DE3001657A1 - Highly active and voluminous silver oxide catalyst prodn. - by deposition silver oxide on magnesium oxide, useful in detoxification powder for chemical warfare agent - Google Patents

Highly active and voluminous silver oxide catalyst prodn. - by deposition silver oxide on magnesium oxide, useful in detoxification powder for chemical warfare agent

Info

Publication number
DE3001657A1
DE3001657A1 DE19803001657 DE3001657A DE3001657A1 DE 3001657 A1 DE3001657 A1 DE 3001657A1 DE 19803001657 DE19803001657 DE 19803001657 DE 3001657 A DE3001657 A DE 3001657A DE 3001657 A1 DE3001657 A1 DE 3001657A1
Authority
DE
Germany
Prior art keywords
silver oxide
oxide
highly active
voluminous
catalyst
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Withdrawn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
DE19803001657
Other languages
German (de)
Inventor
Geb Hofmann Lettko
Herbert Lettko
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.)
Aerochem Herbert Lettko & Co Kg 6501 Ober-Ol GmbH
Original Assignee
AEROCHEM HERBERT LETTKO KG
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 AEROCHEM HERBERT LETTKO KG filed Critical AEROCHEM HERBERT LETTKO KG
Priority to DE19803001657 priority Critical patent/DE3001657A1/en
Publication of DE3001657A1 publication Critical patent/DE3001657A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • A62D3/38Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by oxidation; by combustion
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48Silver or gold
    • B01J23/50Silver
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/02Chemical warfare substances, e.g. cholinesterase inhibitors

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

In the prodn, of a highly active and highly voluminous Ag oxide (I) catalyst by depositing (I) on MgO with a surface area of 150-170 sq.m/g by the BET method and 55,000-70,000 sq.cm/g by the Blaine method, (I) is deposited on MgO with a min. surface area of 62.5 sq.m/g. The catalyst is used as additive for detoxification powder (in conjunction with Ca hypochlorite or bleaching powder) for chemical warfare agents. An ca. 5.33 angstrom colloidal (I) layer is obtd. on the surface of the MgO.

Description

des Herrn Herbert Lettko, 6500 Mainz-Drais,of Mr. Herbert Lettko, 6500 Mainz-Drais,

In den Obstanlagen 10 der Frau Marie Lettko, geb. Hofmann, 6500 Mainz-Drais, In den Obstanlagen 10 Verfahren zur Herstellung eines hochaktiven und hochvoluminösen Silberoxidkatalysators. In the orchards 10 of Mrs. Marie Lettko, née Hofmann, 6500 Mainz-Drais, In the orchards 10 method for producing a highly active and high-volume Silver oxide catalyst.

Die Erfindung betrifft ein Verfahren zur Herstellung eines heterogenen, hochvoluminösen, oligodynamischen, kolloidalen Silberkatalysators als Zusatzstoff eines Entgiftungspuders für die Entgiftung von chemischen Kampfstoffen.The invention relates to a method for producing a heterogeneous, high-volume, oligodynamic, colloidal silver catalyst as an additive a detox powder for the detoxification of chemical warfare agents.

Unter Katalyse versteht man die Erscheinung, daß chemische Reaktionen in ihrer Geschwindigkeit gesteigert werden durch Zusatz von Stoffen, die durch die Reaktion nicht verbraucht werden, also scheinbar durch ihre bloße Gegenwart wirken. Man bezeichnet diese Stoffe als Katalysatoren. Besonders augenfällig tritt die Wirkung der Katalysatoren bei solchen Reaktionen zutage, die in Abwesenheit des Katalysators überhaupt nicht mit merklicher Geschwindigkeit verlaufen.Catalysis is the phenomenon that chemical reactions can be increased in their speed by adding substances, which by the Reaction not to be consumed, so apparently by their mere Work in the present. These substances are known as catalysts. Particularly noticeable the effect of the catalysts becomes apparent in such reactions that in their absence of the catalyst do not proceed at any noticeable speed.

Da der Katalysator, um wirksam zu werden, mit den Molekülen, deren Reaktion er beschleunigen soll, in Berührung kommen muß, ist die katalytische Reaktionsbeschleunigung natürlich auch von der Menge des Katalysators abhängig. Denn je größer die Menge des Katalysators ist, umso mehr Moleküle des Substrats gelangen in der Zeiteinheit durch Diffusion mit ihm in Berührung.As the catalyst, in order to be effective, with the molecules whose The reaction to accelerate, must come into contact, is the catalytic acceleration of the reaction of course also dependent on the amount of catalyst. Because the bigger the crowd of the catalyst, the more molecules of the substrate arrive in the unit of time in contact with it by diffusion.

Im Falle der homogenen Katalyse ist die Zahl der Moleküle des Substrats, die in der Zeiteinheit mit dem Katalysator in Berührung kommen, von der Konzentration des Katalysators abhängig, IM FALLE DER "HETEROGENEN KATALYSE" VON SEINER OBERFLÄCHE.In the case of homogeneous catalysis, the number of molecules of the substrate that come into contact with the catalyst in the unit of time depends on the concentration depending on the catalyst, IN THE CASE OF "HETEROGENIC CATALYSIS" ON ITS SURFACE.

Ein gegebener Kontaktstoff ist daher umso wirksamer, je feiner bei gegebener Menge sein Verteilungsgrad ist.A given contact substance is therefore all the more effective, the finer at given amount is its degree of distribution.

Hierdurch erklärt sich die besonders starke katalytische Wirksamkeit kolloidaler Stoffe.This explains the particularly strong catalytic effectiveness colloidal substances.

Noch größer kann die katalytische Wirkung molekulardispers gelöster Stoffe sein, wenn diese ihrer chemischen Natur nach starke Reaktionsbeschleunigung zu bewirken vermögen.The catalytic effect can be even greater in molecularly dispersed form Substances if their chemical nature has a strong reaction acceleration able to effect.

Der Erfindung liegt die Aufgabe zugrunde, einen heterogenen, hochvoluminösen, kolloidalen Silberoxid-Katalysator auf Magnesiumbasis der eingangs erwähnten Art herzustellen, so daß ein Litergewicht von höchstens ca.The invention is based on the object of providing a heterogeneous, high-volume, colloidal silver oxide catalyst based on magnesium of the type mentioned at the beginning so that a liter weight of at most approx.

400 g oder darunter erreicht wird. Durch die Beaufschlagung von kolloidalem Silberoxid auf Magnesiumoxid wird eine Stärke von kolloidalem Silberoxid auf die Oberfläche des Magnesiumoxid von etwa 5,33 Ä erreicht.400 g or less is reached. By applying colloidal Silver oxide on magnesium oxide is a strength of colloidal silver oxide on the Surface of the magnesium oxide of about 5.33 Å reached.

Gelöst wird diese Aufgabe nach der Erfindung hinsichtlich dieses Verfahrens durch das Einbringen von Magnesiumoxidpulver mit einer Teilchenfeinheit nach einer negativen Mikronisierung in einer 2 Mol Silbernitratlösung. Hierbei wird Magnesiumoxid in mindestens 1.000-fachem Überschuß zugegeben.This object is achieved according to the invention with regard to this method by the introduction of magnesium oxide powder with a particle fineness after a negative micronization in a 2 mole silver nitrate solution. Here is magnesium oxide added in at least a 1,000-fold excess.

Es hat sich gezeigt, daß ein in dieser Weise hergestellter heterogener, kolloidaler Silberoxid-Katalysator als Zusatzstoff in dem nach Patent 28 28 735 angemeldeten Verfahren zur Herstellung einer hochaktiven und hochvoluminösen Calciumhypochlorit- bzw Chlorkalkmischung, in Verbindung mit Magnesiumoxid und kolloidaler Kieselsäure zur Herstellung eines Entgiftungspuders für die Dekontamination von chemischen Kampfstoffen, besonders die dekontaminierenden Eigenschaften verbessert bzw. erhöht.It has been shown that a heterogeneous, colloidal silver oxide catalyst as an additive in the patent 28 28 735 pending process for the production of a highly active and high-volume Calcium hypochlorite or chlorinated lime mixture, in connection with magnesium oxide and colloidal silica for the production of a detox powder for the decontamination of chemical warfare agents, especially the decontaminating properties are improved or increased.

Claims (1)

PATENTANSPRCH 1. Verfahren zur Herstellung eines hochaktiven und hochvoluminösen Silberoxid-Katalysators durch Beaufschlagen von Silberoxid auf Magnesiumoxid mit einer Oberfläche nach b.e.t. 150 - 170 m2/g bzw. nach der Methode Blaine von 55.000 - 70.000 cm2/g, dadurch gekennzeichnet, daß das Ausfällen von kolloidalem Silberoxid durch Beaufschlagen auf hochvoluminöses Magnesiumoxid mit einer Mindestoberfläche von 62,5 m2/g vorgenommen wird. PATENT CLAIM 1. Process for the production of a highly active and high-volume silver oxide catalyst by applying silver oxide to magnesium oxide with a surface according to b.e.t. 150 - 170 m2 / g or according to the Blaine method by 55,000 - 70,000 cm2 / g, characterized in that the precipitation of colloidal Silver oxide by exposure to high-volume magnesium oxide with a minimum surface of 62.5 m2 / g is made.
DE19803001657 1980-01-18 1980-01-18 Highly active and voluminous silver oxide catalyst prodn. - by deposition silver oxide on magnesium oxide, useful in detoxification powder for chemical warfare agent Withdrawn DE3001657A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803001657 DE3001657A1 (en) 1980-01-18 1980-01-18 Highly active and voluminous silver oxide catalyst prodn. - by deposition silver oxide on magnesium oxide, useful in detoxification powder for chemical warfare agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803001657 DE3001657A1 (en) 1980-01-18 1980-01-18 Highly active and voluminous silver oxide catalyst prodn. - by deposition silver oxide on magnesium oxide, useful in detoxification powder for chemical warfare agent

Publications (1)

Publication Number Publication Date
DE3001657A1 true DE3001657A1 (en) 1981-11-26

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Family Applications (1)

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DE19803001657 Withdrawn DE3001657A1 (en) 1980-01-18 1980-01-18 Highly active and voluminous silver oxide catalyst prodn. - by deposition silver oxide on magnesium oxide, useful in detoxification powder for chemical warfare agent

Country Status (1)

Country Link
DE (1) DE3001657A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001034279A2 (en) * 1999-10-12 2001-05-17 Emory University Polyoxometalate materials, metal-containing materials, and methods of use thereof
EP1338307A1 (en) * 2002-02-22 2003-08-27 Rohm And Haas Company Chemical and biological decontamination material and system
US6713076B1 (en) 1998-04-13 2004-03-30 Emory University Methods for removing a contaminant by a polyoxometalate-modified fabric or a polyoxometalate-modified cellulosic fiber and fabrics thereof
US6723349B1 (en) 1999-10-12 2004-04-20 Emory University Polyoxometalate materials, metal-containing materials, and methods of use thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6713076B1 (en) 1998-04-13 2004-03-30 Emory University Methods for removing a contaminant by a polyoxometalate-modified fabric or a polyoxometalate-modified cellulosic fiber and fabrics thereof
WO2001034279A2 (en) * 1999-10-12 2001-05-17 Emory University Polyoxometalate materials, metal-containing materials, and methods of use thereof
WO2001034279A3 (en) * 1999-10-12 2002-01-24 Univ Emory Polyoxometalate materials, metal-containing materials, and methods of use thereof
US6723349B1 (en) 1999-10-12 2004-04-20 Emory University Polyoxometalate materials, metal-containing materials, and methods of use thereof
EP1338307A1 (en) * 2002-02-22 2003-08-27 Rohm And Haas Company Chemical and biological decontamination material and system

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: AEROCHEM HERBERT LETTKO GMBH & CO KG, 6501 OBER-OL

8130 Withdrawal