable of passing fluids for the purpose of fluid filtration.
  • magnesium silicates obtained from natural and synthetic materials. It is the intention of this invention and art to use magnesium containing minerals to generate a practical fluid purification and a filtration device and method that permits the safe use of all magnesium silicates, oxides, and phosphates in the forms which are readily available and commonly found or synthesized by a variety of different methods. There is also a need in the art for a method and device that meets the minimum EPA requirements for designation as a microbiological water purifier, such that the device is more than suitable for consumer and industry point-of-use applications.
  • the present inventors have discovered that a significant problem in the known use of some types of magnesium silicate containing filter devices is that the mineral material is dangerous when inhaled and when used as filter sheets open to the atmosphere, fibers of the mineral can be lost and possibly inhaled. These sheets also can be ripped or torn and present a hazard.
  • an additional significant problem in the known magnesium containing minerals incorporating filter devices is that when the magnesium containing minerals are in loose form, whether granular, particulate, or fiber.
  • the effectiveness of filters generated with materials in loose form is compromised by channeling and by-pass effects caused by the pressure of fluid, in particular, water and aqueous solutions, flowing through the filter media as well as particle erosion and aggregation. Because chemicals, viruses and bacteria are removed by intimate contact with the adsorption material, even relatively small channels or pathways in the granular material formed over time by water pressure, water flow, particle erosion, or particle aggregation are easily sufficient to allow passage of undesirable microbiological contaminants through the filter.
  • This invention solves this problem by providing a microbiological filter and method for removing contaminants, including bacteria and viruses, where magnesium containing minerals and other granular adsorptive filter media are fixed within a chemical binder material to form a porous filter material that eliminates the possibility of channeling and active agent by-pass.
  • This invention is in general a device and method for the purification and filtration of aqueous fluids, in particular water (such as drinking water or swimming or bathing water), or other aqueous solutions (such as fermentation broths and solutions used in cell culture), or gases and mixtures of gases such as breathable air, found in clean rooms, hospitals, diving equipment homes, aircraft, or spacecraft, and gases used to sparge, purge, or remove particulate matter from surfaces.
  • the use of the device and method of the invention results in the removal of an extremely high percentage of microbiological contaminants, including bacteria and viruses and components thereof.
  • the use of the device and method of the invention results in purification of water to a level that meets the EPA standards for designation as a microbiological water purifier.
  • the invention relates to a purification material for fluids that contains particulate magnesium containing minerals that is in the form of a porous block as the result of the presence of a binder.
  • magnesium containing minerals is from magnesium silicates, magnesium aluminum silicates, magnesium oxides, magnesium phosphates and / or related magnesium containing minerals, and has been obtained from natural sources, e.g., mining, or from synthetic sources such as the mixing of chemicals containing silicon, magnesium, and aluminum.
  • the binder is a polymeric or oligomeric material that is capable of maintaining the particulate magnesium mineral in a block structure. This allows the purification material to be molded or pressed into any desired shape, e.g., a shape suitable for inclusion into the housing of a filtration device, which provides for fluid inflow and outflow, and which filtration device has one or more chambers for contact of the fluid with the purification material.
  • the polymeric binder In addition to maintaining the magnesium mineral particles immobilized in a unitary block, the polymeric binder also provides desirable physical characteristics to the filter material, e.g., rendering it rigid or flexible, depending upon the type and amount of polymeric binder used.
  • the invention in another embodiment, relates to a purification material for fluids that is in the form of a sheet or membrane, containing the particulate magnesium containing minerals and immobilized with a binder.
  • the invention in another embodiment, relates to a purification material for fluids that is in the form of a block, sheet or membrane, containing the particulate magnesium containing minerals and immobilized with a pressure-technique that uses fluid-swelling materials.
  • the invention also relates to methods of filtering fluids, such as water, aqueous solutions, and gases, to remove a large proportion of one or more types of microorganisms contained therein, by contacting the fluid with the purification material of the invention.
  • this contacting occurs within the device described above, with the unfiltered fluid flowing through an inlet, contacting the purification material in one or more chambers, and the filtered fluid flowing out of the chamber through an outlet.
  • the purification material of the invention can be used to purify drinking water, to purify water used for recreational purposes, such as in swimming pools, hot tubs, and spas, to purify process water, e.g. water used in cooling towers, to purify aqueous solutions, including but not limited to, fermentation broths and cell culture solutions (e.g., for solution recycling in fermentation or other cell culture processes) and aqueous fluids used in surgical procedures for recycle or reuse, and to purify gases and mixtures of gases such as breathable air, for example, air used to ventilate hospital or industrial clean rooms, air used in diving equipment, or air that is recycled, e.g., in airplanes or spacecraft, and gases used to sparge, purge or remove volatile or particulate matter from surfaces, containers, or vessels.
  • the purification material of the invention has the additional advantage of making use of readily available magnesium mineral materials, including those obtained from natural sources, while still maintaining high purification efficiency.
  • the material of the invention namely magnesium containing minerals and optionally other adsorptive materials in a binder matrix and formed into a block or sheet, can be used as an immobilization medium for microorganisms used in biotechnology applications such as fermentation processes and cell culture.
  • biological process fluids such as nutrient, broths, substrate solutions, and the like, are passed through the immobilization material of the invention in a manner that allows the fluids to come into contact with the microorganisms immobilized therein, and effluent removed from the material and further processed as needed.
  • Fig. 1 is a cross-sectional view illustrating a particular embodiment of the invention, namely a water filter housing containing a block filter incorporating magnesium containing minerals and granulated activated charcoal (GAC) in a binder matrix according to the invention.
  • GAC granulated activated charcoal
  • Figs. 2a and 2b are schematic views of a particular embodiment of the invention, namely a filter material containing magnesium containing minerals and a binder matrix in the form of a membrane or sheet.
  • one embodiment of the invention relates to a purification material in the form of a block filter containing granulated magnesium containing minerals in a binder, which is typically a polymeric material.
  • the invention relates to a rigid block filter that contains a mixture of granulated magnesium minerals and magnesium-aluminum derivatives and granulated activated charcoal (GAC) or bone char or other adsorptive filter media in a binder material, such as a thermoplastic material, such that the magnesium containing minerals and derivatives and GAC are fixed within the binder matrix, and that channeling from flow during water treatment cannot occur.
  • the purification material of the invention can be produced by extrusion, molding including injection molding, or by compression methods.
  • Fibrillation may also be used to prepare fibrils of the mixture of binder polymer and magnesium minerals that can then be formed into a sheet, film, or block. It may be produced in any shape or size and may be rigid or flexible. Pressure techniques which use fluid swelling materials may also be used to prepare the mixture of binder and magnesium minerals that can then be formed into a sheet, film, or block. It may be produced in any shape or size and may be rigid or flexible.
  • the pore size of the filter block influences flow rates of the fluid through the filter, and is a function of the size of the granular particles incorporated into the filter block.
  • block does not denote any particular geometrical shape, but rather that the material is not a sheet or membrane.
  • Nonlimiting examples of “blocks” as this term is intended to be used include tubes, annular rings, as well as more conventional geometrical solids. Material formed into flexible blocks is particularly suitable for use in pipes or tubes that serve as the fluid filter medium.
  • the purification material of the invention may be formed into any desired shape, and thus provides ease of handling and use.
  • the purification material may be formed into a monolith or block that fits into conventional housings for filtration media or it can be shaped to provide purification as part of a portable or personal filtration system.
  • the material may be formed into several different pieces, through which water flows in series or in parallel. Sheets or membranes of the purification material may also be formed.
  • the rigidity of the purification material, whether in block form or in sheet/membrane form, may be altered through inclusion of flexible polymers in the binder material.
  • the purification material of the invention achieves its unusually high efficiency in removing microorganisms from fluids partly as the result of the immobilization of the magnesium mineral particles in the binder, and the necessity for fluid flowing through the purification material to follow an extended and tortuous path therethrough, instead of forming channels through the purification material as occurs in prior magnesium mineral-containing purification materials.
  • This path ensures that the fluid contacts a larger proportion of the surface area of the magnesium mineral particles, and it prevents sustained laminar flow of the fluid through the filtration material. This latter effect is believed to help prevent laminae of fluid containing microorganisms from avoiding sustained contact with magnesium-mineral particles in the filter.
  • the magnesium mineral used is in the form of magnesium silicate, and the GAC material are present in approximately equal amounts, with the percentage of binder material kept to a minimum.
  • the magnesium mineral used in the invention may be obtained from other natural or synthetic/industrial sources and mixtures of the different derivatives can provide differences in the properties of the purification material.
  • adding sodium to the filter block can increase the sodium concentration in the effluent water if water is used as the fluid. This can be useful in, e.g. purifying hard water in such a way as to maintain desirable water hardness levels therein.
  • Sodium in the filter material may be obtained either by inclusion of sodium containing magnesium minerals, inclusion of sodium salts and compounds, or by preconditioning the purification material by passing sodium-containing solutions therethrough.
  • the binding of metal ions, radioactive isotopes, and microorganisms can also be increased.
  • exposure to increased temperatures allows conversion between crystalline and amorphous forms.
  • exposure to metals in a synthesis procedure allows replacement of some of the magnesium ions in both crystalline and amorphous forms.
  • the purification material is constructed to withstand sterilization.
  • Sterilization processes include thermal processes, such as steam sterilization or other processes wherein the purification material is exposed to elevated temperatures or pressures or both, resistive heating, radiation sterilization wherein the purification material is exposed to elevated radiation levels, including processes using ultraviolet, infrared, microwave, and ionizing radiation, and chemical sterilization, wherein the purification material is exposed to elevated levels of oxidants or reductants or other chemical species, and which is performed with chemicals such as halogens, reactive oxygen species, formaldehyde, surfactants, metals and gases such as ethylene oxide, methyl bromide, beta-propiolactone, and propylene oxide.
  • sterilization may be accomplished with electrochemical methods by direct oxidation or reduction with microbiological components or indirectly through the electrochemical generation of oxidative or reductive chemical species. Combinations of these processes are also used on a routine basis. It should also be understood that sterilization processes may be used on a continuous or sporadic basis while the purification material is in use.
  • the invention comprises a device and a method for the filtration and purification of a fluid, in particular an aqueous solution or water, to remove organic and inorganic elements and compounds present in the water as particulate material.
  • the device and method can be used to remove chemical and microbiological contaminants, including bacteria and viruses and components thereof, from water or other fluids or gasses destined for consumption or other use by humans or other animals.
  • the method and device of the invention are particularly useful in these applications where the reduction in concentration of microbiological contaminants made possible by the invention meets the EPA standards for microbiological water purification devices, and also exceeds the effectiveness of other l ⁇ iown filtration and purification devices incorporating granulated adsorption media that contain magnesium minerals, such as those obtained from magnesium silicate and magnesium-aluminum silicates.
  • the purification material is a porous block formed by granulated or particulate magnesium minerals, which is defined herein to include magnesium silicates, magnesium aluminum silicates, magnesium oxides, and magnesium phosphates and other optional adsorptive granular materials, described in more detail below, such as granulated activated charcoal (GAC), retained within a polymer binder matrix.
  • GAC granulated activated charcoal
  • the purification material is composed of a mixture of magnesium minerals and an adsorptive granular filter media, for example GAC
  • the purification material can also be formed with spatially distinct gradients or separated layers.
  • magnesium minerals and GAC granules may be immobilized in separate layers using a solid binder matrix, for instance, a polymer thermoplastic such as polyethylene or the like, so that movement of the magnesium minerals and GAC particles is precluded and detrimental channeling effects during fluid transport through the block are prevented. If the components reside in separate locations, the fluid flow is sequential through these locations.
  • magnesium silicates originates from magnesium silicates, magnesium aluminum silicates, magnesium oxides, magnesium phosphates and mixtures thereof.
  • suitable materials are those designated as magnesium silicates and sold by R.T. Vanderbilt Company and as magnesium oxides and magnesium hydroxide which is sold by Martin Marietta Specialty Chemical.
  • the material may be ground to a desirable particle size, e.g., 80-325 mesh or smaller.
  • a typical analysis of these materials shows 50% or greater and 99% or greater magnesium silicate, magnesium oxide and magnesium hydroxide respectively.
  • the element binding characteristics of these materials have been reported by producers of these raw materials.
  • the organic molecule binding capabilities have also been reported by producers of these raw materials.
  • the magnesium containing minerals magnesium silicates, magnesium aluminum silicates, magnesium oxides, magnesium hydroxides, and magnesium phosphates, etc.
  • the GAC are mixed in approximately equal amounts with the minimal amount of binder material necessary to compose a monolithic purification material.
  • concentrations of magnesium minerals, GAC, and binder are substantially variable, and materials having different concentrations of these materials may be utilized in a similar fashion without the need for any undue experimentation by those of skill in the art.
  • GAC, or bone char apatite containing
  • its concentration in the mixture is generally less than 50 % by weight, based upon the weight of the composition before any drying or compacting.
  • adsorbents other than GAC may be substituted completely for, or mixed with, the GAC in a multicomponent mixture.
  • these adsorbents include various ion-binding materials, such as synthetic ion exchange resins, zeolites (synthetic or naturally occurring), diatomaceous earth, bone char and apatite minerals, calcium silicate materials and one or more other phosphate-containing materials, such as minerals of the phosphate class, in particular, minerals containing magnesium and silicate described herein.
  • minerals of the silicate class, and containing magnesium are particularly suitable for the invention. These materials may also contain iron, aluminum, and calcium. These materials may be calcined and processed by a number of methods to yield mixtures of varying compositions.
  • Minerals containing magnesium are found in the hydroxide and oxide class and include magnesium oxides and hydroxides.
  • Magnesium oxide is known as periclase and is industrially important.
  • Brucite is an important mineral containing magnesium which is found associated with many magnesium containing minerals such as those in the serpentine group.
  • the serpentine group includes antigorite, clinochrysotile, lizardite, orthochrysotile, and parachrysotile.
  • Talc is similar to brucite in that it is found associated with many different minerals. It is a common form of magnesium silicate and particularly suitable for the invention.
  • Minerals containing phosphate and magnesium are particularly suitable for the invention. These minerals are commonly associated with other elements such as calcium, iron, and aluminum and belong to the apatite and phosphate class of minerals.
  • Minerals containing silicate and magnesium are many and yield particulate matter that is particularly suitable for the invention.
  • the general formula for mica is AB 2 . 3 (Al, Si)Si 3 O 10 (F, OH) 2 .
  • the A is usually potassium, K, but can be calcium, Ca, or sodium, Na, or barium, Ba, or some other elements in the rarer micas.
  • the B in most micas can be aluminum, Al, and/or lithium, Li, and/or iron, Fe, and/or magnesium, Mg.
  • the mica group has many members. Examples of common mica minerals include, but are not limited to, Biotite, Fuchsite, Lepidolite, Muscovite, Phlogopite, and Zinnwaldite.
  • Garnets are also examples of minerals that can be used with this invention.
  • the general formula for garnets is A 3 B 2 (Si0 4 ) 3 .
  • the A represents divalent metals such as calcium, iron, magnesium and manganese.
  • the B represents a trivalent metal such as aluminum, chromium, iron, and other elements found in rarer members of the group.
  • the garnet is a large group of which examples include, but are not limited to, almandine, andradite, grossular, pyrope, spessartine, and uvarovite.
  • the montmorillonite/smectite group is composed of several minerals including pyrophyllite, talc, vermiculite, sauconite, saponite, nontronite and montmorillonite differing mostly in chemical content.
  • the general formula is (Ca, Na, H)(A1, Mg, Fe, Zn) 2 (Si, Al) 4 O 10 (OH) 2 - xH 2 0, where x represents the variable amount of water that members of this group could contain.
  • the chlorite group is a large and common group of minerals and can be used in the present invention.
  • the general formula is X 4 - 6 Y 4 O 10 (OH, 0) 8 .
  • the X represents either aluminum, iron, lithium, magnesium, manganese, nickel, zinc or rarely chromium.
  • the Y represents either aluminum, silicon, boron or iron but mostly aluminum and silicon.
  • Examples include, but are not limited to, Amesite (Mg, Fe) 4 Al 4 Si 2 O 10 (OH) 8 , Baileychlore (Zn, Fe +2 , Al, Mg) 6 (Al, Si) 4 O 10 (O, OH) 8 ,Chamosite (Fe, Mg) 3 Fe 3 AlSi 3 O 10 (OH) 8 , Clinochlore (kaemmererite) (Fe,
  • Additional exemplary minerals include the following: Periclase MgO; IMA98.065 Mg 9 [Si 4 0 16 ](OH) 2 ; Brucite Mg(OH) 2 ; Sellaite MgF 2 ; Kotoite Mg 3 B 2 0 6 ; Norbergite Mg 3 (Si0 4 )(F,OH) 2 ; Forsterite Mg2Si04; Ringwoodite Mg2Si04; IMA96.034 Mg7(P04)2(OH)8; Suanite Mg2B205; Wightmanite Mg5(B03)0(OH)5-2(H20); Pokrovskite Mg2(CO3)(OH)2-0.5(H2O); Fluoborite Mg3(B03)(F,OH)3; Holtedahlite Mgl2(P030H,C03)(P04)5(OH,0)6; Titanclinohumite Mg8Ti(Si04)402;
  • Ca7Mg(Si04)4 Maufite (Mg,Ni)A14Si3013-4(H20); Osumilite-(Mg) (K,Na)(Mg,Fe++)2(Al,Fe+++)3(Si,Al)12O30; Ferri-annite K(Fe++,Mg)3(Fe+++,Al)Si3O10(OH)2 Hummerite KMgV+++++5014-8(H20) Kutnohorite Ca(Mn,Mg,Fe++)(C03)2; Ankerite Ca(Fe++,Mg,Mn)(C03)2 Austinite (Mn,Mg)9Fe+++3(P04)8(OH)3-9(H20); Triplite (Mn,Fe++,Mg,Ca)2(P04)(F,OH) Vesuvianite Cal 0Mg2A14(SiO4)5(Si2O7)2(
  • minerals mined and packaged to meet federal regulations for consumer products including ((Mg,Al) 2 Si 4 O 10 (OH) 2 ), Mg 3 Si 4 O 10 (OH) 2 ) are exemplary.
  • polymeric materials used for ion-binding including derivatised resins of styrene and divinylbenzene, and methacrylate may be used.
  • the derivatives include functionalized polymers having anion binding sites based on quaternary amines, primary and secondary amines, aminopropyl, diethylaminoethyl, and diethylaminopropyl substituents.
  • Derivatives including cation binding sites include polymers functionalized with sulfonic acid, benzenesulfonic acid, propylsulfonic acid, phosphonic acid, and/or carboxylic acid moieties.
  • Natural or synthetic zeolites may also be used or included as ion-binding materials, including, e.g., naturally occurring aluminosilicates such as clinoptilolite and calcium silicates such as wollastonite.
  • Suitable binder materials include any polymeric material capable of aggregating the particulate materials together and maintaining this aggregation under the conditions of use. They are generally included in amounts ranging from about 10 wt% to about 99.9 wt%, more particularly from about 15 wt% to about 50 wt%, based upon the total weight of the purification material.
  • Suitable polymeric materials include both naturally occurring and synthetic polymers, as well as synthetic modifications of naturally occurring polymers.
  • the polymeric binder materials generally include one or more thermoset, thermoplastic, elastomer, or a combination thereof, depending upon the desired mechanical properties of the resulting purification material.
  • polymers melting between about 50°C and about 500°C, more particularly, between about 75°C and about 350°C, even more particularly between about 80°C and about 200°C are suitable polymeric binders for the invention.
  • polyolefms melting in the range from about 85°C to about 180°C polyamides melting in the range from about 200°C to about 300°C
  • fluorinated polymers melting in the range from about 300°C to about 400°C can be particularly mentioned as suitable.
  • types of polymers suitable for use as binders in the invention include, but are not limited to, thermoplastics, polyethylene glycols or derivatives thereof, polyvinyl alcohols, polyvinylacetates, and polylactic acids.
  • thermoplastics include, but are not limited to, nylons and other polyamides, polyethylenes, including LDPE, LLDPE, HDPE, and polyethylene copolymers with other polyolefms, polyvinylchlorides (both plasticized and unplasticized), fluorocarbon resins, such as polytetrafluoroethylene, polystyrenes, polypropylenes, cellulosic resins, such as cellulose acetate butyrates, acrylic resins, such as polyacrylates and polymethylmethacrylates, thermoplastic blends or grafts such as acrylonitrile-butadiene-styrenes or acrylonitrile-styrenes, polycarbonates, polyvinylacetates, ethylene vinyl acetates, polyvinyl alcohols, polyoxymethylene, polyformaldehyde, polyacetals, polyesters, such as polyethylene terephthalate, polyether ether ketone, and phenol-formaldehyde resins,
  • thermoset polymers for use as, or inclusion in, the binder used in the invention include, but are not limited to, polyurethanes, silicones, fluorosilicones, phenolic resins, melamine resins, melamine formaldehyde, and urea formaldehyde.
  • Suitable elasomers for use as or inclusion in, the binder used in the invention include but are not limited to natural and/or synthetic rubbers, like styrene- butadiene rubbers, neoprenes, nitrile rubber, butyl rubber, silicones, polyurethanes, alkylated chlorosulfonated polyethylene, polyolefms, chlorosulfonated polyethylenes, perfluoroelastomers, polychloroprene (neoprene), ethylene-propylene-diene terpolymers, chlorinated polyethylene, VITON ® (fluoroelastomer), and ZALAK ® (Dupont-Dow elastomer).
  • natural and/or synthetic rubbers like styrene- butadiene rubbers, neoprenes, nitrile rubber, butyl rubber, silicones, polyurethanes, alkylated chlorosulfonated polyethylene, polyole
  • thermoplastics listed above can also be thermosets, depending upon the degree of crosslinking, and that some of each may be elastomers, depending upon their mechanical properties, and that the particular categorization used above is for ease of understanding and should not be regarded as limiting or controlling.
  • Naturally occurring and synthetically modified naturally occurring polymers suitable for use in the invention include, but are not limited to, natural and synthetically modified celluloses, such as cotton, collagens, and organic acids.
  • Biodegradable polymers suitable for use in the invention include, but are not limited to, polyethylene glycols, polylactic acids, polyvinylalcohols, co-polylactideglycolides, and the like.
  • Material binders may also be chosen from those classes of materials which swell through fluid absorption. These materials include crosslinked polymers such as synthetically produced polyaciylic acids, and polyacrylamides and naturally occuring organic polymers such as celluloses. Minerals which swell with fluid absorption include bentonite and derviatives. These swellable materials bind the magnesium containing mineral particulates or fibers through pressure techniques.
  • the magnesium containing mineral originating from a magnesium containing silicate, magnesium oxide, magnesium hydroxide, or magnesium phosphate and GAC or bone char material are present in approximately equal amounts, with the percentage of binder material kept to a minimum.
  • the binder used must be stable to the temperature, pressure, electrochemical, radiative, and chemical conditions presented in the sterilization process, and should be otherwise compatible with the sterilization method.
  • binders suitable for sterilization methods involving exposure to high temperatures include cellulose nitrate, polyethersulfone, nylon, polypropylene, polytetrafluoroethylene (TEFLON ® ), and mixed cellulose esters.
  • Purification materials prepared with these binders can be autoclaved when the binder polymers are prepared according to known standards.
  • the purification material is stable to both steam sterilization or autoclaving and chemical sterilization or contact with oxidative or reductive chemical species, as this combination of sterilizing steps is particularly suitable for efficient and effective regeneration of the purification material.
  • sterilization and regenerating of devices incorporating the magnesium containing mineral materials may be conducted by passing solutions of salt, acid, and/or caustic solutions through the filter.
  • the electrical potential necessary to generate said species can be attained by using the purification material itself as one of the electrodes.
  • the purification material which contains polymeric binder
  • the purification material can be rendered conductive through the inclusion of a sufficiently high level of conductive particles, such as GAC, carbon black, or metallic particles to render a normally insulative polymeric material conductive.
  • a sufficiently high level of conductive particles such as GAC, carbon black, or metallic particles to render a normally insulative polymeric material conductive.
  • an intrinsically conductive polymer may be used as or blended into the binder.
  • Suitable intrinsically conductive polymers include doped polyanilines, polythiophenes, and other known intrinsically conductive polymers. These materials can be incorporated into the binder in sufficient amount to provide a resistance of less than about 1 k ⁇ , more particularly less than about 300 ⁇ .
  • the purification material of the present invention need not be in the form of a block, but may also be formed into a sheet or film.
  • This sheet or film may, in a particular embodiment, be disposed on a woven or nonwoven web of, e.g., a polymer.
  • the polymer used to form the woven or nonwoven web may be any thermoplastic or thermosetting resin typically used to form fabrics.
  • Polyolefms, such as polypropylene and polyethylene are particularly suitable in this regard.
  • the efficiency of the purification material and the method for using it to reduce microbiological and chemical contaminants and the flow rate of the fluid through the material are a function of the pore size within the block and the influent fluid pressure.
  • flow rate is a function of pore size
  • the pore size within the block can be regulated by controlling the size of the magnesium mineral and GAC granules. For example, a large granule size provides a less dense, more open purification material which results in a faster flow rate, and small granule size provides a more dense, less open purification material which results in a slower flow rate.
  • a block 17 formed with relatively large magnesium mineral granules will have less surface area and interaction sites than a block formed with smaller granules.
  • the purification material of large granules must be of thicker dimension to achieve equal removal of microbiological contaminants. Because these factors are controllable within the manufacturing process, the purification materials can be customized by altering pore size, block volume, block outer surface area, and geometric shape to meet different application criteria. Average pore size in a particular embodiment is kept to below several microns, and more particularly to below about one micron, to preclude passage of cysts. It should be noted that the pore size described herein does not refer to the pores within the magnesium mineral or other adsorbent or absorbent particles themselves, but rather to the pores formed within the purification material when the particles are aggregated together by the binder.
  • the method of making the material of the invention in its most general aspect, involves combining the particulate magnesium containing minerals (and optional additional particulate adsorbent material(s)) with the binder material under conditions of pressure and temperature that allow at least a portion of the binder to be present in liquid form and that allow for compaction of the particulate, and then solidifying the binder around and/or between the particles.
  • the precise nature of the production process will depend to a certain extent upon the nature of the binder material.
  • the binder material is supplied in the form of a liquid solution, suspension, or emulsion (e.g., in a volatile solvent), it may be contacted with the particles by dipping or spraying, and the wet particles compressed in a mold.
  • the mold may be optionally heated to evaporate any necessary solvent.
  • the resulting molded material is then dried to form the purification material of the invention.
  • the binder is a polymer resin
  • it will typically be mixed in pellet form with the particles of the adsorbent material, and the resulting mixture heated and extruded or molded into the desired shape.
  • suitable particulate/binder extrusion processes and equipment are disclosed in U.S. Patent Nos. 5,189,092; 5,249,948; and 5,331,037. Other extrusion equipment and processes may also be used.
  • the mixture may be heated and injection molded, without the need for any extrusion.
  • the binder a thermoset, may be generated through a crosslinking process that incorporates initiation by chemical processes, electrochemical processes, irradiation and through physical parameters of temperature and pressure variations.
  • FIG. 1 illustrates a typical specific embodiment of a filtration apparatus containing the purification material of the invention, which incorporates a rigid porous block filter.
  • a removable housing 11 is mated with a cap 12, the cap 12 having an inflow orifice 13 and an outflow orifice 14.
  • a water supply conduit 15 is joined to the inflow orifice 13 to deliver non-treated water into the device, and a water discharge conduit 16 is joined to the outflow orifice 14 to conduct treated water from the device. Water passes into the housing 11.
  • Fig. 1 is provided as a representative illustration of one possible configuration. It is to be understood that other configurations where water is caused to pass through a porous filter block (which may have different geometrical shapes and/or different flow properties) are contemplated to be within the scope of the invention.
  • the block 17 may be formed by any of a number of known methods, such as by extrusion, compression, molding, sintering, material swelling pressure or other techniques.
  • Figs. 2a and 2b shows two embodiments where the purification material of the invention is used in the form of a sheet or film.
  • Fig. 2a shows purification material 1 used in connection with normal flow-through filtration, indicated by arrow 2, which represents the fluid being filtered by passage through the sheet or film 1.
  • Fig. 2b shows purification material 1 used in connection with crossflow filtration. Fluid flowing across the filter is indicated by double-headed arrow 3, while fluid flowing through the purification material 1 is indicated by arrow 2. The cross flow fluid indicated by arrow 3 sweeps across the surface of the purification material 1, decreasing the level of particulate matter deposited thereon.
  • a cylindrical filter block 17 of the shape shown in Fig. 1 may be prepared with a material composition of approximately 42.5% magnesium silicate obtained from R.T. Vanderbilt Company, approximately 42.5% GAC obtained from KX Industries, and approximately 15%) thermoplastic binder material selected from one or more of the thermoplastics described above. The material may then be extruded at a temperature that provides a uniform mixture of magnesium silicate, GAC, and thermoplastic binder.
  • the cylindrical or toroidally shaped block 17 is approximately 9.8 inches in length, with an outer diameter of approximately 2.5 inches and an inner diameter (the bore 18) of approximately 1.25 inches.
  • This shape filter fits into a standard water filtration housing used in the home and industrial settings.
  • the filter material has a resistance of about 300 ⁇ .
  • the filter prepared in Example 1 may be challenged by exposing it to tap water that is filtered with activated carbon and then seeded with 2.3x10 8 colony forming units per liter of E. coli bacteria, K. terrigena or similar species and 1.0x10 7 plaque forming units per liter of MS2.
  • the seeded water is passed through the filter block 17 at a flow rate of approximately 2 liters/minute for 3 minutes, followed by collection of a 500 ml effluent sample. Bacteria and virus are assayed using standard methods. Results indicate significant microbial reduction.
  • the composite prepared in Example 1 may be used to reduce a water soluble chlorine species such as hypochlorous acid in an oxidized state to a chlorine species in a reduced state
  • Chlorine Chlorine levels of approximately 2.0 mg/L were reduced to below the detection limits of standard test strip based assays.
  • the material of the invention is extremely useful in the area of water purification, particularly the area of drinking water purification. Because of the extremely high efficiency with which the material of the present invention removes microorganisms from water, it meets the EPA guidelines for materials used as microbiological water purifiers. In addition to functioning as a purifier for drinking water, the material of the invention can also be used to purify water used for recreational purposes, such as water used in swimming pools, hot tubs, and spas.
  • the material of the invention can be used to fractionate blood by separating blood components, e.g., plasma, from blood cells, and to remove microorganisms from other physiological fluids.
  • the material can also be used in hospital or industrial areas requiring highly purified air having extremely low content of microorganisms, e.g., in intensive care wards, operating theaters, and clean rooms used for the therapy of immunosuppressed patients, or in industrial clean rooms used for manufacturing electronic and semiconductor equipment.
  • the material of the invention has multiple uses in fermentation applications and cell culture, where it can be used to remove microorganisms from aqueous fluids, such as fermentation broths or process fluids, allowing these fluids to be used more efficiently and recycled, e.g., without cross-contamination of microbial strains.
  • aqueous fluids such as fermentation broths or process fluids
  • the material is so efficient at removing microorganisms and at retaining them once removed, it can be used as an immobilization medium for enzymatic and other processing requiring the use of microorganisms.
  • a seeding solution containing the desired microorganisms is first forced through the material of the invention, and then substrate solutions, e.g., containing proteins or other materials serving as enzymatic substrates, are passed through the seeded material.
  • the substrates dissolved or suspended therein come into contact with the immobilized microorganisms, and more importantly, with the enzymes produced by those microorganisms, which can then catalyze reaction of the substrate molecules.
  • the reaction products may then be eluted from the material by washing with another aqueous solution.
  • the material of the invention has numerous other industrial uses, e.g., filtering water used in cooling systems. Cooling water often passes through towers, ponds, or other process equipment where microorganisms can come into contact with the fluid, obtain nutrients and propagate. Microbial growth in the water is often sufficiently robust that the process equipment becomes clogged or damaged and requires extensive chemical treatment. By removing microorganisms before they are able to propagate substantially, the present invention helps to reduce the health hazard associated with the cooling fluids and the cost and dangers associated with chemical treatment programs.
  • the material of the invention can be used to increase indoor air quality in homes or offices in conjunction with the air circulation and conditioning systems already in use therein.
  • the purification material of the invention can also be used to purify other types of gases, such as anesthetic gases used in surgery or dentistry (e.g., nitrous oxide), gases used in the carbonated beverage industry (e.g., carbon dioxide), gases used to purge process equipment (e.g., nitrogen, carbon dioxide, argon), and/or to remove particles from surfaces, etc.
  • the method of using the material of the invention is relatively simple and should be apparent to those of skill in the filtration art.
  • the fluid or gas to be filtered is simply conducted to one side of a block or sheet of material of the invention, typically disposed in some form of housing, and forced through the material as the result of a pressure drop across the purification material. Purified, filtered fluid or gas is then conducted away from the "clean" side of the filter and further processed or used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Biomedical Technology (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Filtering Materials (AREA)
  • Water Treatment By Sorption (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

A method and device for the filtration and/or purification of fluids such as water or other solutions containing microbiological and chemical contaminants, such as cysts, bacteria and/or virus and heavy metals and/or pesticides, where the fluid is passed through a housing (11) containing a purification material in a porous block (17) composed of magnesium containing minerals and more preferably silicates containing magnesium, oxides containing magnesium, hydroxides containing magnesium, and phosphates containing magnesium and absorption media in a fixed binder matrix.

Description

COMPOSITIONS OF INSOLUBLE MAGNESIUM CONTAINING MINERALS FOR USE IN FLUID FILTRATION
FIELD OF THE INVENTION
This invention relates generally to the field of solution and fluid filters c purification devices, primarily to aqueous solution filters and water purification, devices for gases and water and other aqueous liquids, which remove contaminants from the gas or aqueous liquid solution passed through them. In its more particular aspects, the invention relates to the field of such devices that remove chemical and microbiological contaminants, including heavy metals and pesticides, bacteria and viruses and their components, from water or aqueous solutions.
BACKGROUND OF THE INVENTION Purification or filtration of water or other aqueous solutions is necessary for many applications, from the provision of safe or potable drinking water to biotechnology applications including fermentation processing and separation of components from biological fluids. Similarly, the removal of microbial organisms from breathable air in hospitals and clean rooms, where ultrapurified air is required, and in environments where the air will be recirculated, such as aircraft or spacecraft, is also an important application for filtration media. In recent years, the need for air filtration and purification in the home has become more recognized, and the competing concerns of energy efficiency and indoor air quality have lead to numerous air filtration products, such as HEPA filters and the like, that purport to remove small particles, allergens, and even microorganisms from the air. There are many well-known methods currently used for water purification, such as distillation, ion-exchange, chemical adsorption, filtering or retention, which is the physical occlusion of particulates. Particle filtration may be completed through the use of membranes or layers of granular materials, however in each case the pore size of the material and the space between the granular materials controls the particle size retained. Additional purification media include materials that undergo chemical reactions, which alter the state or identity of chemical species in the fluid to be purified. In most cases a combination of techniques are required in order to completely purify fluids, such as water. Combinations of technologies may be implemented by combining functions in a single device or using several devices in series where each performs a distinct function. Examples of this practice include the use of mixed resins that remove both negative and positively charged chemical species as well as species without charge.
Many of these water purification techniques and practices are costly, energy inefficient and/or require significant technical know-how and sophistication. Traditional means of reducing these complications require extensive processing or specially designed apparatus. Unfortunately, development of low cost techniques do not adequately address the removal of harmful chemical and biological contaminates, bacteria and viruses. For example, simple point-of-use purification devices, such as filters attached to in-house water supply conduits or portable units for campers and hikers, cannot sufficiently remove bacteria and viruses unless relatively costly membrane technology or strong chemical oxidizers, such as halogens or reactive oxygen species, are utilized.
The Environmental Protection Agency (EPA) has set forth minimum standards for acceptance of a device proposed for use as a microbiological water purifier. Common coliforms, represented by the bacteria E. coli and Klebsiella terrigena, must show a minimum 6-log reduction, 99.9999% of organisms removed, from an influent concentration of lxl07/100 ml. Common viruses, represented by poliovirus 1 (LSc) and rotavirus (Wa or SA-11), which show resistance to many treatment processes, must show a minimum 4 log reduction, 99.99% of organisms removed, from an influent concentration of lxl07/L. Cysts, such as those represented by Giardia muris or Giardia lamblia, are widespread, disease- inducing, and resistant to chemical disinfection. Devices that claim cyst removal must show a minimum 3 log reduction, 99.9% of cysts removed, from an influent concentration of lxl06/L or lxl07/L, respectively. The EPA has accepted the use of other particles in the appropriate size range as a means of testing devices that claim this function. Materials that are highly efficient at removing and immobilizing microbial organisms have numerous applications, but a particular area of application is in the biotechnology and fermentation industries. Not only would such materials be useful in the processing of fermentation broth for recycling or reuse, they also would have utility as microbial immobilization materials for the microbes of interest to the fermentation process.
It is known to use magnesium silicates, magnesium oxides, magnesium hydroxides and magnesium phosphates in granular or particulate, or in fiber form as a chemical binding agent. Some forms of magnesium silicates are known as asbestos and these materials which can be mined in fiber form have been mixed with cellulose and used for the removal of microorganisms and particulate matter from fluids that will be used for consumption. The application of magnesium silicates in the form of asbestos containing minerals for fluid filtration has decreased dramatically since the materials are known to cause respiratory diseases when inhaled. Magnesium silicates in the form of asbestos fibers have found commercial application as fire retardant materials and materials capable of strengthening concretes and synthetic polymers. Non asbestos forms of magnesium silicates include minerals identified as talc(s) and are used commercially in the pharmaceutical and cosmetic, and paint and coating industries. Aluminum and magnesium containing silicates are also used in these fields.
Magnesium containing silicates can be produced through chemical synthesis or obtained through mining/processing of raw ores, which are found globally. Magnesium containing silicates, magnesium oxides, magnesium hydroxides and magnesium phosphates can function as a biological water purification agent through a complex process, which includes the chemical adsorption of chemicals, biological materials and microorganisms.
Magnesium silicates are naturally occurring minerals that are commonly found in a mixture of structural forms and with varying concentrations of other metals substituted for the magnesium metal. Magnesium oxides, magnesium hydroxides and phosphates can also be found naturally and produced by synthetic methods.
Other components of the mined mixtures of magnesium silicates include metals such as aluminum, titanium, calcium, iron, copper, and many others. Magnesium oxides are generated for use in many products but include water treatment processes. Magnesium phosphates can be used in a range of applications including water treatment.
There are no known commercially available microbiological filtration or purification devices incorporating magnesium silicate, magnesium oxide, magnesium hydroxide, or magnesium phosphate compounds in porous block form. There is literature indicating that magnesium silicates may be used as filtration materials, especially in fiber form and even more specifically when mixed with cellulose and/or fiberglass fibers. The use of magnesium silicates, specifically asbestos fiber filter sheets, to treat water is discussed in the literature and previously demonstrated by companies like Seitz. Seitz produced asbestos fiber filters for treating water for the beverage industry for many years. There is no known disclosure of using magnesium silicates in block form to remove microbial organisms from the water treatment stream.
However, it has not been demonstrated that magnesium silicates may be used or incorporated in a device that meets the minimum EPA requirements described above. In addition there have been no efforts to generate porous block materials that eliminate the hazards associated with the use of some types of magnesium silicate materials.
Scientific literature indicates that cellulose-asbestos filter sheets were also examined for incorporation into rapid concentration laboratory methods for virus analysis, but these efforts proved unsuccessful.
A water treatment process is also disclosed in U.S. Patent No. 4,167,479, which uses an active media made of powdered minerals (less than 50 mesh) and active micro-organisms to purify waste water. The active media is combined with the wastewater and circulated to allow biological and chemical reactions to occur. The minerals in this process are used as granular additives to the water system and are dispersed throughout the fluid, as opposed to being part of a binder material through which the water to be treated would flow. This reference does not provide or suggest a method for removing microorganisms from the wastewater. In fact, it actually uses active microorganisms as part of the treatment, and does not contemplate their removal. Furthermore, the reference specifically emphasizes that the minerals provide metal ions to precipitate phosphates, reducing or eliminating the need to use other types of chemicals, such as alum, for precipitating phosphates.
Additionally, materials in the fields of ceramic and bio-implants are known. These materials, however, are not fabricated for, nor are they capable of passing fluids for the purpose of fluid filtration.
Accordingly, there remains a need in this art for an uncomplicated, safe, inexpensive fluid purification and filtration method and device incorporating magnesium silicates, magnesium oxides, magnesium-aluminum silicates, magnesium hydroxides, and magnesium phosphates obtained from natural and synthetic materials. It is the intention of this invention and art to use magnesium containing minerals to generate a practical fluid purification and a filtration device and method that permits the safe use of all magnesium silicates, oxides, and phosphates in the forms which are readily available and commonly found or synthesized by a variety of different methods. There is also a need in the art for a method and device that meets the minimum EPA requirements for designation as a microbiological water purifier, such that the device is more than suitable for consumer and industry point-of-use applications.
SUMMARY OF THE INVENTION
To this end, the present inventors have discovered that a significant problem in the known use of some types of magnesium silicate containing filter devices is that the mineral material is dangerous when inhaled and when used as filter sheets open to the atmosphere, fibers of the mineral can be lost and possibly inhaled. These sheets also can be ripped or torn and present a hazard.
Further, the present inventors have discovered that an additional significant problem in the known magnesium containing minerals incorporating filter devices is that when the magnesium containing minerals are in loose form, whether granular, particulate, or fiber. The effectiveness of filters generated with materials in loose form is compromised by channeling and by-pass effects caused by the pressure of fluid, in particular, water and aqueous solutions, flowing through the filter media as well as particle erosion and aggregation. Because chemicals, viruses and bacteria are removed by intimate contact with the adsorption material, even relatively small channels or pathways in the granular material formed over time by water pressure, water flow, particle erosion, or particle aggregation are easily sufficient to allow passage of undesirable microbiological contaminants through the filter.
For example, taking water as an exemplary fluid and using the material of the invention as a filtration medium for microbial organisms, calculations based on a virus influent concentration of lxl06/L show that where a 4-log reduction is to be expected, only a 3.7 log reduction actually occurs if only 0.01% of the water bypasses treatment by passing through channels formed in the filter media during filtration. If 0.1%) of the water passes through untreated, then only a 3 log reduction occurs. If 1% passes through untreated, only a 2 log reduction occurs, and if 10% passes untreated, only a 1 log reduction occurs. Where a 6-log reduction is expected, the detrimental results of channeling are even more dramatic, with only a 4-log reduction actually occurring when 0.01% of the water bypasses treatment. This invention solves this problem by providing a microbiological filter and method for removing contaminants, including bacteria and viruses, where magnesium containing minerals and other granular adsorptive filter media are fixed within a chemical binder material to form a porous filter material that eliminates the possibility of channeling and active agent by-pass. This invention is in general a device and method for the purification and filtration of aqueous fluids, in particular water (such as drinking water or swimming or bathing water), or other aqueous solutions (such as fermentation broths and solutions used in cell culture), or gases and mixtures of gases such as breathable air, found in clean rooms, hospitals, diving equipment homes, aircraft, or spacecraft, and gases used to sparge, purge, or remove particulate matter from surfaces. The use of the device and method of the invention results in the removal of an extremely high percentage of microbiological contaminants, including bacteria and viruses and components thereof. In particular, the use of the device and method of the invention results in purification of water to a level that meets the EPA standards for designation as a microbiological water purifier. In one embodiment, the invention relates to a purification material for fluids that contains particulate magnesium containing minerals that is in the form of a porous block as the result of the presence of a binder. Typically, at least a portion of these magnesium containing minerals is from magnesium silicates, magnesium aluminum silicates, magnesium oxides, magnesium phosphates and / or related magnesium containing minerals, and has been obtained from natural sources, e.g., mining, or from synthetic sources such as the mixing of chemicals containing silicon, magnesium, and aluminum. Also typically, the binder is a polymeric or oligomeric material that is capable of maintaining the particulate magnesium mineral in a block structure. This allows the purification material to be molded or pressed into any desired shape, e.g., a shape suitable for inclusion into the housing of a filtration device, which provides for fluid inflow and outflow, and which filtration device has one or more chambers for contact of the fluid with the purification material. Such a device forms another embodiment of the invention. In addition to maintaining the magnesium mineral particles immobilized in a unitary block, the polymeric binder also provides desirable physical characteristics to the filter material, e.g., rendering it rigid or flexible, depending upon the type and amount of polymeric binder used.
In another embodiment, the invention relates to a purification material for fluids that is in the form of a sheet or membrane, containing the particulate magnesium containing minerals and immobilized with a binder.
In another embodiment, the invention relates to a purification material for fluids that is in the form of a block, sheet or membrane, containing the particulate magnesium containing minerals and immobilized with a pressure-technique that uses fluid-swelling materials.
The invention also relates to methods of filtering fluids, such as water, aqueous solutions, and gases, to remove a large proportion of one or more types of microorganisms contained therein, by contacting the fluid with the purification material of the invention. In a particular aspect of this embodiment of the invention, this contacting occurs within the device described above, with the unfiltered fluid flowing through an inlet, contacting the purification material in one or more chambers, and the filtered fluid flowing out of the chamber through an outlet.
The purification material of the invention can be used to purify drinking water, to purify water used for recreational purposes, such as in swimming pools, hot tubs, and spas, to purify process water, e.g. water used in cooling towers, to purify aqueous solutions, including but not limited to, fermentation broths and cell culture solutions (e.g., for solution recycling in fermentation or other cell culture processes) and aqueous fluids used in surgical procedures for recycle or reuse, and to purify gases and mixtures of gases such as breathable air, for example, air used to ventilate hospital or industrial clean rooms, air used in diving equipment, or air that is recycled, e.g., in airplanes or spacecraft, and gases used to sparge, purge or remove volatile or particulate matter from surfaces, containers, or vessels. The purification material of the invention has the additional advantage of making use of readily available magnesium mineral materials, including those obtained from natural sources, while still maintaining high purification efficiency.
In yet another embodiment of the invention, the material of the invention, namely magnesium containing minerals and optionally other adsorptive materials in a binder matrix and formed into a block or sheet, can be used as an immobilization medium for microorganisms used in biotechnology applications such as fermentation processes and cell culture. In this embodiment, biological process fluids, such as nutrient, broths, substrate solutions, and the like, are passed through the immobilization material of the invention in a manner that allows the fluids to come into contact with the microorganisms immobilized therein, and effluent removed from the material and further processed as needed.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a cross-sectional view illustrating a particular embodiment of the invention, namely a water filter housing containing a block filter incorporating magnesium containing minerals and granulated activated charcoal (GAC) in a binder matrix according to the invention.
Figs. 2a and 2b are schematic views of a particular embodiment of the invention, namely a filter material containing magnesium containing minerals and a binder matrix in the form of a membrane or sheet. DETAILED DESCRIPTION OF THE INVENTION
As indicated above, one embodiment of the invention relates to a purification material in the form of a block filter containing granulated magnesium containing minerals in a binder, which is typically a polymeric material. In a particular aspect of this embodiment, the invention relates to a rigid block filter that contains a mixture of granulated magnesium minerals and magnesium-aluminum derivatives and granulated activated charcoal (GAC) or bone char or other adsorptive filter media in a binder material, such as a thermoplastic material, such that the magnesium containing minerals and derivatives and GAC are fixed within the binder matrix, and that channeling from flow during water treatment cannot occur. The purification material of the invention can be produced by extrusion, molding including injection molding, or by compression methods. Fibrillation may also be used to prepare fibrils of the mixture of binder polymer and magnesium minerals that can then be formed into a sheet, film, or block. It may be produced in any shape or size and may be rigid or flexible. Pressure techniques which use fluid swelling materials may also be used to prepare the mixture of binder and magnesium minerals that can then be formed into a sheet, film, or block. It may be produced in any shape or size and may be rigid or flexible.
The pore size of the filter block influences flow rates of the fluid through the filter, and is a function of the size of the granular particles incorporated into the filter block. As used herein, the term "block" does not denote any particular geometrical shape, but rather that the material is not a sheet or membrane. Nonlimiting examples of "blocks" as this term is intended to be used include tubes, annular rings, as well as more conventional geometrical solids. Material formed into flexible blocks is particularly suitable for use in pipes or tubes that serve as the fluid filter medium.
One of the desirable features of the purification material of the invention is that it may be formed into any desired shape, and thus provides ease of handling and use. For example, the purification material may be formed into a monolith or block that fits into conventional housings for filtration media or it can be shaped to provide purification as part of a portable or personal filtration system. Alternatively, the material may be formed into several different pieces, through which water flows in series or in parallel. Sheets or membranes of the purification material may also be formed. The rigidity of the purification material, whether in block form or in sheet/membrane form, may be altered through inclusion of flexible polymers in the binder material.
While not wishing to be bound by any theory, it is believed that the purification material of the invention achieves its unusually high efficiency in removing microorganisms from fluids partly as the result of the immobilization of the magnesium mineral particles in the binder, and the necessity for fluid flowing through the purification material to follow an extended and tortuous path therethrough, instead of forming channels through the purification material as occurs in prior magnesium mineral-containing purification materials. This path ensures that the fluid contacts a larger proportion of the surface area of the magnesium mineral particles, and it prevents sustained laminar flow of the fluid through the filtration material. This latter effect is believed to help prevent laminae of fluid containing microorganisms from avoiding sustained contact with magnesium-mineral particles in the filter. After the purification material has been in service for a period of time, additional filtration by occlusion will occur as adsorbed material accumulates in the pores of the purification material.
Those familiar with the art of fluid filtration will understand that the pore size and physical dimensions of the purification material may be manipulated for different applications and that variations in these variables will alter flow rates, back-pressure, and the level of chemical and microbiological contaminant removal. Likewise those knowledgeable in the art will recognize that variations in the percentages of each component of the purification material will provide some variability in utility. For example, increasing the percentage of magnesium containing minerals in the purification material will result in a material having an increased number of interaction sites for chemical and biological species, while increasing the percentage of binder will result in a purification material having material and mechanical properties closer to that of the binder material and with reduced interaction sites.
In one particular embodiment of the invention, the magnesium mineral used is in the form of magnesium silicate, and the GAC material are present in approximately equal amounts, with the percentage of binder material kept to a minimum. However, the magnesium mineral used in the invention may be obtained from other natural or synthetic/industrial sources and mixtures of the different derivatives can provide differences in the properties of the purification material. For example, adding sodium to the filter block can increase the sodium concentration in the effluent water if water is used as the fluid. This can be useful in, e.g. purifying hard water in such a way as to maintain desirable water hardness levels therein. Sodium in the filter material may be obtained either by inclusion of sodium containing magnesium minerals, inclusion of sodium salts and compounds, or by preconditioning the purification material by passing sodium-containing solutions therethrough. Likewise, as the number of binding sites is increased through the use of different structural forms and orientation of different crystal faces, the binding of metal ions, radioactive isotopes, and microorganisms can also be increased. Commonly, exposure to increased temperatures allows conversion between crystalline and amorphous forms. Commonly, exposure to metals in a synthesis procedure allows replacement of some of the magnesium ions in both crystalline and amorphous forms.
Those experienced in the art will also understand that many different structural forms including different crystal or amorphous lattices are possible for magnesium minerals, magnesium-aluminum minerals, and for other adsorbent materials used in the invention, and that these variations will yield differences in properties of the resulting purification material, as certain structural structures improve and inhibit interactions with chemicals, microorganisms and other biological materials. These differences in properties result from differences in interactions between the microorganisms and other biological materials and the different positive and negative ions that are included in the crystal structure.
Those experienced in the art will also understand that different chemical and biological reactions can occur when these materials are place in fluids such as water which will change the composition. As example the interaction of magnesium oxide with water and salts can produce magnesium hydroxide.
In another embodiment of the invention, the purification material is constructed to withstand sterilization. Sterilization processes include thermal processes, such as steam sterilization or other processes wherein the purification material is exposed to elevated temperatures or pressures or both, resistive heating, radiation sterilization wherein the purification material is exposed to elevated radiation levels, including processes using ultraviolet, infrared, microwave, and ionizing radiation, and chemical sterilization, wherein the purification material is exposed to elevated levels of oxidants or reductants or other chemical species, and which is performed with chemicals such as halogens, reactive oxygen species, formaldehyde, surfactants, metals and gases such as ethylene oxide, methyl bromide, beta-propiolactone, and propylene oxide.
Additionally, sterilization may be accomplished with electrochemical methods by direct oxidation or reduction with microbiological components or indirectly through the electrochemical generation of oxidative or reductive chemical species. Combinations of these processes are also used on a routine basis. It should also be understood that sterilization processes may be used on a continuous or sporadic basis while the purification material is in use. In general, the invention comprises a device and a method for the filtration and purification of a fluid, in particular an aqueous solution or water, to remove organic and inorganic elements and compounds present in the water as particulate material. In particular, the device and method can be used to remove chemical and microbiological contaminants, including bacteria and viruses and components thereof, from water or other fluids or gasses destined for consumption or other use by humans or other animals. The method and device of the invention are particularly useful in these applications where the reduction in concentration of microbiological contaminants made possible by the invention meets the EPA standards for microbiological water purification devices, and also exceeds the effectiveness of other lαiown filtration and purification devices incorporating granulated adsorption media that contain magnesium minerals, such as those obtained from magnesium silicate and magnesium-aluminum silicates. In a particular embodiment of the invention, the purification material is a porous block formed by granulated or particulate magnesium minerals, which is defined herein to include magnesium silicates, magnesium aluminum silicates, magnesium oxides, and magnesium phosphates and other optional adsorptive granular materials, described in more detail below, such as granulated activated charcoal (GAC), retained within a polymer binder matrix. In the method corresponding to this particular embodiment, the chemical and microbiological contaminants are removed from the water when the water is forced through the porous block by water pressure on the influent side, or by a vacuum on the effluent side, of the filter block.
In an embodiment of the invention where the purification material is composed of a mixture of magnesium minerals and an adsorptive granular filter media, for example GAC, such components can be dispersed in a random manner tliroughout the block. The purification material can also be formed with spatially distinct gradients or separated layers. For example, magnesium minerals and GAC granules may be immobilized in separate layers using a solid binder matrix, for instance, a polymer thermoplastic such as polyethylene or the like, so that movement of the magnesium minerals and GAC particles is precluded and detrimental channeling effects during fluid transport through the block are prevented. If the components reside in separate locations, the fluid flow is sequential through these locations. In a particular example of this embodiment, at least a portion of the magnesium minerals present originates from magnesium silicates, magnesium aluminum silicates, magnesium oxides, magnesium phosphates and mixtures thereof. Examples of suitable materials are those designated as magnesium silicates and sold by R.T. Vanderbilt Company and as magnesium oxides and magnesium hydroxide which is sold by Martin Marietta Specialty Chemical. The material may be ground to a desirable particle size, e.g., 80-325 mesh or smaller. A typical analysis of these materials shows 50% or greater and 99% or greater magnesium silicate, magnesium oxide and magnesium hydroxide respectively. The element binding characteristics of these materials have been reported by producers of these raw materials. The organic molecule binding capabilities have also been reported by producers of these raw materials.
In this embodiment, the magnesium containing minerals (magnesium silicates, magnesium aluminum silicates, magnesium oxides, magnesium hydroxides, and magnesium phosphates, etc.) and the GAC are mixed in approximately equal amounts with the minimal amount of binder material necessary to compose a monolithic purification material. However, the concentrations of magnesium minerals, GAC, and binder are substantially variable, and materials having different concentrations of these materials may be utilized in a similar fashion without the need for any undue experimentation by those of skill in the art. In general, however, when GAC, or bone char (apatite containing) is used as the additional adsorbent material, its concentration in the mixture is generally less than 50 % by weight, based upon the weight of the composition before any drying or compacting. Additionally, adsorbents other than GAC may be substituted completely for, or mixed with, the GAC in a multicomponent mixture. Examples of these adsorbents include various ion-binding materials, such as synthetic ion exchange resins, zeolites (synthetic or naturally occurring), diatomaceous earth, bone char and apatite minerals, calcium silicate materials and one or more other phosphate-containing materials, such as minerals of the phosphate class, in particular, minerals containing magnesium and silicate described herein.
In particular, minerals of the silicate class, and containing magnesium, are particularly suitable for the invention. These materials may also contain iron, aluminum, and calcium. These materials may be calcined and processed by a number of methods to yield mixtures of varying compositions.
Minerals containing magnesium are found in the hydroxide and oxide class and include magnesium oxides and hydroxides. Magnesium oxide is known as periclase and is industrially important. Brucite is an important mineral containing magnesium which is found associated with many magnesium containing minerals such as those in the serpentine group. The serpentine group includes antigorite, clinochrysotile, lizardite, orthochrysotile, and parachrysotile. Talc is similar to brucite in that it is found associated with many different minerals. It is a common form of magnesium silicate and particularly suitable for the invention.
Minerals containing phosphate and magnesium are particularly suitable for the invention. These minerals are commonly associated with other elements such as calcium, iron, and aluminum and belong to the apatite and phosphate class of minerals.
Minerals containing silicate and magnesium are many and yield particulate matter that is particularly suitable for the invention. As example, the general formula for mica is AB2.3 (Al, Si)Si3 O10 (F, OH)2. In most micas the A is usually potassium, K, but can be calcium, Ca, or sodium, Na, or barium, Ba, or some other elements in the rarer micas. The B in most micas can be aluminum, Al, and/or lithium, Li, and/or iron, Fe, and/or magnesium, Mg. The mica group has many members. Examples of common mica minerals include, but are not limited to, Biotite, Fuchsite, Lepidolite, Muscovite, Phlogopite, and Zinnwaldite.
Garnets are also examples of minerals that can be used with this invention. The general formula for garnets is A3B2(Si04)3. The A represents divalent metals such as calcium, iron, magnesium and manganese. The B represents a trivalent metal such as aluminum, chromium, iron, and other elements found in rarer members of the group. The garnet is a large group of which examples include, but are not limited to, almandine, andradite, grossular, pyrope, spessartine, and uvarovite. The montmorillonite/smectite group is composed of several minerals including pyrophyllite, talc, vermiculite, sauconite, saponite, nontronite and montmorillonite differing mostly in chemical content. The general formula is (Ca, Na, H)(A1, Mg, Fe, Zn)2(Si, Al)4O10(OH)2 - xH20, where x represents the variable amount of water that members of this group could contain.
The chlorite group is a large and common group of minerals and can be used in the present invention. The general formula is X4-6Y4O10(OH, 0)8. The X represents either aluminum, iron, lithium, magnesium, manganese, nickel, zinc or rarely chromium. The Y represents either aluminum, silicon, boron or iron but mostly aluminum and silicon. Examples include, but are not limited to, Amesite (Mg, Fe)4Al4Si2O10(OH)8, Baileychlore (Zn, Fe+2, Al, Mg)6(Al, Si)4O10(O, OH)8,Chamosite (Fe, Mg)3Fe3AlSi3O10(OH)8, Clinochlore (kaemmererite) (Fe,
Mg)3Fe3AlSi3O10(OH)8, Cookeite LiAl5Si3O10(OH)8, Corundophilite (Mg, Fe, A1)6(A1, Si)4O10(OH)8, Daphnite (Fe, Mg)3(Fe, A1)3(A1, Si)4O10(OH)8, Delessite (Mg, Fe+2, Fe+3, A1)6(A1, Si)4O10(O, OH)8, Gonyerite (Mn, Mg)5(Fe+3)2Si3O10(OH)8, Nimite (Ni, Mg, Fe, Al)6AlSi3O10(OH)8, Odinite (Al, Fe+2, Fe+3, Mg)5(Al, Si)4O10(O, OH)8, Orthochamosite (Fe+2, Mg, Fe+3)5Al2Si3O10(O, OH)8, Penninite (Mg, Fe, A1)6(A1, Si)4O10(OH)8, Pannantite (Mn, A1)6(A1, Si)4O10(OH)8, Rhipidolite (prochlore) (Mg, Fe, A1)6(A1, Si)4O10(OH)8, Sudoite (Mg, Fe, Al)4 - 5(A1, Si)4O10(OH)8, Thuringite (Fe+2, Fe+3, Mg)6(Al, Si)4O10(O, OH)8. Additional exemplary minerals include the following: Periclase MgO; IMA98.065 Mg9[Si4016](OH)2; Brucite Mg(OH)2; Sellaite MgF2; Kotoite Mg3B206; Norbergite Mg3(Si04)(F,OH)2; Forsterite Mg2Si04; Ringwoodite Mg2Si04; IMA96.034 Mg7(P04)2(OH)8; Suanite Mg2B205; Wightmanite Mg5(B03)0(OH)5-2(H20); Pokrovskite Mg2(CO3)(OH)2-0.5(H2O); Fluoborite Mg3(B03)(F,OH)3; Holtedahlite Mgl2(P030H,C03)(P04)5(OH,0)6; Titanclinohumite Mg8Ti(Si04)402; Althausite Mg2(P04)(OH,F,0); Szaibelyite MgB02(OH); Magnesite MgC03; Coalingite Mgl0Fe+++2(CO3)(OH)24-2(H2O); Farringtonite Mg3(P04)2; Nepskoeite Mg4Cl(OH)7-6(H20); Chrysotile Mg3Si205(0H)4; Clinochrysotile Mg3Si205(OH)4; Lizardite Mg3Si205(OH)4; Orthochrysotile Mg3Si205(OH)4; Parachrysotile Mg3Si205(OH)4; Brugnatellite Mg6Fe+++(C03)(OH)13-4(H20); Shabynite Mg5(B03)C12(OH)5-4(H20); Hydromagnesite Mg5(C03)4(OH)2-4(H20); Chloromagnesite * MgC12; Olivine * (Mg,Fe)2Si04; Meixnerite Mg6A12(OH)18-4(H20); Dypingite Mg5(C03)4(OH)2-5(H20); Giorgiosite Mg5(C03)4(OH)2-5(H20); Kovdorskite Mg5(PO4)2(C03)(0H)2-4.5(H20); Wagnerite (Mg,Fe++)2(P04)F; Ludwigite Mg2Fe+++B05; Artinite Mg2(C03)(OH)2-3(H20); Iowaite Mg4Fe+++(OH)80Cl-2-4(H20); Clinoenstatite Mg2Si206; Enstatite Mg2Si206 Hydrotalcite Mg6A12(C03)(OH)16-4(H20); Manasseite Mg6A12(C03)(OH)16-4(H20) Chondrodite (Mg,Fe++)5(Si04)2(F,0H)2; Humite (Mg,Fe++)7(Si04)3(F,OH)2; Clinohumite (Mg,Fe++)9(Si04)4(F,OH)2; Magnesiohulsite (Mg,Fe++)2(Mg,Fe+++,Sn++++)02(B03); Korshunovskite Mg2Cl(OH)3-3.5-4(H20); Neighborite NaMgF3; Wadsleyite (Mg,Fe++)2Si04; Heneuite CaMg5(P04)3(C03)(OH); Caminite Mg7(S04)5(OH)4-(H20); Phosphoellenbergerite Mgl4(P04)6(P030H,C03)2(OH)6; Colerainite*4MgO.A1203.2Si02-5(H20); Chlorartinite Mg2(C03)Cl(OH)-3(H20); Sjogrenite Mg6Fe++2(C03)(OH)14-5(H20); Barbertonite Mg6Cr2(C03)(OH)16-4(H20); Stichtite Mg6Cr2(CO3)(OH)16-4(H20); Desautelsite Mg6Mn+++2(C03)(OH)16-4(H20); Pyroaurite Mg6Fe+++2(C03)(OH)16-4(H20); Anthophyllite []Mg7Si8022(OH)2; Cummingtonite Mg7Si8022(OH)2; Muskoxite Mg7Fe+++4O13-10(H2O); Sapphirine (Mg,Al)8(Al,Si)6O20; Nanlingite CaMg4(As03)2F4; Niningerite (Mg,Fe++,Mn)S; Sodicanthophyllite NaMg7Si8022(OH)2; Huntite CaMg3(C03)4; Sergeevite Ca2Mgl 1 (C03)9(HC03)4(OH)4-6(H20); Dozyite (Mg7A12)(Si4A12)015(0H)12 Geikielite MgTi03; Barringtonite MgC03-2(H20); Sulfoborite Mg3B2(S04)(OH)8(OH,F)2; Quintinite-2H Mg4A12(OH)12C03-4(H20); Quintinite-3T Mg4A12(OH)12C03-4(H20); Talc Mg3Si4O10(OH)2; Pinakiolite Mg2Mn+++02(B03); Takeuchiite Mg2Mn+++02(B03) Fredrikssonite Mg2(Mn+++,Fe+++)02(B03); Azoproite (Mg,Fe++)2(Fe+++,Ti,Mg)B05 ; Boracite Mg3B7013 CI; Karlite (Mg,Al)6(B03)3(OH,Cl)4; Antigorite (Mg,Fe++)3Si205(OH)4; Aspidolite NaMg3AlSi3O10(OH)2 Sodiumphlogopite NaMg3[AlSi3O10](OH)2; Sodicgedrite
NaMg6AlSi6A12022(OH)2 Pyrope Mg3A12(Si04)3 IMA99.005 Na2Mg5(P04)4-7H20 Chlormagaluminite (Mg,Fe++)4A12(OH) 12(C12,C03)-2(H20); Koenenite Na4Mg4C112-Mg5A14(OH)22 Bobierrite Mg3(P04)2-8(H20); Spadaite MgSi02(OH)2-(H20)( ) Nesquehonite Mg(HC03)(OH)-2(H20); Kies erite MgS04-(H20) Sanderite MgS04-2(H20) Phlogopite KMg3(Si3Al)O10(F,OH)2 Amesite Mg2Al(SiAl)05(OH)4 278.68; Orthopinakiolite (Mg,Mn++)2Mn+++B05 Spinel MgA1204 IMA99.002 (Mg,Mn++)2(Sb0.5Mn+++0.5)O4 Aldmotoite (Mg,Fe)Si03 Majorite Mg3(Fe,Al,Si)2(Si04)3 Khmaralite (Mg,Al,Fe)16(Al,Si,Be)12O40 1 ; Pyrocoproite * (Mg(K,Na))2P207 Garyansellite (Mg,Fe+++)3(P04)2(OH,0)-l,5(H20) Glushinskite Mg(C204)-2(H20); Tetra-ferriphlogopite KMg3Fe+++Si3O10(OH)2 Knorringite Mg3Cr2(Si04)3; Sepiolite Mg4Si6015(OH)2-6(H20) Dittmarite (NH4)Mg(P04)-(H20); Pseudosinhalite Mg2A13B209(OH); Magniotriplite (Mg,Fe++,Mn)2(P04)F Monticellite CaMgSi04; Rimkorolgite Mg5Ba(P04)4-8(H20) Gedrite []Mg5A12Si6A12022(OH)2; Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 Motukoreaite Na2Mg38A124(CO3)13(SO4)8(OH)108-56(H2O) Clinochlore (Mg,Fe++)5Al(Si3Al)O10(OH)8 Luneburgite Mg3B2(P04)2(OH)6-5(H20) Magnesiocummingtonite (Mg,Fe++)7Si8022(OH)2 Tremolite []Ca2Mg5Si8022(OH)2 Chesterite (Mg,Fe++)17Si20O54(OH)6 Pigeonite (Mg,Fe++,Ca)(Mg,Fe++)Si206; Pinnoite MgB204-3(H20) Fluor or ichterite Na(CaNa)Mg5[Si8022]F2; Hornesite Mg3(As04)2-8(H20) Clinojimthompsonite (Mg,Fe++)5Si6016(OH)2; Jimthompsonite (Mg,Fe++)5Si6016(OH)2 Potassicrichterite (K,Na)(CaNa)2Mg5[Si8022](OH,F)2 Edenite NaCa2Mg5 Si7A1022(OH)2 Potassic-fluororichterite
(K,Na)(CaNa)Mg5[Si8022]F2 Fluoro-edenite NaCa2Mg5Si7A1022(F,OH)2 Stevensite (Ca0.5,Na)0.33(Mg,Fe++)3Si4Ol 0(OH)2-n(H2O) Manganocummingtonite []Mn2Mg5Si8022(OH)2 Prochlorite * (Mg,Fe++,Al)6Al(Si2.5All .5)O10(OH)8 Gerstmannite (Mg,Mn)2ZnSi04(OH)2 Mcguinnessite (Mg,Cu)2(C03)(OH)2; Mountkeithite (Mg,Ni)l l(Fe+-b+,Cr)3(S04,C03)3.5(OH)24-l 1(H20); Biotite K(Mg,Fe++)3[AlSi3O10(OH,F)2 Newberyite Mg(P030H)-3(H20) Lansfordite MgC03-5(H20) Panasqueiraite CaMg(P04)(OH,F); Isokite CaMg(P04)F Donpeacorite (Mn,Mg)MgSi206; Krinovite NaMg2CrSi3O10 Dolomite CaMg(C03)2; Taaffeite Mg3A18Be016 Trembathite (Mg,Fe++)3B7013Cl; Efremovite (NH4)2Mg2(S04)3 Callaghanite Cu2Mg2(C03)(OH)6-2(H20); Kerolite (Mg,Ni)3Si4010(OH)2-(H2O) Magnesiocoulsonite MgV++++204; Eitelite Na2Mg(C03)2 Tochilinite 6Fe0.9S-5(Mg,Fe++)(OH)2 Welshite Ca2Sb+++++Mg4Fe+++Si4Be2O20 Baricite (Mg,Fe++)3(P04)2-8(H20); Magnesiochromite MgCr204 Starkeyite MgS04-4(H20) Preobrazhenskite Mg3B 11015(OH)9 Calciotalc CaMg2Si4010(OH)2 Haapalaite 2(Fe,Ni)S- 1.6(Mg,Fe++)(OH)2 Uklonskovite NaMg(S04)F-2(H20); Ellenbergerite Mg6TiA16Si8O28(OH)10 Magnesioferrite MgFe+++204 Eckermannite NaNa2(Mg4Al)Si8022(OH)2 Winchite [](CaNa)Mg4(AL,Fe+++)Si8022(OH)2 Preiswerkite NaMg2A13Si2O10(OH)2; IMA98.066 CaMg(V04,As04)(OH) Taeniolite KLiMg2Si4O10F2; Tainiolite KLiMg2Si4O10F2 Bischofite MgC12-6(H20); Magnesiokatophorite Na(CaNa)Mg4AlSi7A1022(OH)2 Magnesiohornblende Ca2[Mg4(Al,Fe+++)]Si7A1022(OH)2 Warwickite Mg(Ti,Fe+++,Al)(B03)0 Ferriwinchite NaCaMg4Fe+++Si8022(OH)2 Magnesium-chlorophoenicite (Mg,Mn)3Zn2(As04)(OH,0)6 Langbeinite K2Mg2(S04)3; Magnesio-arfvedsonite NaNa2(Mg4Fe++)Si8022(0H)2 Paragasite NaCa2(Mg4Al)Si6A12022(0H)2 Girvasite NaCa2Mg3(P04)2[P02(OH)2](C03)(OH)2-4(H20) Eastonite KMg2Al[A12Si2O10](OH)2; Pentahydrite MgS04-5(H20) Hannayite (NH4)2Mg3H4(P04)4-8(H20) Cannilloite CaCa2Mg4Al(Si5A13)022(OH)2 Fluorocannilloite CaCa2(Mg4Al)Si5A13022F2 Saponite (Ca/2,Na)0,3(Mg,Fe++)3(Si,Al)4O10(OH)2-4(H2O) Magnesiohastingsite NaCa2(Mg4Fe+++)Si6A12022(OH)2 Diopside CaMgSi206 Kaersutite NaCa2(Mg4Ti)Si6A12023(OH)2 Tirodite Mn++2(Mg,Fe++)5Si8022(OH)2; Magnesioanthophyllite (Mg,Fe++)7Si8022(OH)2 Adelite CaMg(As04)(OH); Magnesiochloritoid MgA12Si05(OH)2 Hauckite
(Mg,Mn++)24Znl8Fe+++3(S04)4(C03)2(OH)81( ) Tilasite CaMg(As04)F Halurgite Mg2[B405(OH)4]2-(H20) Arnhemite * (K,Na)4Mg2(P207)-5(H20); Hexahydrite MgS04-6(H20) Loughlinite Na2Mg3Si6016-8(H20) Weberite Na2MgAlF7 Ferrosilite (Fe++,Mg)2Si206; Hypersthene * (Mg,Fe++)2Si206 Wonesite (Na,K)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4 Magbasite KBa(Al,Sc)(Mg,Fe++)6Si6O20F2 Brassite Mg(As030H)-4(H20) Prismatine ([],Fe,Mg)(Mg,Al,Fe)5A14Si2(Si,Al)2(B,Si,Al)(0,OH,F)22; Mg Nissonite Cu2Mg2(P04)2(OH)2-5(H20); Schoenfliesite MgSn++++(OH)6 Struvite (NH4)MgP04-6(H20); Surina ite (Mg,Fe++)3A14BeSi3016 Phosphorrosslerite Mg(P030H)-7(H20); Epsomite MgS04-7(H20) Bradleyite Na3Mg(P04)(C03) Schaferite NaCa2Mg2(V04)3 Northupite Na3Mg(C03)2Cl Kainite MgS04-KCl-3(H20) Clinoholmquistite [](Li2Mg3A12)Si8022(OH)2 Holmquistite [](Li2Mg3A12)Si8022(OH)2 Karpinskite (Mg,Ni)2Si205(OH)2; Nitromagnesite Mg(N03)2-6(H20) Tachyhydrite CaMg2C16-12(H20); Glaucophane []Na2(Mg3A12)Si8022(OH)2 Tychite Na6Mg2(C03)4(S04); Aluminobarroisite CaNaMg3A12(Si7Al)022(OH)2 Fedorovskite Ca2(Mg,Mn)2B407(0H)6 Nyboite NaNa2(Mg3A12)Si7A1022(OH)2; Panethite (Na,Ca,K)2(Mg,Fe++,Mn)2(P04)2 Ferri-clinoholmquistite []Li2Mg3(Fe3+)2(Si8022)(OH)2 Johillerite Na(Mg,Zn)3Cu(As04)3 ; Akermanite Ca2MgSi207 Aluminomagnesiotaramite NaCaNaMg3A12[Si6A12022](OH)2; Palygorskite (Mg,Al)2Si4O10(OH)-4(H2O) Magnesioferrikatophorite Na2Ca(Mg,Fe++)4Fe+++Si7A1022(OH)2 Roedderite (Na,K)2(Mg,Fe++)5Sil2O30; Dollaseite-(Ce) CaCeMg2AlSi3011(OH,F)2 Aldzhanite * CaMgB204Cl-7(H20); Barroisite [](CaNa)Mg3AlFe+++Si7A1022(OH)2 Alumino-winchite NaCa(Mg,Fe++)4AlSi8022(OH)2 Armalcolite (Mg,Fe++)Ti205; Carnallite KMgC13-6(H20) Inderite MgB303(OH)5-5(H20); Kurnakovite MgB303(OH)5-5(H20) Vermiculite (Mg,Fe++,Al)3(Al,Si)4O10(OH)2-4(H2O) Magnesioriebeckite []Na2(Mg3Fe++2)Si8022(OH)2 Loweite Nal 2Mg7(S04) 13-15(H20) Tschermakite []Ca2(Mg3 AlFe+++)Si6A12022(OH)2; Norsethite BaMg(C03)2 Magnesiogedrite (Mg,Fe++)5A12Si6A12022(OH)2; Magnesiotaramite Na(CaNa)Mg3ALFe+++[Si6A12022](OH)2 Ferric-nyboite NaNa2Mg3Fe+++TiSi8022(OH)2 Oldhamite (Ca,Mg,Fe,Mn)S Pargasite NaCa2(Mg,Fe++)4Al(Si6A12)022(OH)2 Rosslerite Mg(As030H)-7(H20) Potassic-magnesiosadanagaite (K,Na)Ca2[Mg3(Al,Fe+++)2][Si5A13022](OH)2; Souzalite (Mg,Fe++)3(Al,Fe+++)4(P04)4(OH)6-2(H20) Actinolite Ca2(Mg,Fe++)5Si8022(OH)2 Hulsite (Fe++,Mg)2(Fe+++,Sn)02(B03); Cordierite Mg2A14Si5018 Indialite Mg2A14Si5018 Ferri-magnesiotaramite NaCaNaMg3Fe+++2[Si6A12022](OH)2 Richterite Na(CaNa)(Mg,Fe++)5[Si8022](OH)2; Baylissite K2Mg(C03)2-4(H20) Hogbomite- 15R- 18R-24R (Mg,Fe++) 1.4Ti0.3 A1408 ; Kurchatovite Ca(Mg,Mn,Fe++)B205 Clinokurchatovite Ca(Mg,Fe++,Mn)B205; Magnesiocarpholite MgA12Si206(OH)4 Brianite Na2CaMg(P04)2 Potassicpargasite (K,Na)Ca2(Mg,Fe++)5Si8022(OH,F)2 Lazulite MgA12(P04)2(OH)2 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 Arakiite (Zn,Mn++)(Mn++,Mg) 12(Fe+++,Al)2(As03)(As04)2(OH)23 Camgasite CaMg(As04)(OH)-5(H20) Gageite (Mn,Mg,Zn)42Sil6O54(OH)40; Gageite-2M (Mn,Mg,Zn)42Sil6O54(OH)40 Mcgovernite Mn9Mg4Zn2As2Si2017(OH)14 Indigirite Mg2A12(C03)4(OH)2-15(H20) Kellyite
(Mn++,Mg,Al)3(Si,Al)205(OH)4; Schertelite (NH4)2MgH2(P04)2 (H20) Chlorophoenicite (Mn,Mg)3Zn2(As04)(OH,0)6 Merwinite Ca3Mg(Si04)2; Penikisite BaMg2A12(P04)3(OH)3 Blodite Na2Mg(S04)2-4(H20); Simferite Li0.5(Mg0.5,Fe+++0.03,Mn+++0.2)2(PO4)3 Blatterite
(Mn++,Mg)35Sb3(Mn+++,Fe+++)9(B03)16032 Aksaite MgB607(OH)6-2(H20); Hungchaoite MgB405(OH)4-7(H20) Chayesite K(Mg,Fe++)4Fe+++(Sil2O30); Chelkarite CaMgB204C12-7(H20)( ) Molybdophyllite Pb9Mg9Si9024(OH)24; Kaliborite KHMg2B 12016(OH) 10-4(H2O) Balipholite BaMg2LiA13Si4012(OH,F)8; Magnesiosadanagaite
(K,Na)Ca2(Mg,Fe++,Al,Ti)5[(Si,Al)8022](OH)2; Gaspeite (Ni,Mg,Fe++)C03 Boussingaultite (NH4)2Mg(S04)2-6(H20) Rorisite (Ca,Mg)FCl Ribbeite (Mn++,Mg)5(Si04)2(OH)2 Bystromite MgSb206 Hibbingite (Fe,Mg)2(0H)3Cl Alumino-barroisite CaNa(Mg,Fe++)3A12[AlSi7022](OH)2; Manganhumite (Mn,Mg)7(Si04)3(OH)2 Leonite K2Mg(S04)2-4(H20); Overite CaMgAl(P04)2(OH)-4(H20); Admontite MgB6O10-7(H2O) Whiteite-(CaMnMg)
CaMn++Mg2A12(P04)4(OH)2-8(H20); Whiteite-(CaFeMg) Ca(Fe++,Mn++)Mg2A12(P04)4(OH)2-8(H20); Dravite NaMg3 A16(B03)3 Si6018(OH)4 Whiteite-(MnFeMg) (Mn++,Ca)(Fe++,Mn++)Mg2A12(P04)4(OH)2- 8(H20) Mcallisterite Mg2B12014(OH)12-9(H20) Liebenbergite (Ni,Mg)2Si04; Juonniite CaMgSc(P04)2(OH)-4(H20) Juanite CalOMg4A12Sil 1039-4(H20); Berzeliite (Ca,Na)3(Mg,Mn)2(As04)3 Crossite Na2(Mg,Fe++)3(Al,Fe+++)2Si8022(OH)2 Tatarskite Ca6Mg2(S04)2(C03)2C14(OH)4-7(H20) Widgiemoolthalite (Ni,Mg)5(C03)4(OH)2-4-5(H20) Segelerite CaMgFe+++(P04)2(OH)-4(H20) Picromerite K2Mg(S04)2-6(H20); Spodiophyllite * (Na,K)4(Mg,Fe++)3 (Fe+++,Al)2(Si8024); Jahnsite-(CaMnMg) CaMnMg2Fe+++2(P04)4(OH)2-8(H20) Harkerite Ca24Mg8A12(SiO4)8(BO3)6(CO3)10-2(H2O) Bayleyite
Mg2(U02)(C03)3 • 18(H20); Hydroboracite CaMgB608(OH)6-3(H20) Botryogen MgFe+++(SO4)2(OH)-7(H2O); IMA98.061
Na(LiNa)(Fe+++2Mg2Li)Si8022(OH)2 Satterlyite (Fe++,Mg)2(P04)(OH) Talmessite Ca2Mg(As04)2-2(H20) Fuenzalidaite K6(Na,K)4Na6Mgl0(SO4)12(IO3)12-12(H2O); IMA99.024 KCrMg(Si4O10)(OH)2 Leakeite NaNa2(Mg2Fe+++2Li)Si8022(OH)2; Alumino- tschermakite Ca2(Mg,Fe++)3A12(Si7Al)022(OH)2; IMA99.050 NaMg3 V6(Si6018)(B03)3(OH)4 Chromdravite NaMg3(Cr,Fe+++)6(B03)3Si6018(OH)4 Aldermanite
Mg5A112(P04)8(OH)22-32(H20)l; Kennedyite Mg(Fe+++)2Ti3O10 Chamosite (Fe++,Mg,Fe+++)5Al(Si3Al)O10(OH,O)8; Orthochamosite (Fe++,Mg,Fe+++)5 Al(Si3 A1)010(OH,O)8 Mantienneite
KMg2A12Ti(P04)4(OH)3-15(H20) Ludlamite (Fe++,Mg,Mn)3(P04)2-4(H20); Saldiaite Ca3Mg(BO3)2(CO3)-0.36(H2O) Gordonite MgA12(P04)2(OH)2-8(H20) Dorrite Ca2Mg2Fe+++4(Al,Fe+++)4Si2O20 Collinsite Ca2(Mg,Fe++)(P04)2-2(H20) Iddingsite * MgO.Fe203.3Si02-4(H20) Feruvite (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(B03)3Si6018(OH)4 Carboborite Ca2Mg(C03)2B2(OH)8-4(H20) Magnesioferritaramite Na(CaNa)(Mg,Fe++)3Fe+++2[Si6A12022](OH)2; Aegirine-augite * (Ca,Na)(Mg,Fe++,Fe+++)[Si206] ; Harrisonite Ca(Fe++,Mg)6(P04)2(Si04)2 Dannemorite Mn2(Fe++,Mg)5Si8022(OH)2; Pumpellyite-(Mg) Ca2MgA12(Si04)(Si207)(OH)2-(H20) Tosudite
Na0,5(Al,Mg)6(Si,Al)8O18(OH)12-5(H2O) IMA98.017 Mg(H20)6[Sb(OH)6]2; Kanoite (MrrH-,Mg)2Si206 Zhemchuzhnikovite NaMg(Al,Fe+++)(C204)3 -8(H20) Rabbittite
Ca3Mg3(U02)2(C03)6(OH)4-18(H20) Clinoferrosilite (Fe++,Mg)2Si206 Maghagendorfite NaMgMn(Fe++,Fe+++)2(P04)3; Inderborite CaMg[B303(OH)5]2-6(H20) Ushkovite MgFe+++2(P04)2(OH)2-8(H20) Boldyrevite * NaCaMgA13F14-4(H20) Congolite (Fe++,Mg,Mn)3B7013Cl; Ericaite (Fe++,Mg,Mn)3B7013Cl Uvite
(Ca,Na)(Mg,Fe++)3 A15Mg(B03)3 Si6018(OH,F)4 Hydrougrandite *(Ca,Mg,Fe++)3(Fe+++,Al)2(Si04)3-x(OH)4x Svyazhinite MgAl(S04)2F-14(H20); Stepanovite NaMgFe+++(C204)3-8-9(H20) Sverigeite NaMnMgSn++++Be2Si3012(OH); Aluminoceladonite
KAl(Mg,Fe++)[]Si4O10(OH)2 Borcarite Ca4MgB406(OH)6(C03)2; Vanthoffite Na6Mg(S04)4 Seelite-2 Mg(U02)(As03)x(As04) 1 -x-7(H2O)(x=0.7); Magnesiofoitite [](Mg2Al)A16(Si6018)(B03)3(OH)4 Humberstonite K3Na7Mg2(S04)6(N03)2-6(H20) Wendwilsonite Ca2(Mg,Co)(As04)2-2(H20); Sclarite (Zn,Mg,Mn++)4Zn3(CO3)2(OH)10 Wilcoxite MgAl(S04)2F-18(H20) 586.69; Magnesio-axinite Ca2MgA12B03Si4012(OH) Polyhalite K2Ca2Mg(S04)4-2(H20); Willemseite (Ni,Mg)3Si4O10(OH)2 Wiluite Cal9(Al,Mg,Fe,Ti)13(B,Al,[])5Sil8O68(O,OH)10 2,928.82; Aerinite (Ca,Na)4Mg3(Fe+++,Fe++,Al)3 [(Si,Al)042](OH)6-n(H20)(n~l 1.3); Seelite- 1 Mg[(U02)(As03)x(As04) 1 -x]2 -7(H20) Sadanagaite (K,Na)Ca2(Fe++,Mg,Al,Ti)5[(Si,Al)8022](OH)2; Magnesiumastrophyllite (Na,K)4Mg2(Fe++,Fe+++,Mn)5Ti2Si8024(0,OH,F)7 1 ,254.91 ; Aristarainite Na2MgB12O20-8(H2O) Usovite Ba2CaMgA12F14; Donathite (Fe++,Mg)(Cr,Fe+++)204 Akrochordite Mn4Mg(As04)2(OH)4-4(H20); Bredigite
Ca7Mg(Si04)4 Maufite (Mg,Ni)A14Si3013-4(H20); Osumilite-(Mg) (K,Na)(Mg,Fe++)2(Al,Fe+++)3(Si,Al)12O30; Ferri-annite K(Fe++,Mg)3(Fe+++,Al)Si3O10(OH)2 Hummerite KMgV+++++5014-8(H20) Kutnohorite Ca(Mn,Mg,Fe++)(C03)2; Ankerite Ca(Fe++,Mg,Mn)(C03)2 Landesite (Mn,Mg)9Fe+++3(P04)8(OH)3-9(H20); Triplite (Mn,Fe++,Mg,Ca)2(P04)(F,OH) Vesuvianite Cal 0Mg2A14(SiO4)5(Si2O7)2(OH)4
Magnesioaubertite (Mg,Cu)Al(S04)2CM4(H20) Zirklerite
(Fe++,Mg)9A14C118(0H)12-14(H20)( ) 1, Swartzite CaMg(U02)(C03)3-12(H20) Sahamalite-(Ce) (Mg,Fe++)Ce2(C03)4 Povondraite (Na,K)(Fe+++,Fe++)3(Fe,Mg,Al)6(B03)3Si6018(OH)4 Jervisite (Na,Ca,Fe++)(Sc,Mg,Fe++)Si206 Falcondoite (Ni,Mg)4Si6015(OH)2-6(H20) Manganese-hornesite (Mn,Mg)3(As04)2-8(H20) Ursilite *(Mg,Ca)4[(U02)4(OH)5/(Si205)5.5]T3(H20) Chelyabinskite * (Ca,Mg)3Si(OH)6(S04,C03)2-9(H20) IMA97.013 Ca8Mg(Si04)4C12 Swinefordite (Li,Ca0.5,Na)0.72(LI,Al,Mg)2.66(Si,Al)4O10(OH,F)2-2(H2O); Chloritoid (Fe++,Mg,Mn)2A14Si2O10(OH)4 Odanielite Na(Zn,Mg)3H2(As04)3; Irhtemite Ca4Mg(As030H)2(As04)2-4(H20) Ferroclinoholmquistite Li2(Fe++,Mg)3A12Si8022(OH)2 Nickelhexahydrite (Ni,Mg,Fe++)(S04)-6(H20) Chessexite (K,Na)4Ca2Mg3A18(SiO4)2(SO4)10(OH)10-40(H2O) Sklodowskite (H30)2Mg(U02)2(Si04)2-4(H20) Pickeringite MgA12(S04)4-22(H20); Slavikite NaMg2Fe+++5(S04)7(OH)6-33(H20) Howieite Na(Fe++,Mg,Al) 12(Si6017)2(0,OH) 10 Ferritschermakite Ca2(Fe++,Mg)3A12(Si7Al)022(OH)2 Retzian-(La) (Mn,Mg)2(La,Ce,Nd)(As04)(OH)4; Boyleite (Zn,Mg)S04-4(H20) Melilite (Ca,Na)2(Al,Mg,Fe++)(Si,Al)207; Merrihueite (K,Na)2(Fe++,Mg)5Sil2O30 Lannonite HCa4Mg2A14(S04)8F9-32(H20); Ferroferriwinchite CaNa(Fe++,Mg)4Fe+++[Si8022](OH)2 921.45Sodic-ferri-clinoferroholmquistite Li2(Fe++,Mg)3Fe+++3Si8022(OH)2; Saleeite Mg(UO2)2(PO4)2-10(H2O) Ferroferritschermakite Ca2(Fe++,Mg)3Fe+++2(Si7Al)022(OH)2 Picropharmacolite Ca4Mg(As030H)2(As04)2-l l(H20) Ferritaramite Na(CaNa)(Fe++,Mg)3Fe+++2[Si6A12022](OH)2 Ferrikatophorite Na2Ca(Fe++,Mg)4Fe+++(Si7Al)022(OH)2 Metanovacekite Mg(U02)2(As04)2-4- 8(H20) Protoferro-anthophyllite (Fe++,Mn++)2(Fe++,Mg)5(Si401 l)2(OH)2 Protomangano-ferro-anthophyllite (Mn++,Fe++)2(Fe++,Mg)5(Si4011)2(OH)2 Bederite ([],Na)Ca2(Mn++,Mg,Fe++)2(Fe+++,Mg++,Al)2Mn++2(P04)6-2(H20); Potassic-chlorohastingsite (K,Na)Ca2(Fe++,Mg)4Fe+++[Si6A12022](Cl,OH)2; Chvaleticeite (Mn++,Mg)S04-6(H20) Cousinite MgU2Mo2013-6(H20); Wicksite NaCa2(Fe++,Mn++)4MgFe+++(P04)6-2(H20); Quadruphite-VIII Nal4CaMgTi4(Si207)2(P04)404F2Haggertyite Ba[Fe++6Ti5Mg]019 Hawthorneite Ba[Ti3Cr4Fe4Mg]019; Merrillite-(Ca) * (Ca,[])19Mg2(P04)14 Pellyite Ba2Ca(Fe++,Mg)2Si6017; Novacekite Mg(U02)2(As04)2-12(H20) Merrillite-(Na) * Cal8Na2Mg2(P04)14 Merrillite-(Y) * Cal6Y2Mg2(P04)14 Montgomeryite Ca4MgA14(P04)6(OH)4T2(H20) Magnesium- zippeite Mg2(UO2)6(SO4)3(OH)10-16(H2O) Magnesiocopiapite
MgFe+++4(S04)6(OH)2 -20(H2O) Teruggite Ca4MgAs2B 12022(OH) 12-12(H20) Manganberzeliite (Ca,Na)3(Mn,Mg)2(As04)3 Ferribarroisite CaNa(Fe++,Mg)3Fe+++2[AlSi7022](OH)2; Ferroferribarroisite CaNa(Fe++,Mg)3Fe+++2[AlSi7022](OH)2 Sekaninaite (Fe++,Mg)2A14Si5018 Ferrocarpholite (Fe++,Mg)A12Si206(OH)4; Scorzalite
(Fe++,Mg)A12(P04)2(OH)2 Quadruphite-VII Nal4CaMgTi4[Si207]2(P04)404F2 Cassidyite Ca2(Ni,Mg)(P04)2-2(H2O) Albrechtschraufite Ca4Mg(U02)2(C03)6F2-17(H20) Nickelblodite Na2(Ni,Mg)(S04)2-4(H20) Rivadavite Na6MgB24O40-22(H2O); Kinichilite
Mg0.5[Mn++Fe+++(TeO3)3]-4.5(H2O) Homilite Ca2(Fe++,Mg)B2Si2O10; Iquiqueite K3Na4Mg(Cr++++++04)B24039(OH)-12(H20); Keystoneite Mg0.5 [Ni++Fe++(Te03)3] -4.5(H20); Zincobotryogen (Zn,Mg,Mn)Fe+++(S04)2(OH)-7(H20) Zemannite
Mg0.5[Zn++Fe+++(TeO3)3]-4.5(H2O) Huemulite Na4Mg(V10O28)-24(H2O); Nickel-boussingaultite (NH4)2(Ni,Mg)(S04)2-6(H20) 39Krasnovite Ba(Al,Mg)(P04,C03)(OH)2-(H20) Coombsite K(Mn++,Fe++,Mg)13(Si,Al)l 8042(OH)14 Hogtuvaite (Ca,Na)2(Fe++,Fe+++,Ti,Mg,Mn)6(Si,Be,Al)6O20; Wardsmithite Ca5MgB24O42-30(H2O); Georgeericksenite Na6CaMg(I03)6(Cr04)2- 12(H20) Erlianite (Fe++,Mg)4(Fe+++,V+++)2[Si6015](0,OH)8 Brandtite Ca2(Mn,Mg)(As04)2-2(H20); Stoppaniite (Fe,Al,Mg)4(Na,[])2[Be6Sil2036]-2(H20) Roselite Ca2(Co,Mg)(As04)2-2(H20)Roselite-beta Ca2(Co,Mg)(As04)2-2(H20) Philolithite Pbl206Mn(Mg,Mn)2(Mn,Mg)4(S04)(C03)4C14(OH)12; Benstonite (Ba,Sr)6(Ca,Mn)6Mg(C03)13 Ferrokinoshitalite
Ba(Fe++,Mg)(Si2A12)O10(OH,F) IMA98.039 Sr2Fe(Fe,Mg)2A14(PO4)4(OH)10; Pumpellyite-(Mn++) Ca2(Mn++,Mg)(Al,Mn+++,Fe)2(Si04)(Si207(OH)2-(H20) Osumilite-(Fe) (K,Na)(Fe++,Mg)2(Al,Fe+++)3(Si,Al)12O30 Zussmanite K(Fe++,Mg,Mn)13[AlSil7042](OH)14 Stanekite Fe+++(Mn,Fe++,Mg)(P04)0; Betpakdalite;
[Mg(H20)6]Ca2(H20) 13 [Mo++++++8As+++++2Fe+++3036(OH)] -4(H20); Jacobsite (Mn++,Fe++,Mg)(Fe+++,Mn+++)204 IMA97.012 Ca(Al,Fe++,Mg,Mn)2(As04)2(OH)2 Faheyite (Mn,Mg)Fe+++2Be2(P04)4-6(H20); Manganotychite
Na6(Mn++,Fe++,Mg)2(S04)(C03)4 Wupatkiite (Co,Mg,Ni)A12(S04)4-22(H20) Szymanskiite Hg+16(Ni,Mg)6(H30)8(C03) 12-3 (H20); Redingtonite (Fe++,Mg,Ni)(Cr,Al)2(S04)4-22(H20) Kulanite
Ba(Fe++,Mn,Mg)2A12(P04)3(OH)3; Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21038;
Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21038 Gottardiite
Na3Mg3Ca5A119Sil 170272-93(H20) Andremeyerite BaFe(Fe++,Mn,Mg)Si207;
Sturtite (Fe3+)(Mn2+,Ca,Mg)Si4010(OH)3 • 10(H2O) Vochtenite
(Fe++jMg)Fe+++[(U02)(P04)]4(OH)-12-13(H20) Oursinite
(Co,Mg)(H30)2[(U02)Si04]2-3(H20); Kastningite
(Mn++,Fe++,Mg)A12(P04)2(OH)2-8H20; Aliettite
(Mg,Fe++)3Si4O10(OH)2(Ca,Na)0.2-.3(Mg,Fe++)3(Si,Al)4O10(OH)2-4(H2O);
Alluaudite NaCaFe++(Mn,Fe++,Fe+++,Mg)2(P04)3 Alushtite
(Ca,Mg,K,Na)A115MgLi(Fe2+)(Fe3+)[Si6AlO20](OH)10-3(H2O); Amakinite
(Fe++,Mg)(OH)2; Anandite (Ba,K)(Fe++,Mg)3(Si,Al,Fe)4O10(O,OH)2 Ardennite
(Mn,Ca,Mg)4(Al,Mn,Fe,Mg)6(As,V,P,Si)(O,OH)4(SiO4) 2Si3O10(OH); Augite
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)206 Balangeroite
(Mg,Fe+++,Fe++,Mn++)42Sil6O54(OH)40; Bariumbannisterite *
(K,H3O)(Ba,Ca)(Mn++,Fe++,Mg)21(Si,Al)32O80(O,OH)16-4-12(H2O); Berthierine
(Fe++,Fe+++,Mg)2-3(Si,Al)205(OH)4 Beusite (Mn++,Fe++,Ca,Mg)3(P04)2 Bjarebyite (Ba,Sr)(Mn++,Fe++,Mg)2A12(P04)3(OH)3; Brammallite * (Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)]; Brindleyite (Ni,Mg,Fe++)2Al(SiAl)05(OH)4 Burangaite (Na,Ca)2(Fe++,Mg)2A110(PO4)8(OH,O)12-4(H2O) Canavesite Mg2(C03)(HB03)-5(H20) Carlosruizite
K6(Na,K)4Na6Mgl 0(Se++++++O4) 12(103) 12-12(H20) Carlosturanite (Mg,Fe++,Ti)21(Si,Al)12028(OH)34-(H20) Caryinite Na(Ca,Pb)(Ca,Mn)(Mn,Mg)2(As04)3 Caryopilite (Mn++,Mg,Zn,Fe++)3(Si,As)20510(OH,C1)4 Celadonite K(Mg,Fe++)(Fe-f +,Al)[Si4010](OH)2 Chabazite-Ca (Ca,Na2,K2,Sr,Mg)[A12Si4012]-6(H20) Chabazite-K (K2,Ca,Na2,Sr,Mg)[A12Si4012]-6(H20) Chabazite-Na (Na2,K2,Ca,Sr,Mg)[A12Si4012]-6(H20) Chestermanite Mg2(Fe+++,Mg,Al,Sb+++++)B0302 Chevkinite-(Ce) (Ce,La,Ca,Na,Th)4(Fe++,Mg2((Ti,Fe+++)3 Si4022; Chladniite Na2Ca(Mg,Fe++)7(P04)6 Chudobaite (Mg,Zn)5(As030H)2(As04)2- 10(H2O) Cianciulliite Mn++++(Mg,Mn++)2Zn+2(OH)10-2-4(H2O) Clintonite Ca(Mg,Al)3(A13Si)O10(OH)2 Corrensite
(Mg,Fe,Al)9(Si,Al)8O20(OH)10-n(H2O); Cuprospinel (Cu,Mg)Fe+++204 DAnsite Na21Mg(SO4)10C13; Dickinsonite
(K,Ba)(Na,Ca)5(Mn++,Fe++,Mg)14Al(P04)12(OH,F)2; Dissakisite-(Ce) Ca(Ce,La)(Mg,Fe++)(Al,Fe+++)2Si3012(OH) Eifelite KNa3Mg4Sil2O30 Ekmanite * (Fe++,Mg,Mn,Fe+++)3(Si,Al)4O10(OH)2-2(H2O); Erionite (K2,Na2,Ca,Mg)2[A14Sil4036]-15(H20) Faujasite (Na2,Ca,Mg)3.5[A17Sil7048]-32(H20) Faujasite-Ca (Ca,Na2,Mg)3.5[A17Sil7048]-32(H20) Faujasite-Mg (Mg,Na2,Ca)3.5 [A17Sil 7048]-32(H20) Fauj asite-Na
(Na2,Ca,Mg)3.5[A17Sil7048]-32(H20) Ferrierite (Na2,K2,Mg,Ca)3-5Mg[A15- 7Si27.5-31072]-18(H20) Ferrierite-K (K2,Na2,Mg,Ca)3-5Mg[A15-7Si27.5- 31072]-18(H20) Ferrierite-Mg (Mg,Na2,K2,Ca)3-5Mg[A15-7Si27.5- 31072]-18(H20) Ferrierite-Na (Na2,K2,Mg,Ca)3-5Mg[A15-7Si27.5- 31072] • 18(H20) Ferro-alluaudite NaCaFe++(Fe++,Mn,Fe+++,Mg)2(P04)3 ; Ferrowyllieite (Na,Ca,Mn)(Fe++,Mn)(Fe++,Fe+++,Mg)Al(P04)3 Filipstadite (Mn,Mg)2Sb+++++Fe+++08 Franklinphilite K4(Mn++,Mg,Fe+++,Zn)48(Si,Al)72(0,OH)216-16(H20) Galaxite (Mn,Fe++,Mg)(Al,Fe+++)204 Ganophyllite (K,Na)2(Mn,Al,Mg)8(Si,Al)12029(OH)7-8-9(H20) Glauconite (K,Na)(Fe+++,Al,Mg)2(Si,Al)4O10(OH)2 Gobbinsite Na4(Ca,Mg,K2)A16Sil0O32-12(H2O) Grandidierite (Mg,Fe++)A13(B04)(Si04)0; Griffithite * 4(Mg,Fe,Ca)0.(Al,Fe)203.5Si02-7(H20) Griphite Na4Ca6(Mn,Fe++,Mg) 19Li2A18(P04)24(F,OH)8 Hagendorfite NaCaMn(Fe++,Fe+++,Mg)2(P04)3 Hectorite Na0,3(Mg,Li)3Si4O10(F,OH)2; Hematolite (Mn,Mg,Al) 15(As03)(As04)2(OH)23 ; Hibonite (Ca,Ce)(Al,Ti,Mg) 12019 Hogbomite-4H-5H-6H- 15H (Mg,Fe++)l .4Ti0.3A14O8; Hogbomite-8H (Al,Fe-^,Fe+++,Mg,Ti,Zn)11015(OH); Holdenite (Mn,Mg)6Zn3(As04)2(Si04)(OH)8 Hydrobiotite K(Mg,Fe)6(Si,Al)8O20(OH)4-x(H2O) Illite * (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] Jarlite Na2(Sr,Na,[])14(Mg,[])2A112F64(OH,H20)4 Jianshuiite (Mg,Mn++)Mn++++307-3(H20) Joesmithite PbCa2(Mg,Fe++,Fe+++)5Si6Be2022(OH)2 Johninnesite Na2Mn++9(Mg,Mn++)7(OH)8(As04)2(Si6017)2 Johnsomervilleite Na2Ca(Mg,Fe++,Mn)7(P04)6 Kaluginite * (Mn++,Ca)MgFe+++(P04)2(OH)4(H20); Katoptrite (Mn,Mg)13(Al,Fe+++)4Sb+++++2Si2028 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2A12O10(OH)2 Konyaite Na2Mg(S04)2-5(H20); Kornerupine Mg3-4(Al,Fe+++)5.5-6(Si04,B04)5(0,OH)2-3 Kraisslite (Mn++,Mg)24Zn3Fe+++(As+++03)2(As+++++04)3(Si04)6(OH)18 Kulkeite (Mg,Fe++,Fe+++)3[(Mg,Fe++,Fe+++)2Al]Si3AlO10(OH)8/(Mg,Fe++)Si4O10(OH) 2 Langbanite (Mn,Ca,Fe,Mg)++4(Mn,Fe)9Sb+++++[016(Si04)2]; Latiumite (Ca,K)8(Al,Mg,Fe)(Si,Al) 10O25(SO4) Laws onbauerite (Mn,Mg)9Zn4(S04)2(OH)22-8(H20); Leisingite Cu(Mg,Cu,Fe,Zn)2Te++++++06-6(H20) Lennilenapeite K6- 7(Mg,Mn,Fe++,Fe+++,Zn)48(Si,Al)72(0,OH)216- 16(H20); Lindqvistite Pb2(Mn++,Mg)Fe+++l 6027; Lourenswalsite (K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6014(OH)12 Loveringite (Ca,Ce)(Ti,Fe+++,Cr,Mg)21038 Lunokite
(Mn,Ca)(Mg,Fe++,Mn)Al(P04)2(OH)-4(H20) Magnesioclinoholmquistite Li2(Mg,Fe++)3A12Si8022(OH)2; Magnesiodumortierite (Mg,Ti++++,[])<l(Al,Mg)2A14Si3018-y(OH)yBy=2-3; Magnesioholmquistite Li2(Mg,Fe++)3A12Si8022(OH)2 Magnocolumbite (Mg,Fe++,Mn)(Nb,Ta)206; Mangangordonite (Mn++,Fe++,Mg)A12(P04)2(OH)2-8(H20) Manganosegelerite (Mn,Ca)(Mn,Fe++,Mg)Fe+++(P04)2(OH)-4(H20) Mazzite K2CaMg2(Al,Si)36072-28(H20) Mendozavilite
Na(Ca,Mg)2Fe+++6(P04)2(P+++++Mo++++++l 1039)(0H,C1) 10 -33(H20); Mengxianminite * (Ca,Na)3(Fe++,Mn++)2Mg2(Sn++++,Zn)5A18029 Mimiesotaite (Fe++,Mg)3Si4O10(OH)2 Mongshanite * (Mg,Cr,Fe++)2(Ti,Zr)5012; Montdorite (K,Na)(Fe++,Mn++,Mg)2.5[Si4O10](F,OH)2 Montmorillonite (Na,Ca)0,3(Al,Mg)2Si4O10(OH)2-n(H2O) Mooreite
(Mg,Zn,Mn)15(S04)2(OH)26-8(H20) Musgravite (Mg,Fe++,Zn)2A16Be012; Niahite (NH4)(Mn++,Mg,Ca)P04-(H20) Nickenichite Na0,8Ca0,4(Mg,Fe+++,Al)3Cu0,4(AsO4)3 Nigerite-6H (Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12022(OH)2 Nimite (Ni,Mg,Fe++)5 Al(Si3 Al)010(OH)8 Nordite-(Ce) (Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6017 Nordite-(La) (La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6017 Odinite (Fe+++,Mg,Al,Fe++,Ti,Mn)2-4(Sil,8A10,2)O5(OH)4; Oldιotskite-(Mg) * Ca8(Mn++,Mg)(Mn+++,Al,Fe+++)(Si04)(Si207)(OH)2-(H20); Okhotskite-(Mn++) * Ca8(Mn++,Mg)(Mn+++,Al,Fe+++)(Si04)(Si207)(OH)2-(H20); Omphacite (Ca,Na)(Mg,Fe++,Fe+++,Al)Si206 Orthochevkinite * (Ce,La,Ca,Na,Th)4(Fe++,Mg2((Ti,Fe+++)3 Si4022 Ottrelite (Mn,Fe++,Mg)2A14Si2O10(OH)4 Parwelite (Mn,Mg)5Sb(As,Si)2012 Paulkerrite K(Mg,Mn)2(Fe+++,Al)2Ti(P04)4(OH)3-15(H20) Pehrmanite (Fe++,Zn,Mg)2A16Be012; Pengzhizhongite-24R (Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2All 0O22(OH)2 Pengzhizhongite-6H (Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2A110O22(OH)2; Perrierite (Ce,Ca,La,Nd,Th)4(Fe++,Mg)2(Ti,Al,Zr,Fe+++)2Ti2(Si207)208; Petedunnite Ca(Zn,Mn++,Fe++,Mg)Si206; Plumboferrite Pb2(Mn++,Mg)0.33Fe+++10.67O18.33 Polyphite-VII Nal 7Ca3Mg(Ti,Mn)4[Si207]2(P04)602F6 Polyphite-VIII Nal 7Ca3Mg(Ti,Mn)4[Si207]2(P04)602F6 Qandilite (Mg,Fe++)2(Ti,Fe+++,Al)04; Qingheiite Na2NaMn2Mg2(Al,Fe+++)2(P04)6; Ralstonite NaxMgxA12-x(F,OH)6-(H20); Rhodonite (Mn++,Fe++,Mg,Ca)Si03; Rhonite Ca2(Mg,Fe++,Fe+++,Ti)6(Si,Al)6O20 Roscoelite K(V,Al,Mg)2AlSi3010(OH)2 Rosemary ite (Na,Ca,Mn++)(Mn++,Fe++)(Fe+++,Fe++,Mg)Al(P04)3 ; Santafeite (Mn,Fe,Al,Mg)8(Mn,Mn)8(Ca,Sr,Na)12(VO4,AsO4)16(OH)20-8(H2O); Sarcopside (Fe++,Mn,Mg)3(P04)2 Shuiskite
Ca2(Mg,Al)(Cr,Al)2(Si04)(Si207)(OH)2-(H20); Sigismundite (Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(OH)2(P04)12 Sinhalite MgAlB04 Smolianinovite (Co,Ni,Mg,Ca)3(Fe+++,Al)2(As04)4- 11 (H20); Sobolevite Nal l(Na,Ca)4(Mg,Mn)Ti++++4(Si4012)(P04)405F3; Sobotkite (K,Ca0.5)0.33(Mg0.66A10.33)3(Si3Al)O10(OH)2-l-5(H2O); Stanfieldite Ca4(Mg,Fe++,Mn)5(P04)6 Staurolite (Fe++,Mg,Zn)2A19(Si,Al)4022(OH)2 Stilpnomelane K(Fe++,Mg,Fe+++,Al)8(Si,Al)12(0,OH)27-2(H20) Strontiowhitlockite Sr7(Mg,Ca)3(P04)6[P03(OH)] Sudoite Mg2(Al,Fe+++)3 Si3 AIO 10(OH)8 Synadelphite
(Mn,Mg,Ca,Pb)9(As+++03)(As+++++04)2(OH)9-2(H20)( ); Taneyamalite (Na,Ca)(Mn++,Mg) 12[(Si, Al)6017]2(0,OH) 10; Taramellite Ba4(Fe+++,Ti,Fe++,Mg,V+++)4(B2Si8O27)O2Clxx=0tol ; Ternovite (Mg,Ca)Nb401 l-n(H2O)wheren~10; Thadeuite (Ca,Mn++)(Mg,Fe++,Mn+++)3 (P04)2(OH,F)2; Titantaramellite Ba4(Ti,Fe+++,Fe++,Mg)4(B2Si8O27)O2ClxX=0TOl ,withTi>Fe; Torreyite (Mg,Mn)9Zn4(S04)2(OH)22-8(H20) Valleriite 4(Fe,Cu)S-3(Mg,Al)(OH)2 Volkonskoite Ca0.3(Cr+++,Mg,Fe+++)2(Si,Al)4O10(OH)2-4(H2O) Wadalite Ca6(Al,Si,Mg,Fe)7016C13 Welinite-III Mn++6(W++++++,Mg)2Si2(0,OH)14; Welinite-VIII Mn++6(W++++++,Mg)2Si02(0,OH)14 Werdingite (Mg,Fe)2A112(Al,Fe)2Si4(B,Al)4037 Wermlandite (Ca,Mg)Mg7(Al,Fe+++)2(S04)2(OH)18-12(H20) Whitlockite Ca9(Mg,Fe++)(P04)6(P030H) Wyllieite
(Na,Ca,Mn++)(Mn++,Fe++)(Fe++,Fe+++,Mg)Al(P04)3 Yakhontovite (Ca,Na,K)0,3(CuFe++Mg)2Si4O10(OH)2-3(H2O) Yimengite K(Cr,Ti,Fe,Mg)12019; Yoderite (Mg,Al,Fe+++)8Si4(O,OH)20 Yofortierite (Mn,Mg)5Si8O20(OH)2- 8-9(H20) Yuanfuliite
(Mg,Fe++)(Fe+++,Al,Mg,Ti,Fe++)(B03)0 Yushkinite Vl-xS-n(Mg,Al)(OH)2 Zanazziite (Ca,Mn)2(Mg,Fe)(Mg,Fe++,Mn,Fe+++)4Be4(P04)6(OH)4-6(H20); Wollastonite CaSi03.
Additionally, minerals mined and packaged to meet federal regulations for consumer products including ((Mg,Al)2Si4O10(OH)2), Mg3Si4O10(OH)2) are exemplary.
Additionally, polymeric materials used for ion-binding including derivatised resins of styrene and divinylbenzene, and methacrylate may be used. The derivatives include functionalized polymers having anion binding sites based on quaternary amines, primary and secondary amines, aminopropyl, diethylaminoethyl, and diethylaminopropyl substituents. Derivatives including cation binding sites include polymers functionalized with sulfonic acid, benzenesulfonic acid, propylsulfonic acid, phosphonic acid, and/or carboxylic acid moieties. Natural or synthetic zeolites may also be used or included as ion-binding materials, including, e.g., naturally occurring aluminosilicates such as clinoptilolite and calcium silicates such as wollastonite. Suitable binder materials include any polymeric material capable of aggregating the particulate materials together and maintaining this aggregation under the conditions of use. They are generally included in amounts ranging from about 10 wt% to about 99.9 wt%, more particularly from about 15 wt% to about 50 wt%, based upon the total weight of the purification material.
Suitable polymeric materials include both naturally occurring and synthetic polymers, as well as synthetic modifications of naturally occurring polymers. The polymeric binder materials generally include one or more thermoset, thermoplastic, elastomer, or a combination thereof, depending upon the desired mechanical properties of the resulting purification material.
In general, polymers melting between about 50°C and about 500°C, more particularly, between about 75°C and about 350°C, even more particularly between about 80°C and about 200°C, are suitable polymeric binders for the invention. For instance, polyolefms melting in the range from about 85°C to about 180°C, polyamides melting in the range from about 200°C to about 300°C, and fluorinated polymers melting in the range from about 300°C to about 400°C, can be particularly mentioned as suitable. Examples of types of polymers suitable for use as binders in the invention include, but are not limited to, thermoplastics, polyethylene glycols or derivatives thereof, polyvinyl alcohols, polyvinylacetates, and polylactic acids. Suitable thermoplastics include, but are not limited to, nylons and other polyamides, polyethylenes, including LDPE, LLDPE, HDPE, and polyethylene copolymers with other polyolefms, polyvinylchlorides (both plasticized and unplasticized), fluorocarbon resins, such as polytetrafluoroethylene, polystyrenes, polypropylenes, cellulosic resins, such as cellulose acetate butyrates, acrylic resins, such as polyacrylates and polymethylmethacrylates, thermoplastic blends or grafts such as acrylonitrile-butadiene-styrenes or acrylonitrile-styrenes, polycarbonates, polyvinylacetates, ethylene vinyl acetates, polyvinyl alcohols, polyoxymethylene, polyformaldehyde, polyacetals, polyesters, such as polyethylene terephthalate, polyether ether ketone, and phenol-formaldehyde resins, such as resols and novolacs. Those of skill in the art will recognize that other thermoplastic polymers can be used in the invention in an analogous manner.
Suitable thermoset polymers for use as, or inclusion in, the binder used in the invention include, but are not limited to, polyurethanes, silicones, fluorosilicones, phenolic resins, melamine resins, melamine formaldehyde, and urea formaldehyde. Suitable elasomers for use as or inclusion in, the binder used in the invention include but are not limited to natural and/or synthetic rubbers, like styrene- butadiene rubbers, neoprenes, nitrile rubber, butyl rubber, silicones, polyurethanes, alkylated chlorosulfonated polyethylene, polyolefms, chlorosulfonated polyethylenes, perfluoroelastomers, polychloroprene (neoprene), ethylene-propylene-diene terpolymers, chlorinated polyethylene, VITON® (fluoroelastomer), and ZALAK® (Dupont-Dow elastomer).
Those of skill in the art will realize that some of the thermoplastics listed above can also be thermosets, depending upon the degree of crosslinking, and that some of each may be elastomers, depending upon their mechanical properties, and that the particular categorization used above is for ease of understanding and should not be regarded as limiting or controlling. Naturally occurring and synthetically modified naturally occurring polymers suitable for use in the invention include, but are not limited to, natural and synthetically modified celluloses, such as cotton, collagens, and organic acids. Biodegradable polymers suitable for use in the invention include, but are not limited to, polyethylene glycols, polylactic acids, polyvinylalcohols, co-polylactideglycolides, and the like.
Material binders may also be chosen from those classes of materials which swell through fluid absorption. These materials include crosslinked polymers such as synthetically produced polyaciylic acids, and polyacrylamides and naturally occuring organic polymers such as celluloses. Minerals which swell with fluid absorption include bentonite and derviatives. These swellable materials bind the magnesium containing mineral particulates or fibers through pressure techniques.
In the specific embodiment of a filter material that may be sterilized the magnesium containing mineral originating from a magnesium containing silicate, magnesium oxide, magnesium hydroxide, or magnesium phosphate and GAC or bone char material are present in approximately equal amounts, with the percentage of binder material kept to a minimum. The binder used must be stable to the temperature, pressure, electrochemical, radiative, and chemical conditions presented in the sterilization process, and should be otherwise compatible with the sterilization method. Examples of binders suitable for sterilization methods involving exposure to high temperatures (such as steam sterilization or autoclaving) include cellulose nitrate, polyethersulfone, nylon, polypropylene, polytetrafluoroethylene (TEFLON®), and mixed cellulose esters. Purification materials prepared with these binders can be autoclaved when the binder polymers are prepared according to known standards. Desirably, the purification material is stable to both steam sterilization or autoclaving and chemical sterilization or contact with oxidative or reductive chemical species, as this combination of sterilizing steps is particularly suitable for efficient and effective regeneration of the purification material. Additionally, sterilization and regenerating of devices incorporating the magnesium containing mineral materials may be conducted by passing solutions of salt, acid, and/or caustic solutions through the filter.
In the embodiment of the invention wherein sterilization is at least in part conducted through the electrochemical generation of oxidative or reductive chemical species, the electrical potential necessary to generate said species can be attained by using the purification material itself as one of the electrodes. For example, the purification material, which contains polymeric binder, can be rendered conductive through the inclusion of a sufficiently high level of conductive particles, such as GAC, carbon black, or metallic particles to render a normally insulative polymeric material conductive. Alternatively, if the desired level of carbon or other particles is not sufficiently high to render an otherwise insulative polymer conductive, an intrinsically conductive polymer may be used as or blended into the binder. Examples of suitable intrinsically conductive polymers include doped polyanilines, polythiophenes, and other known intrinsically conductive polymers. These materials can be incorporated into the binder in sufficient amount to provide a resistance of less than about 1 kΩ, more particularly less than about 300 Ω.
The purification material of the present invention need not be in the form of a block, but may also be formed into a sheet or film. This sheet or film may, in a particular embodiment, be disposed on a woven or nonwoven web of, e.g., a polymer. The polymer used to form the woven or nonwoven web may be any thermoplastic or thermosetting resin typically used to form fabrics. Polyolefms, such as polypropylene and polyethylene are particularly suitable in this regard.
The efficiency of the purification material and the method for using it to reduce microbiological and chemical contaminants and the flow rate of the fluid through the material, are a function of the pore size within the block and the influent fluid pressure. At constant fluid pressure, flow rate is a function of pore size, and the pore size within the block can be regulated by controlling the size of the magnesium mineral and GAC granules. For example, a large granule size provides a less dense, more open purification material which results in a faster flow rate, and small granule size provides a more dense, less open purification material which results in a slower flow rate. A block 17 formed with relatively large magnesium mineral granules will have less surface area and interaction sites than a block formed with smaller granules. Accordingly, the purification material of large granules must be of thicker dimension to achieve equal removal of microbiological contaminants. Because these factors are controllable within the manufacturing process, the purification materials can be customized by altering pore size, block volume, block outer surface area, and geometric shape to meet different application criteria. Average pore size in a particular embodiment is kept to below several microns, and more particularly to below about one micron, to preclude passage of cysts. It should be noted that the pore size described herein does not refer to the pores within the magnesium mineral or other adsorbent or absorbent particles themselves, but rather to the pores formed within the purification material when the particles are aggregated together by the binder.
The method of making the material of the invention, in its most general aspect, involves combining the particulate magnesium containing minerals (and optional additional particulate adsorbent material(s)) with the binder material under conditions of pressure and temperature that allow at least a portion of the binder to be present in liquid form and that allow for compaction of the particulate, and then solidifying the binder around and/or between the particles. The precise nature of the production process will depend to a certain extent upon the nature of the binder material.
For example, if the binder material is supplied in the form of a liquid solution, suspension, or emulsion (e.g., in a volatile solvent), it may be contacted with the particles by dipping or spraying, and the wet particles compressed in a mold. The mold may be optionally heated to evaporate any necessary solvent. The resulting molded material is then dried to form the purification material of the invention.
If, on the other hand, the binder is a polymer resin, it will typically be mixed in pellet form with the particles of the adsorbent material, and the resulting mixture heated and extruded or molded into the desired shape. Examples of suitable particulate/binder extrusion processes and equipment are disclosed in U.S. Patent Nos. 5,189,092; 5,249,948; and 5,331,037. Other extrusion equipment and processes may also be used. Moreover, the mixture may be heated and injection molded, without the need for any extrusion. Additionally, the binder, a thermoset, may be generated through a crosslinking process that incorporates initiation by chemical processes, electrochemical processes, irradiation and through physical parameters of temperature and pressure variations.
With reference to the drawings, the invention and a mode of practicing it will now be described with regard to one particular embodiment, which meets the EPA requirements for microbiological filters. Fig. 1 illustrates a typical specific embodiment of a filtration apparatus containing the purification material of the invention, which incorporates a rigid porous block filter. A removable housing 11 is mated with a cap 12, the cap 12 having an inflow orifice 13 and an outflow orifice 14. A water supply conduit 15 is joined to the inflow orifice 13 to deliver non-treated water into the device, and a water discharge conduit 16 is joined to the outflow orifice 14 to conduct treated water from the device. Water passes into the housing 11. The pressure of the water flow forces it through the porous block filter member 17, which as shown is formed in the shape of hollow cylinder with an axial bore 18. The treated water then passes into the axial bore 18 which connects to the outflow orifice 14. Fig. 1 is provided as a representative illustration of one possible configuration. It is to be understood that other configurations where water is caused to pass through a porous filter block (which may have different geometrical shapes and/or different flow properties) are contemplated to be within the scope of the invention. The block 17 may be formed by any of a number of known methods, such as by extrusion, compression, molding, sintering, material swelling pressure or other techniques.
Figs. 2a and 2b shows two embodiments where the purification material of the invention is used in the form of a sheet or film. Fig. 2a shows purification material 1 used in connection with normal flow-through filtration, indicated by arrow 2, which represents the fluid being filtered by passage through the sheet or film 1. Fig. 2b shows purification material 1 used in connection with crossflow filtration. Fluid flowing across the filter is indicated by double-headed arrow 3, while fluid flowing through the purification material 1 is indicated by arrow 2. The cross flow fluid indicated by arrow 3 sweeps across the surface of the purification material 1, decreasing the level of particulate matter deposited thereon.
EXAMPLE 1 A cylindrical filter block 17 of the shape shown in Fig. 1 may be prepared with a material composition of approximately 42.5% magnesium silicate obtained from R.T. Vanderbilt Company, approximately 42.5% GAC obtained from KX Industries, and approximately 15%) thermoplastic binder material selected from one or more of the thermoplastics described above. The material may then be extruded at a temperature that provides a uniform mixture of magnesium silicate, GAC, and thermoplastic binder. The cylindrical or toroidally shaped block 17 is approximately 9.8 inches in length, with an outer diameter of approximately 2.5 inches and an inner diameter (the bore 18) of approximately 1.25 inches. This shape filter fits into a standard water filtration housing used in the home and industrial settings. The filter material has a resistance of about 300 Ω.
EXAMPLE 2
The filter prepared in Example 1 may be challenged by exposing it to tap water that is filtered with activated carbon and then seeded with 2.3x108 colony forming units per liter of E. coli bacteria, K. terrigena or similar species and 1.0x107 plaque forming units per liter of MS2. The seeded water is passed through the filter block 17 at a flow rate of approximately 2 liters/minute for 3 minutes, followed by collection of a 500 ml effluent sample. Bacteria and virus are assayed using standard methods. Results indicate significant microbial reduction. EXAMPLE 3
The composite prepared in Example 1 may be used to reduce a water soluble chlorine species such as hypochlorous acid in an oxidized state to a chlorine species in a reduced state
(choride). Chlorine levels of approximately 2.0 mg/L were reduced to below the detection limits of standard test strip based assays.
As described above, the material of the invention is extremely useful in the area of water purification, particularly the area of drinking water purification. Because of the extremely high efficiency with which the material of the present invention removes microorganisms from water, it meets the EPA guidelines for materials used as microbiological water purifiers. In addition to functioning as a purifier for drinking water, the material of the invention can also be used to purify water used for recreational purposes, such as water used in swimming pools, hot tubs, and spas.
As the result of the ability of the material of the invention to efficiently remove and immobilize microorganisms and other cells from aqueous solutions, it has numerous applications in the pharmaceutical and medical fields. For example, the material of the invention can be used to fractionate blood by separating blood components, e.g., plasma, from blood cells, and to remove microorganisms from other physiological fluids. The material can also be used in hospital or industrial areas requiring highly purified air having extremely low content of microorganisms, e.g., in intensive care wards, operating theaters, and clean rooms used for the therapy of immunosuppressed patients, or in industrial clean rooms used for manufacturing electronic and semiconductor equipment. The material of the invention has multiple uses in fermentation applications and cell culture, where it can be used to remove microorganisms from aqueous fluids, such as fermentation broths or process fluids, allowing these fluids to be used more efficiently and recycled, e.g., without cross-contamination of microbial strains. In addition, because the material is so efficient at removing microorganisms and at retaining them once removed, it can be used as an immobilization medium for enzymatic and other processing requiring the use of microorganisms. A seeding solution containing the desired microorganisms is first forced through the material of the invention, and then substrate solutions, e.g., containing proteins or other materials serving as enzymatic substrates, are passed through the seeded material. As these substrate solutions pass through the material, the substrates dissolved or suspended therein come into contact with the immobilized microorganisms, and more importantly, with the enzymes produced by those microorganisms, which can then catalyze reaction of the substrate molecules. The reaction products may then be eluted from the material by washing with another aqueous solution.
The material of the invention has numerous other industrial uses, e.g., filtering water used in cooling systems. Cooling water often passes through towers, ponds, or other process equipment where microorganisms can come into contact with the fluid, obtain nutrients and propagate. Microbial growth in the water is often sufficiently robust that the process equipment becomes clogged or damaged and requires extensive chemical treatment. By removing microorganisms before they are able to propagate substantially, the present invention helps to reduce the health hazard associated with the cooling fluids and the cost and dangers associated with chemical treatment programs.
Similarly, breathable air is often recycled in transportation systems, either to reduce costs (as with commercial airliners) or because a limited supply is available (as with submarines and spacecraft). Efficient removal of microorganisms permits this air to be recycled more safely. In addition, the material of the invention can be used to increase indoor air quality in homes or offices in conjunction with the air circulation and conditioning systems already in use therein. The purification material of the invention can also be used to purify other types of gases, such as anesthetic gases used in surgery or dentistry (e.g., nitrous oxide), gases used in the carbonated beverage industry (e.g., carbon dioxide), gases used to purge process equipment (e.g., nitrogen, carbon dioxide, argon), and/or to remove particles from surfaces, etc.
In each of these applications, the method of using the material of the invention is relatively simple and should be apparent to those of skill in the filtration art. The fluid or gas to be filtered is simply conducted to one side of a block or sheet of material of the invention, typically disposed in some form of housing, and forced through the material as the result of a pressure drop across the purification material. Purified, filtered fluid or gas is then conducted away from the "clean" side of the filter and further processed or used.
The invention having been thus described by reference to certain of its specific embodiments, it will be apparent to those of skill in the art that many variations and modifications of these embodiments may be made within the spirit of the invention, which are intended to come within the scope of the appended claims and equivalents thereto.

Claims

WHAT IS CLAIMED IS: 1. A purification material for fluids, wherein the material comprises an insoluble magnesium containing mineral and a binder therefore, and is in the form of a porous block or a sheet.
2. The purification material of claim 1, wherein the material is in the form of a porous block.
3. The purification material of claim 2, wherein the porous block is rigid.
4. The purification material of claim 1, wherein the material is in the form of a porous sheet.
5. The purification material of claim 4, wherein the porous sheet is rigid.
6. The purification material of claim 4, wherein the porous sheet is flexible.
7. The purification material of claim 1 , wherein at least a portion of said insoluble magnesium containing mineral is in the form of particles, fibers, or a combination thereof
8. The purification material of claim 1 , wherein at least a portion of said insoluble magnesium containing mineral is derived from magnesium containing phosphates, silicates, hydroxides, and oxides or combinations thereof.
9. The purification material of claim 1 , wherein the binder is a polymer material.
10. The purification material of claim 9, wherein the binder is a polymer melting between about 50°C and about 500°C.
11. The purification material of claim 10, wherein the polymer is stable under sterilization conditions.
12. The purification material of claim 9, wherein said binder is selected from the group consisting of thermoplastics, polyethylene glycols or a derivative thereof, polyvinyl alcohols, polyvinylacetate, and polylactic acids.
13. The purification material of claim 12, wherein the thermoplastic is selected from the group consisting of nylon, polyethylene, polyvinylchloride, fluorocarbon resins, polystyrene, polypropylene, cellulosic resins, and acrylic resins.
14. The purification material of claim 9, wherein the polymer material comprises a naturally occurring polymer.
15. The purification material of claim 9, wherein the polymer material comprises an electrically conductive polymer.
16. The purification material of claim 14, wherein the naturally occurring polymer is selected from the group consisting of natural and synthetically modified celluloses, collagens, and organic acids.
17. The purification material of claim 9, wherein the polymer material comprises a biodegradable polymer.
18. The purification material of claim 17, wherein the biodegradable polymer is a polyethyleneglycol, a polylactic acid, a polyvinylalcohol, or a co- polylactideglycolide.
19. The purification material of claim 9, wherein said binder is selected from the group consisting of gelling or absorbent polymers.
20. The purification material of claim 19, wherein said binder is selected from the group consisting of superabsorbents.
21. The purification material of claim 9, wherein said binder is selected from the group consisting polylactic acids, polyacrylamides or combinations of the polymers thereof.
22. The composite purification material of claim 9, wherein said superabsorbent comprises a material selected from the group consisting of polyacrylic acids, polyacrylamides, poly-alcohols, polyamines, polyethylene oxides, cellulose, chitins, gelatins, starch, polyvinyl alcohols and polyacrylic acid, polyacrylonitrile, carboxymethyl cellulose, alginic acids, carrageenans isolated from seaweeds, polysaccharides, pectins, xanthans, poly-(diallyldimethylammonium chloride), poly-vinylpyridine, poly-vinylbenzyltrimethylammonium salts, polyvinylacetates, and polylactic acids or a combination thereof.
23. The composite purification material of claim 9, wherein the superabsorbent comprises a material selected from the group consisting of resins obtained by polymerizing acrylic acid and resins obtained by polymerizing acrylamide.
24. The composite purification material of claim 19, wherein the polymer material comprises a naturally occurring polymer, cellulose, alginic acids, carrageenans isolated from seaweeds, polysaccharides, pectins, xanthans, starch, and combinations thereof.
25. The composite purification material of claim 19, wherein the superabsorbent material comprises an ionically charged surface.
26. The composite purification material of claim 25, wherein the superabsorbent material comprises an ionically charged surface ranging from 1- 100%) of the material surface.
27. The composite purification material of claim 24, wherein the naturally occurring polymer is selected from the group consisting of natural and synthetically modified celluloses, collagens, and organic acids.
28. The composite purification material of claim 19, wherein the superabsorbent material comprises a biodegradable polymer.
29. The composite purification material of claim 19, wherein the superabsorbent material comprises a clay or aluminosilicate material.
30. The composite purification material of claim 29, wherein the superabsorbent material comprises is bentonite.
31. The composite purification material of claim 28, wherein the naturally occurring polymer is a biodegradable polymer selected from the group consisting of a polyethyleneglycol, a polylactic acid, a polyvinylalcohol, a co-polylactideglycolide, cellulose, alginic acids, carrageenans isolated from seaweeds, polysaccharides, pectins, xanthans, starch, and combinations thereof.
32. The purification material of claim 9, wherein the purification material is in the form of a sheet and is disposed on a woven web.
33. The purification material of claim 9, wherein the purification material is in the form of a sheet and is disposed on a nonwoven web.
34. The purification material of claim 1 , wherein the binder is present in an amount ranging from about 10 wt% and about 99.9 wt% of the total weight of the purification material.
35. The purification material of claim 1, further comprising one or more additional adsorptive materials different from insoluble magnesium containing minerals.
36. The purification material of claim 35, wherein said additional adsorptive material comprises granulated activated charcoal or a non-magnesium containing apatite or a non-magnesium containing silicate.
37. The purification material of claim 36, wherein said adsorptive material comprises a non-magnesium containing apatite in the form of bone char.
38. The purification material of claim 36, wherein said adsorptive material comprises a non-magnesium containing apatite in the form of an aluminum oxide.
39. The purification material of claim 36, wherein said adsorptive material comprises a non-magnesium containing silicate in the form of calcium silicate.
40. The purification material of claim 36, wherein said magnesium containing mineral and said granulated activated charcoal or apatite are present in approximately equal amounts.
41. The purification material of claim 40, wherein said insoluble magnesium containing mineral and said granulated activated charcoal are each present in amounts of about 42.5 wt%, and said binder is present in an amount of about 15 wt%>, based upon the total weight of said purification material.
42. The purification material of claim 41 , wherein said insoluble magnesium containing mineral and said non-magnesium containing apatite are each present in amounts of about 42.5 wt%, and said binder is present in an amount of about 15 wt%, based upon the total weight of said purification material.
43. The purification material of claim 35, wherein said additional adsorptive material comprises an ion-binding material selected from the group consisting of synthetic ion exchange resins, zeolites, and phosphate minerals.
44. The purification material of claim 43, wherein the phosphate minerals are members of the phosphate class of minerals.
45. The purification material of claim 43, wherein the phosphate minerals are members of the aluminosilicate group of minerals.
46. The purification material of claim 43, wherein the synthetic ion exchange resins are functionalized styrenes, vinylchlorides, divinyl benzenes, methacrylates, acrylates, and mixtures, copolymers, and blends thereof.
47. The purification material of claim 43, wherein the natural or synthetic zeolites are silicate containing minerals known as clinoptilolite.
48. The purification material of claim 1 , further comprising one or more materials that undergo an oxidation or a reduction in the presence of water or aqueous fluid.
49. A device for filtering microbiological contaminants from water or aqueous fluid, comprising: a housing; a porous block of the purification material of claim 1.
50. The device according to claim 49, wherein the housing comprises an inlet, an outlet, and a contacting chamber therebetween, and wherein said rigid porous block is disposed within the contacting chamber, such that fluid can flow into the housing from the inlet passes through the porous block and then can flow out of the housing through the outlet.
51. A method for filtering a fluid to remove any microorganisms therefrom, comprising causing the fluid to flow through the purification material of claim 1, thereby obtaining filtered fluid.
52. The method of claim 51 , wherein said fluid is water.
53. The method of claim 52, wherein the filtered water is potable.
54. The method of claim 51 , wherein said fluid is an aqueous solution.
55. The method of claim 54, wherein said aqueous solution is blood.
56. The method of claim 54, wherein said aqueous solution is a fermentation broth.
57. The method of claim 54, wherein said aqueous solution is a recycled stream in a chemical or biological process.
58. The method of claim 57, wherein the aqueous solution is a recycled stream in a cell culturing process.
59. The method of claim 57, wherein the aqueous solution has been used in a surgical procedure.
60. The method of claim 51, wherein the fluid comprises breathable air.
61. The method of claim 51 , wherein the fluid comprises a purge gas.
62. The method of claim 61, wherein the purge gas is selected from the group consisting of 02 C02, N2, or Ar.
63. The method of claim 51 , wherein the fluid is an anesthetic gas.
64. The method of claim 63, wherein the anesthetic gas comprises nitrous oxide.
65. The method of claim 51 , further comprising regenerating said purification material by sterilization.
66. The method of claim 65, wherein said sterilization comprises exposing the purification material to elevated temperature, pressure, radiation levels, or chemical oxidants or reductants, or a combination thereof.
67. The method of claim 66, wherein said sterilization comprises autoclaving.
68. The method of claim 67, wherein said sterilization comprises electrochemical treatment.
69. The method of claim 67, wherein said sterilization comprises a combination of chemical oxidation and autoclaving.
70. The method of claim 51 , wherein said fluid is a gaseous mixture.
71. The method of claim 70, wherein the filtered gas is air.
72. The method of claim 51 , wherein said fluid is a chemically unreactive gas.
73. The method of claim 72, wherein said gas is oxygen, carbon dioxide, nitrogen, argon, or nitrogen oxides.
74. The method of claim 72, wherein said gas is used to pressurize a chamber.
75. The method of claim 72, wherein said gas is used to sparge or purge an aqueous solution for the purpose of increasing the concentration of the sparging gas in the solution.
76. The method of claim 72, wherein said gas is used to sparge or purge an aqueous solution for the purpose of decreasing the concentration of the gases initially present in the solution.
77. The method of claim 72, wherein said gas is used to remove particulate material from surfaces.
78. An immobilization and contacting medium for microorganisms, comprising magnesium containing mineral and a binder therefor, the medium in the form of a rigid, porous block or a sheet.
79. The immobilization and contacting medium of claim 78, further comprising one or more microorganisms disposed within the pores thereof.
80. The regeneration of the material of claim 1 through the use of solutions comprising salt, acid, or caustic.
81. The purification material of claim 36, wherein said adsorptive material comprises wollastonite.
EP02736485A 2001-02-06 2002-02-01 Compositions of insoluble magnesium containing minerals for use in fluid filtration Withdrawn EP1370338A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US26678401P 2001-02-06 2001-02-06
US266784P 2001-02-06
PCT/US2002/002914 WO2002076577A2 (en) 2001-02-06 2002-02-01 Compositions of insoluble magnesium containing minerals for use in fluid filtration

Publications (2)

Publication Number Publication Date
EP1370338A2 EP1370338A2 (en) 2003-12-17
EP1370338A4 true EP1370338A4 (en) 2004-07-28

Family

ID=23015985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02736485A Withdrawn EP1370338A4 (en) 2001-02-06 2002-02-01 Compositions of insoluble magnesium containing minerals for use in fluid filtration

Country Status (9)

Country Link
EP (1) EP1370338A4 (en)
JP (1) JP2004528965A (en)
KR (1) KR20040007443A (en)
CN (1) CN1527738A (en)
BR (1) BR0207026A (en)
CA (1) CA2437721A1 (en)
MX (1) MXPA03006966A (en)
WO (1) WO2002076577A2 (en)
ZA (1) ZA200305966B (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050167358A1 (en) * 2004-01-12 2005-08-04 Eric Taylor Carbon Block Filters
BE1015949A3 (en) 2004-03-15 2005-12-06 Lhoist Rech & Dev Sa Method for reduction of mercury and heavy metal smoke gas.
US7169466B2 (en) 2004-05-21 2007-01-30 The Clorox Company Multiple-component binder systems for porous composite blocks
CN1293017C (en) * 2004-10-28 2007-01-03 中国科学院上海硅酸盐研究所 Bredigites biological ceramic and preparation method and application thereof
DE102005007922A1 (en) * 2005-02-14 2006-08-24 Wp Engineering Ltd. Method and apparatus for water softening and granules and method for producing a granulate
US7673757B2 (en) * 2006-02-17 2010-03-09 Millipore Corporation Adsorbent filter media for removal of biological contaminants in process liquids
RU2316479C1 (en) * 2006-03-27 2008-02-10 Открытое акционерное общество "Научно-производственное предприятие "Радий" Water pre-conditioning method
JP2008264633A (en) * 2007-04-17 2008-11-06 Asani Japan Kk Fluid cleaning filter
KR100939586B1 (en) * 2008-03-26 2010-02-01 유희재 Water Purifying Filter to Alkalify Water and Water Purifier
RU2375403C1 (en) * 2008-08-05 2009-12-10 Андрей Николаевич ЕФИМОВ Material and method for oil and/or oil-product contamination treatment
CN101844003B (en) * 2009-03-27 2011-12-07 奇迪电器集团有限公司 Filter medium for removing copper in drinking water and preparation method thereof
EP2414503B1 (en) * 2009-04-03 2014-04-23 3M Innovative Properties Company Microorganism concentration process and device
KR101116122B1 (en) * 2010-02-03 2012-03-13 고일환 The Ceramic filter media for the removal of nonpoint pollution source
WO2011158675A1 (en) * 2010-06-15 2011-12-22 協和化学工業株式会社 Composite magnesium hydroxide, method for producing same, and adsorbent
WO2012078426A2 (en) * 2010-12-06 2012-06-14 3M Innovative Properties Company Microorganism concentration process and device
CN102475997B (en) * 2011-10-20 2013-09-11 常州亚环环保科技有限公司 Structure filter core for removing molybdenum in drinking water and preparation method of structure filter core
CN103785348B (en) * 2012-10-29 2017-03-22 日铁住金环境株式会社 Harmful-substance processing material, its manufacturing method and harmful-substance processing method
CN103977637B (en) * 2014-05-16 2015-09-23 淮安金雨阳环保科技有限公司 Edible vegetable oil produce in crude oil purification take attapulgite as the filtrate of carrier
KR101672229B1 (en) * 2015-02-24 2016-11-04 한국과학기술연구원 Filtering unit for water treatment
CN104973674B (en) * 2015-07-29 2017-01-18 石狮市新明食品科技开发有限公司 Heavy metal wastewater treatment agent
CN105541089A (en) * 2015-12-08 2016-05-04 河南昊晟城市矿产再生资源科技有限公司 Eco-friendly pumice for sponge-type city construction and preparation method thereof
CN109110896B (en) * 2018-10-30 2022-04-05 上海理工大学 Agent for removing antimony in printing and dyeing wastewater and removing method thereof
CN111303873A (en) * 2018-12-11 2020-06-19 江苏罗化新材料有限公司 Red fluorescent powder, preparation method thereof and light-emitting device
KR102027993B1 (en) * 2018-12-20 2019-10-02 김태수 Composite filter of activating natural minerals customized by health function and method for manufacturing the same
KR102240702B1 (en) * 2019-09-26 2021-04-15 김태수 Composite filter of activating natural minerals customized by health function and method for manufacturing the same
CN110835179B (en) * 2019-11-22 2022-03-08 武汉溢爱环保实业有限公司 Composite filter element faucet water purifier
KR20210089006A (en) * 2020-01-07 2021-07-15 한국원자력연구원 Ceramic filter for selective radioactive material removal and manufacturing method thereof
CN111517382A (en) * 2020-04-16 2020-08-11 武汉市秀谷科技有限公司 Lake and river water body treatment particle containing silicon-calcium-magnesium minerals and preparation method and application method thereof
CN115991496B (en) * 2023-02-22 2024-04-30 西南科技大学 Preparation method of hydrated magnesium ammonium sulfate

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180016B1 (en) * 1999-08-25 2001-01-30 Watervisions International, Inc. Microbiological water filtering
WO2001081249A1 (en) * 2000-04-21 2001-11-01 Watervisions International, Inc. Formation of composite materials with expandable matter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946603A (en) * 1988-11-17 1990-08-07 Crystal Diagnostics, Inc. Electronegatively charged blood filter and blood cell separation method
US4988440A (en) * 1989-01-30 1991-01-29 Filtercorp, Inc. Cooking oil filter
WO1996037288A1 (en) * 1995-05-26 1996-11-28 Hitachi Chemical Company, Ltd. Environment purifying material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180016B1 (en) * 1999-08-25 2001-01-30 Watervisions International, Inc. Microbiological water filtering
WO2001081249A1 (en) * 2000-04-21 2001-11-01 Watervisions International, Inc. Formation of composite materials with expandable matter

Also Published As

Publication number Publication date
WO2002076577A3 (en) 2002-12-05
EP1370338A2 (en) 2003-12-17
JP2004528965A (en) 2004-09-24
CN1527738A (en) 2004-09-08
WO2002076577A2 (en) 2002-10-03
CA2437721A1 (en) 2002-10-03
MXPA03006966A (en) 2003-11-18
BR0207026A (en) 2004-02-17
KR20040007443A (en) 2004-01-24
ZA200305966B (en) 2004-08-18

Similar Documents

Publication Publication Date Title
US20040159605A1 (en) Compositions of insoluble magnesium containing minerals for use in fluid filtration
WO2002076577A2 (en) Compositions of insoluble magnesium containing minerals for use in fluid filtration
US6833075B2 (en) Process for preparing reactive compositions for fluid treatment
AU2001253721B2 (en) Formation of composite materials with expandable matter
US6861002B2 (en) Reactive compositions for fluid treatment
US20050098495A1 (en) Purification materials and method of filtering using the same
AU773551B2 (en) Microbiological water filter
AU2001253721A1 (en) Formation of composite materials with expandable matter
US20110033337A1 (en) Apparatus and process for treating an aqueous solution containing biological contaminants
US20030173287A1 (en) Filter devices and methods of use
WO2001087777A2 (en) Filter devices and methods of use
AU2002309487A1 (en) Compositions of insoluble magnesium containing minerals for use in fluid filtration

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030908

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

A4 Supplementary search report drawn up and despatched

Effective date: 20040616

RIC1 Information provided on ipc code assigned before grant

Ipc: 7C 02F 1/28 B

Ipc: 7B 01D 46/10 B

Ipc: 7B 01D 39/08 B

Ipc: 7B 01D 39/06 A

17Q First examination report despatched

Effective date: 20070228

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20000711

R18D Application deemed to be withdrawn (corrected)

Effective date: 20070711