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DE3231717C2 - Air purifiers impregnated and for use in filters - Google Patents

Air purifiers impregnated and for use in filters

Info

Publication number
DE3231717C2
DE3231717C2 DE3231717A DE3231717A DE3231717C2 DE 3231717 C2 DE3231717 C2 DE 3231717C2 DE 3231717 A DE3231717 A DE 3231717A DE 3231717 A DE3231717 A DE 3231717A DE 3231717 C2 DE3231717 C2 DE 3231717C2
Authority
DE
Germany
Prior art keywords
gases
filters
impregnated
protection
iodide
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.)
Expired
Application number
DE3231717A
Other languages
German (de)
Other versions
DE3231717A1 (en
Inventor
Carl-Ernst van der Dr. 2400 Lübeck Smissen
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Priority to DE3231717A priority Critical patent/DE3231717C2/en
Priority to NL8300805A priority patent/NL8300805A/en
Priority to SE8301988A priority patent/SE8301988L/en
Priority to FR8306325A priority patent/FR2532188A1/en
Priority to BE0/211252A priority patent/BE897399A/en
Priority to IT09502/83A priority patent/IT1198669B/en
Publication of DE3231717A1 publication Critical patent/DE3231717A1/en
Application granted granted Critical
Publication of DE3231717C2 publication Critical patent/DE3231717C2/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D9/00—Composition of chemical substances for use in breathing apparatus
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0233—Compounds of Cu, Ag, Au
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/024—Compounds of Zn, Cd, Hg
    • B01J20/0244—Compounds of Zn
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/027—Compounds of F, Cl, Br, I
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
    • B01J20/0288—Halides of compounds other than those provided for in B01J20/046
    • 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
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • 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
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • 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
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3289—Coatings involving more than one layer of same or different nature

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)

Abstract

Als Luftreinigungsmittel verwendete Aktivkohle und ähnliche Trägermaterialien erhalten durch eine Imprägnierung eine gute Abscheideleistung für verschiedene schädliche Gase. Dabei ist ein Schutz gegen ein möglichst weites Spektrum schädlicher Gase erwünscht. Es sind Luftreinigungsmittel gegen saure Gase (B nach DIN 3181) und solche gegen alkalische Gase (K nach DIN 3181) bekannt. Das Luftreinigungsmittel nach der Erfindung besitzt durch die Imprägnierung mit dem Iodid eines aminbildenden Metalls, insbesondere Zinkiodid, eine hohe Abscheideleistung sowohl gegen stark saure Gase wie auch gegen alkalische Gase. Es schützt damit gleichermaßen gegen saure Gase (B) wie gegen Ammoniak (K). Eine bevorzugte Verwendung ist der Bau kleiner, leistungsfähiger Einschichtenfilter als Atemschutzfilter mit Schutz (B/K) sowie die Herstellung von Filtern für Lüftungsanlagen. A) liegt. Die Summenspannung am Ausgang der Additionsschaltung ist dann eine koActivated charcoal and similar carrier materials used as air purifying agents are impregnated to achieve good separation performance for various harmful gases. Protection against the widest possible spectrum of harmful gases is desirable. There are air cleaning agents against acidic gases (B according to DIN 3181) and those against alkaline gases (K according to DIN 3181) known. Due to the impregnation with the iodide of an amine-forming metal, in particular zinc iodide, the air cleaning agent according to the invention has a high separation efficiency against both strongly acidic gases and against alkaline gases. It protects against acid gases (B) as well as against ammonia (K). A preferred use is the construction of small, high-performance single-layer filters as respiratory protection filters with protection (B / K) and the production of filters for ventilation systems. A) lies. The total voltage at the output of the addition circuit is then a ko

Description

Die Erfindung betrifft ein Luftreinigungsmittel zur Verwendung in Filtern auf der Basis von mit Zinkiodid imprägnierter Aktivkohle.The invention relates to an air cleaner for use in filters based on zinc iodide impregnated activated carbon.

Aktivkohle als Luftreinigungsmittel wird zur Reinigung von Atmungsluft von schädlichen Gasen in unterschiedlicher Weise, so z. B. in von den Menschen getragenen Atemschutzfiltern oder in Filtern von Lüftungsanlagen verwandt. Zur Erreichung guter Abscheideleistung wird die Aktivkohle in unterschiedlicher Weise imprägniert. So sind imprägnierte Aktivkohlen zum Abscheiden saurer Gase und alkalischer Gase bekannt DIN 3181 legt den Schutzumfang gegen die unterschiedlichen Schadstoffe fest So bieten u. a. die Atemfilter mit dem Kennbuchstaben B Schutz gegen saure Gase und die mit dem Buchstaben K. Schutz gegen Ammoniak. Ein Atemfilter, das Schutz gegen eine Mischung B und K gibt verlangt eine Präparatfüllung mit diesem doppelten Schutz. Er wird meist durch zwei Schichten erreicht mit einer Schicht eines Präparates gegen saure Gase und einer Schicht gegen alkalische Gase (Ammoniak). Derartige Filter haben den Nachteil, daß sie sehr volurtMiös, schwer und kostspielig sind und einen hohen Luftwiderstand aufweisen.Activated carbon as an air purifier is used to purify breathing air from harmful gases in different ways Way, so z. B. in respiratory protection filters worn by humans or in filters of ventilation systems related. In order to achieve good separation efficiency, the activated carbon is used in different ways impregnated. Impregnated activated carbons for separating acidic gases and alkaline gases are known DIN 3181 defines the scope of protection against the various pollutants. the respiratory filters with the code letter B protection against acid gases and those with the letter K. protection against ammonia. A respiratory filter that provides protection against a mixture B and K requires a preparation filling with this double protection. It is usually achieved by two layers with one layer of an anti-acidic preparation Gases and a layer against alkaline gases (ammonia). Such filters have the disadvantage that they are very volurty, heavy and expensive and are high Have air resistance.

Eine bekannte Absorptionsmasse für Gasfilter, insbesondere solche für Atmungszwecke, ist zugleich gegen Schwefelwasserstoff und Ammoniak wirksam. Sie besteht aus aktiver Kohle, auf die Kupfer(I)-Chlorid aufgebracht ist Während dabei die Reaktion mit Ammoniak in herkömmlicher Weise erfolgt, kommt es mit Schwefelwasserstoff zur Bildung von Salzsäure als Endprodukt. Diese soll in der Aktivkohle adsorbiert werden (DE-PS 5 30 381). Da die Bindungskraft der Aktivkohle durch Imprägnierungen herabgesetzt wird, ist das Auftreten von Salzsäure bedenklich, die je nach Filterbelastung in die Einatemluft gelangen könnte, so daß möglicherweise nur ein Atemgift in ein anderes umgewandelt würde.A known absorption mass for gas filters, in particular those for respiratory purposes, is also effective against hydrogen sulfide and ammonia. she consists made of active carbon to which copper (I) chloride is applied While the reaction with ammonia takes place in a conventional manner, it comes with hydrogen sulfide for the formation of hydrochloric acid as the end product. This should be adsorbed in the activated carbon (DE-PS 5 30 381). Since the binding force of the activated carbon is reduced by impregnation, the occurrence is of hydrochloric acid, which could get into the inhaled air depending on the filter load, so that possibly only one breath poison would be converted into another.

Ein bekanntes Verfahren zur Reinigung von flüchtige Basen und schwächere Säuren enthaltender Atemluft verwendet als wirksame Filtersubstanz basische Schwermetallverbindungen, die mit Ammoniak und flüchtigen Basen unter Bildung von Komplex- oder Doppelsalzen reagieren. Sie werden allein odei mit Trägerstoffen verwendet. Als basische Verbindungen werden angeführt das Hydroxid, das basische Carbonat, basische Sulfat und basische Chlorid des Kupfers (DE-PS 7 10 617). Alle aufgeführten Verbindungen nehmen stark saure Gase, wie z. B. Chlor aus der zu reinigenden Luft nur in geringem Maße auf. A known method for cleaning breathable air containing volatile bases and weaker acids uses basic heavy metal compounds as an effective filter substance, which react with ammonia and volatile bases to form complex or double salts. They are used alone or with carriers. The basic compounds listed are the hydroxide, the basic carbonate, the basic sulfate and the basic chloride of copper (DE-PS 7 10 617). All listed compounds take strongly acidic gases, such as B. chlorine from the air to be cleaned only to a small extent.

Eine bekannte imprägnierte Aktivkohle für die Verwendung als Luftreinigungsmittel ist geeignet, radioaktives Methyliodid neben sauren Gasen aus der Luft zu entfernen. Sie wird in der Weise hergestellt, daß ein Träger in einem ersten Arbeitsgang mit Kupfercarbonat und Natriumdichromat getränkt und nach Trocknung in einem zweiten Arbeitsgang mit Kaliumiodid getränkt und getrocknet wird. Bei dieser Art der Imprägnierung liegen die Schwermetalle und das Iod in einer derartigen Form auf dem Träger vor, daß die bestimmungsgemäße Aufgabe, nämlich die Bindung von sauren Gasen und von radioaktivem Methyliodid, gut erfüllt wird (DE OS 27 57 576). Ammoniak und flüchtige Amine werden aber nur unvollkommen gebunden.A known impregnated activated carbon for use as an air purifier is suitable for radioactive To remove methyl iodide from the air in addition to acidic gases. It is made in such a way that a Carrier soaked in a first step with copper carbonate and sodium dichromate and after drying is soaked in a second step with potassium iodide and dried. With this type of impregnation the heavy metals and the iodine are present on the carrier in such a form that the intended Task, namely the binding of acid gases and radioactive methyl iodide, well done is (DE OS 27 57 576). Ammonia and volatile amines are only imperfectly bound.

Aus der DE-OS 30 13 256 ist eine mit Metallen belegte Aktivkohle bekanntgeworden, welche unempfindlichFrom DE-OS 30 13 256 an activated carbon coated with metals has become known, which is insensitive

ίο gegenüber Wasserdampf ist und durch Katalysatorgifte nur unwesentlich beeinflußt wird. Zum Zwecke einer spezifischen Erhöhung der Adsorptionsfähigkeit der Aktivkohle ist vorgesehen, diese beispielsweise mit einer wäßrigen Lösung von Zinkiodid zu imprägniereil.ίο is against water vapor and through catalyst poisons is only marginally affected. For the purpose of a specific increase in the adsorption capacity of the Activated charcoal is intended to be impregnated, for example, with an aqueous solution of zinc iodide.

Imprägnierungen mit anderen Metallsalzen sind ebenfalls möglich. Die Auswahl des geeigneten Metalls richtet sich nach dem beabsichtigten Einsatz der imprägnierten Aktivkohle, um gezielt eine bestimmw gasförmige oder auch flüssige Komponente aus einem entsprechenden Gemisch mit möglichst hoher Abscheideleistung herauszufiltem.Impregnation with other metal salts is also possible. The selection of the appropriate metal is aimed according to the intended use of the impregnated activated carbon to target a specific gaseous or also liquid components from a corresponding mixture with the highest possible separation efficiency to filter out.

Die Aufgabe der vorliegenden Erfindung wird somit darin gesehen, ein Luftreinigungsmittel von mit Zinkiodid imprägnierter Aktivkohle dahingehend zu verbessern, daß es in der Lage ist neben schwachen Säuren, wie Schwefelwasserstoff oder Ammoniak, auch stark saure Gase, wie z. B. Chlor, aufzunehmen. Dabei soll das Luftreinigungsmittel einen einfachen Einschichtenaufbau für ein entsprechendes Filter ermöglichen.The object of the present invention is thus seen to be an air purifier containing zinc iodide to improve impregnated activated carbon in such a way that it is able, in addition to weak acids, such as hydrogen sulfide or ammonia, even strongly acidic gases such. B. chlorine to include. That should Air cleaning agents allow a simple layer structure for a corresponding filter.

Die Lösung der Aufgabe erfolgt dadurch, daß die Aktivkohle zusätzlich mit elementarem Jod oder positiv geladenem Jod imprägniert istThe object is achieved by adding elemental iodine or positive to the activated carbon charged iodine is impregnated

Diese zusätzliche Imprägnierung erhöht die Abscheideleistung von Schwefeldioxid und Schwefelwasserstoff erheblich. Positiv geladenes Jod dient dabei als Oxidationsmittel für Schwefeldioxid und Schwefelwasserstoff. Das Luftreinigungsmittel ist alterungsbeständig, die Herstellung eines Filters unier Verwendung dieses Luftreinigungsmittels ist als Kombinationsfilter für Schadstoffe B (saure Gase) und K (Ammoniak) gleichermaßen geeignet, so daß nach wie vor ein Einschichtenaufbau des Filters mit entsprechend geringen Dimensionen ausreicht This additional impregnation increases the separation efficiency of sulfur dioxide and hydrogen sulfide considerable. Positively charged iodine serves as an oxidizing agent for sulfur dioxide and hydrogen sulfide. The air cleaning agent is resistant to aging, the production of a filter using this air cleaning agent is a combination filter for pollutants B (acid gases) and K (ammonia) in equal measure suitable, so that a single-layer structure of the filter with correspondingly small dimensions is still sufficient

Die Herstellung einer imprägnierten Aktivkohle nach der Erfindung wird anhand eines Beispiels beschrieben: Aktivkohle wird mit einer Lösung von Kaliumiodid und Jod imprägniert und getrocknet. Dann wird handelsübliches Zinkcarbonat in wäßriger Iodwasserstofflösung bis zur beginnenden Trübung der Lösung gelöst. Dann wird granulierte Aktivkohle mit einfacher oder mehrmaliger Imprägnierung auf einen Gehalt an Zinkiodid von 16 Gewicntsprozent gebracht. Nach der Imprägnierung wird der Wassergehalt durch vorsichtige Trocknung im Vakuum bei 500C auf 5 Gewichtsprozent eingestellt.The production of an impregnated activated carbon according to the invention is described using an example: Activated carbon is impregnated with a solution of potassium iodide and iodine and dried. Commercially available zinc carbonate is then dissolved in aqueous hydrogen iodide solution until the solution starts to become cloudy. Granulated activated carbon is then impregnated once or several times to a zinc iodide content of 16 percent by weight. After impregnation, the water content is adjusted by careful drying under vacuum at 50 0 C to 5 weight percent.

Danach kann die imprägnierte Aktivkohle als Füllmaterial für Atemschutzfilter zum Schutz gegen saure und alkalische Gase verwendet werden.Then the impregnated activated carbon can be used as a filler for respiratory filters to protect against acidic and alkaline gases can be used.

Claims (1)

Patentanspruch:Claim: Luftreinigungsmittel zur Verwendung in Filtern auf der Basis von mit Zinkiodid imprägnierter Aktivkohle, dadurch gekennzeichnet, daß die Aktivkohle zusätzlich mit elementarem Jod oder positiv geladenem Jod imprägniert istAir purification agent for use in filters based on activated carbon impregnated with zinc iodide, characterized in that the activated carbon also contains elemental iodine or positive charged iodine is impregnated
DE3231717A 1982-08-26 1982-08-26 Air purifiers impregnated and for use in filters Expired DE3231717C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE3231717A DE3231717C2 (en) 1982-08-26 1982-08-26 Air purifiers impregnated and for use in filters
NL8300805A NL8300805A (en) 1982-08-26 1983-03-04 AIR PURIFIER, FILTERS AND FILTERS.
SE8301988A SE8301988L (en) 1982-08-26 1983-04-11 IMPREGNATED AIR CLEANER FOR USE IN FILTER
FR8306325A FR2532188A1 (en) 1982-08-26 1983-04-13 Air purifying prod. for filters
BE0/211252A BE897399A (en) 1982-08-26 1983-07-28 IMPREGNATED AIR CLEANING PRODUCT FOR USE IN FILTERS
IT09502/83A IT1198669B (en) 1982-08-26 1983-08-24 AIR PURIFIER, IMPREGNATED AND FOR USE IN FILTERS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3231717A DE3231717C2 (en) 1982-08-26 1982-08-26 Air purifiers impregnated and for use in filters

Publications (2)

Publication Number Publication Date
DE3231717A1 DE3231717A1 (en) 1984-03-01
DE3231717C2 true DE3231717C2 (en) 1986-04-24

Family

ID=6171713

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3231717A Expired DE3231717C2 (en) 1982-08-26 1982-08-26 Air purifiers impregnated and for use in filters

Country Status (6)

Country Link
BE (1) BE897399A (en)
DE (1) DE3231717C2 (en)
FR (1) FR2532188A1 (en)
IT (1) IT1198669B (en)
NL (1) NL8300805A (en)
SE (1) SE8301988L (en)

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Publication number Priority date Publication date Assignee Title
DE3701695A1 (en) * 1987-01-22 1988-08-04 Draegerwerk Ag PROTECTIVE HOOD FOR EMERGENCY
DE3730922A1 (en) * 1987-09-15 1989-04-06 Hoelter Heinz Chemisorption composition for eliminating odours and smoke residues, preferably tobacco smoke

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KR0148793B1 (en) * 1989-06-23 1998-10-15 죠셉 에이. 피세테 Chromium free impregnated activated carbon for absorption of toxic gases and or vapors
EP0526077A1 (en) * 1991-07-22 1993-02-03 Takeda Chemical Industries, Ltd. Activated carbon honeycombs and applications thereof
AU3141497A (en) * 1997-01-22 1998-08-07 Minnesota Mining And Manufacturing Company Multi-gas impregnated sorbent
US6224655B1 (en) * 1998-11-03 2001-05-01 Pierre Messier Biostatic air filter
DE19931371A1 (en) * 1999-07-08 2001-01-11 Mhb Filtration Gmbh & Co Kg Filter material for gas filtration with biocidal properties
US7004990B2 (en) 2003-06-26 2006-02-28 3M Innovative Properties Company Broad spectrum filter system including tungsten-based impregnant and being useful for filtering contaminants from air or other gases
AU2009288177B2 (en) 2008-09-02 2012-07-19 3M Innovative Properties Company Ammonia-free gaseous air filter

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DE556608C (en) * 1929-06-01 1932-08-16 Draegerwerk Ag Process for the production of gas absorption compounds for breathing filters
DE620387C (en) * 1929-11-25 1935-10-21 Rech S Et D Expl S Petrolifere Process for drying gases and gas mixtures
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DE2507672C3 (en) * 1975-02-22 1980-10-09 Laboratorium Fuer Adsorptionstechnik Gmbh, 6000 Frankfurt Process for impregnating activated carbon
DE2603807C3 (en) * 1976-02-02 1982-01-07 Laboratorium für Adsorptionstechnik GmbH, 6000 Frankfurt Process for removing mercury from gases
DE2757576C2 (en) * 1977-12-23 1984-03-08 Drägerwerk AG, 2400 Lübeck Impregnated activated carbon to remove acidic, catalytically decomposable and chemically bound pollutants from the air
DE3013256C2 (en) * 1980-04-03 1988-06-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Process for the production of highly specific activated carbon, the carbon obtained in the process and its use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701695A1 (en) * 1987-01-22 1988-08-04 Draegerwerk Ag PROTECTIVE HOOD FOR EMERGENCY
DE3730922A1 (en) * 1987-09-15 1989-04-06 Hoelter Heinz Chemisorption composition for eliminating odours and smoke residues, preferably tobacco smoke

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Publication number Publication date
IT8309502A0 (en) 1983-08-24
NL8300805A (en) 1984-03-16
FR2532188B1 (en) 1985-04-05
SE8301988D0 (en) 1983-04-11
BE897399A (en) 1983-11-14
SE8301988L (en) 1984-02-27
DE3231717A1 (en) 1984-03-01
IT1198669B (en) 1988-12-21
FR2532188A1 (en) 1984-03-02

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