Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Jorg Hensel

Edgar Koberstein

Alfred Bozon

Herbert M Volker

Eduard Lakatos

Gerd Schreyer

Friedhelm Geiger

Martin H Volker

Baffle means coated with effective catalyts are positioned inside exhaust pipes to convert the harmful substances in said exhaust gases into harmless components. The baffle means impart a disturbed flow and/or change of the direction of flow of the exhaust gases in the exhaust pipe.

Apparatus for the catalytic purification of exhaust gases

An improved process for applying a coating or film of at least one catalytically active element to the external surface of a porous catalyst carrier having a large surface area by contacting said catalyst carrier with a solution of said at least one catalytically active element, wherein the improvement comprises:

Process for the application of a catalytically active coating on a

There are provided shaped catalysts, particularly for the formation and/or equipping of reaction chambers with catalytically active surfaces, consisting of a structural reinforcing agent of ferrous metal, a layer of a heat resistant carrier material on the structural reinforcing agent as well as a catalytically active component on the carrier material; the body of the structural reinforcing agent consists of iron or steel and its surface is provided with a nonscaling, adhesive and anchoring enhancing aluminum/iron diffusion layer obtained by a tempering of aluminum coated iron or steel at a temperature between 600.degree. and 1200.degree. C. for at least one minute. There is also disclosed a process for making the catalysts.

Shaped catalyst and process for its production

In a monolithic carrier catalyst containing a catalytically active substance for the purification of a stream of exhaust gases from an internal combustion engine, the improvement comprises providing an increasing concentration of catalytically active substance on the monolithic carrier catalyst, wherein the concentration increases in the direction of flow of the exhaust gases. The catalyst is particularly useful in oxidizing and/or reducing the noxious substances in automotive exhaust gases.

Monolithic carrier catalyst and arrangements of such a catalyst for the

An improvement in producing an adherent metal oxide coating on a solid body comprises incorporating a nitrogen-containing polymer in a dispersion of the metal oxide into which the body is dipped. The pH of the dispersion is controlled in order to stabilize the dispersion. The body can then be dried. The invention is especially useful for applying a metal oxide coating to a ceramic material employed as a catalyst carrier for automotive exhaust gas purification.

Process for producing an adherent metal oxide coating on a solid body

Alkylsulfonic acids are prepared by oxidation of an alkyl mercaptan or dialkyl disulfide with hydrogen peroxide in an inert medium in the presence of ammonium or alkali molybdate or ammonium or alkali tungstate.

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Hanau, Germany

Jorg Hensel