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

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

of Mr. Herbert Lettko, 6500 Mainz-Drais,

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.

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.

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.

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.

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.

A given contact substance is therefore all the more effective, the finer at given amount is its degree of distribution.

This explains the particularly strong catalytic effectiveness colloidal substances.

The catalytic effect can be even greater in molecularly dispersed form Substances if their chemical nature has a strong reaction acceleration able to effect.

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 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.

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.

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)

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.