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WO1989003805A3 - Production of low-fluorine calcium phosphate and phosphoric acid and of silica - Google Patents

Production of low-fluorine calcium phosphate and phosphoric acid and of silica Download PDF

Info

Publication number
WO1989003805A3
WO1989003805A3 PCT/US1988/003746 US8803746W WO8903805A3 WO 1989003805 A3 WO1989003805 A3 WO 1989003805A3 US 8803746 W US8803746 W US 8803746W WO 8903805 A3 WO8903805 A3 WO 8903805A3
Authority
WO
WIPO (PCT)
Prior art keywords
fluorine
phosphoric acid
granules
silica
low
Prior art date
Application number
PCT/US1988/003746
Other languages
French (fr)
Other versions
WO1989003805A2 (en
Inventor
Timothy W Tobiason
Original Assignee
Designer Premixes 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 Designer Premixes Inc filed Critical Designer Premixes Inc
Publication of WO1989003805A2 publication Critical patent/WO1989003805A2/en
Publication of WO1989003805A3 publication Critical patent/WO1989003805A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
    • C04B20/061—Expanding clay, perlite, vermiculite or like granular materials in rotary kilns
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/20—Inorganic substances, e.g. oligoelements
    • A23K20/26—Compounds containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/234—Purification; Stabilisation; Concentration
    • C01B25/237—Selective elimination of impurities
    • C01B25/2372—Anionic impurities, e.g. silica or boron compounds
    • C01B25/2375—Fluoride or fluosilicate anion
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
    • C01B25/328—Defluorination during or after the preparation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/36—Inorganic materials not provided for in groups C04B14/022 and C04B14/04 - C04B14/34
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Zoology (AREA)
  • Civil Engineering (AREA)
  • Animal Husbandry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fertilizers (AREA)
  • Silicon Compounds (AREA)

Abstract

A process for producing low-fluorine calcium phosphate granules comprises a special roasting process in which the granules are heated to a temperature sufficient to expand the granules and evolve volatile fluorine compounds. The product resulting from the process according to the invention has a higher proportion of phosphorus than the granules from which it is produced, mixes well with conventional feeds, and exhibits good biological availability. The product is also useful as insulation. Processes are also disclosed for reducing the fluorine content of the phosphoric acid used to make the granules. The fluorine content of phosphoric acid can be reduced by precipitating fluorine salts from already-produced phsophoric acid in the presence of hydrochloric acid or by digesting phosphate rock with recycled phosphoric acid and hydrochloric acid to produce low-fluorine phosphoric acid directly. In either embodiment, reactive silica is used. Low-cost reactive silica can be made from vitreous crystalline silica by using the roasting process, eliminating the need for costly diatomaceous silica.
PCT/US1988/003746 1987-10-30 1988-10-28 Production of low-fluorine calcium phosphate and phosphoric acid and of silica WO1989003805A2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11471387A 1987-10-30 1987-10-30
US114,713 1987-10-30
US16856788A 1988-03-07 1988-03-07
US168,567 1988-03-07
USNOTFURNISHED 1994-10-25

Publications (2)

Publication Number Publication Date
WO1989003805A2 WO1989003805A2 (en) 1989-05-05
WO1989003805A3 true WO1989003805A3 (en) 1989-10-19

Family

ID=26812489

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/003746 WO1989003805A2 (en) 1987-10-30 1988-10-28 Production of low-fluorine calcium phosphate and phosphoric acid and of silica

Country Status (2)

Country Link
AU (1) AU2809589A (en)
WO (1) WO1989003805A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282816A (en) * 1991-09-20 1994-02-01 Milres Corporation Apparatus for subligamentous endoscopic transverse carpal ligament release surgery
US6221424B1 (en) * 1992-08-28 2001-04-24 Paul Kalmbach Granular feed nutrient supplements
WO2017051399A1 (en) 2015-09-25 2017-03-30 Clean World Technologies Ltd. Producing calcium phosphate compositions
WO2021035058A1 (en) * 2019-08-21 2021-02-25 Jesa Technologies Llc Method for removing cadmium in the manufacture of phosphoric acid
CN116374971A (en) * 2023-03-07 2023-07-04 湖北鄂中生态农业科技有限公司 Method for purifying phosphoric acid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151936A (en) * 1959-12-29 1964-10-06 Smith Doughlass Company Inc Process for the defluorination of phosphates
DE1667435B1 (en) * 1967-12-19 1971-09-16 Kalk Chemische Fabrik Gmbh PROCESS FOR PREPARING LOW FLUOROUS PHOSPHORIC ACID
US4088738A (en) * 1975-11-24 1978-05-09 United States Gypsum Company Process for producing phosphoric acid using mixed acid feed and a dicalcium phosphate intermediate
EP0134732A1 (en) * 1983-07-21 1985-03-20 Timac S.A. Process for producing purified phosphoric acid, device therefor and product obtained

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151936A (en) * 1959-12-29 1964-10-06 Smith Doughlass Company Inc Process for the defluorination of phosphates
DE1667435B1 (en) * 1967-12-19 1971-09-16 Kalk Chemische Fabrik Gmbh PROCESS FOR PREPARING LOW FLUOROUS PHOSPHORIC ACID
US4088738A (en) * 1975-11-24 1978-05-09 United States Gypsum Company Process for producing phosphoric acid using mixed acid feed and a dicalcium phosphate intermediate
EP0134732A1 (en) * 1983-07-21 1985-03-20 Timac S.A. Process for producing purified phosphoric acid, device therefor and product obtained

Also Published As

Publication number Publication date
AU2809589A (en) 1989-05-23
WO1989003805A2 (en) 1989-05-05

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