Bayer Aktiengesellschaft

Pechiney Electrometallurgie

Norddeutsche Affinerie Aktiengesellschaft

Ge Bayer Silicones Gmbh & Co. Kg

Bruno Degen

Gebhard Wagner

Kurt Feldner

Elke Licht

Manfred Schulze

Matthias-Sven Steiner

Hans-Heinrich Moretto

Werner Buchner

Manfred Schulze, Deceased

Rudolf Mundil

Rainer Weber

Hans Sattlegger

Thomas Margaria

Christoph Schild

Karl Schnurrbusch

Theo Achtenberg

Gunther Maass

Karl-Heinz Rudolph

Bernd E Langner

Hans Joachim Lucking

Wolfgang Schartau

Hans-Joachim Kaiser

Hans Rinkes

Joachim Maas

Peter Stantke

Klaus-Peter Minuth

Ludwig Fries

Judat Helmut

Alfred B Orsting

Thomas Leister

The present invention relates to a process for preparing alkyl halosilanes by reacting a contact material which comprises, in addition to silicon, at least one copper-containing compound as catalyst and at least one promoter, with an alkyl halide.

Process for preparing alkyl halosilanes

The invention relates to copper-based catalysts, processes for their production and their use and to a process for the production of alkyl halosilanes in the presence of said catalysts.

Copper-based catalysts, processes for their production and their use and

The process for producing alkylhalogenosilanes, which comprises reacting a physical mixture of silicon, a selenium or tellurium promoter and a copper catalyst with an alkyl halide.

Process for producing alkylhalogenosilanes

Metallurgical silicon containing phosphorus for the preparation of

A method of producing alkyl halogen silanes, more particularly methyl chlorosilanes, by reacting silicon with an alkyl halide in the presence of at least one catalyst and easily volatile or gaseous halogen-containing and/or alkoxy-containing sulphur compound and optional promoter substances.

Method of producing alkyl halogen silanes

Fine particle silicon containing surface-bound halogen, a process for

Metallic silicon for the Rochow-Synthesis is reduced to particles measuring at least 5 mm in their smallest dimension and 15 mm in their largest dimension, cooling the silicon from a temperature of at least 700.degree. C. to at most 120.degree. C. within a maximum of 2 seconds, and then ground and reacted.

Process for the preparation of organochlorosilanes

A process for the preparation of alkyl halogenosilanes comprising reacting silicon with alkyl halide in the presence of a copper catalyst and promoter substances and phosphorous and phosphorous compounds in combination with indium or indium compounds or aluminum or aluminum compounds or a mixture of aluminum or aluminum compounds and indium or indium compounds.

Process for the preparation of alkyl halogenosilanes

A process for the preparation of alkylhalogenosilanes by reaction of silicon with an alkyl halide in the presence of a copper catalyst and promoter substances, the improvement wherein gaseous phosphorus compounds are admixed, as promotor substances, with the stream of alkyl halide.

Process for the preparation of alkylhalogenosilanes

In the production of organochlorosilanes by reaction of silicon with an alkyl- and/or arylchloride in the presence of a copper catalyst and, optionally, promoter elements, the improvement wherein the silicon has been atomized with an inert gas, has a particle size of less than about 1000 .mu.m, by weight has an Al content of about 0.05 to 0.38%, a Ca content of about 0.02 to 0.2% and an Fe content of about 0.25 to 0.55%.

Process for the production of organochlorosilanes

A process is disclosed for working up the high-boiling, solids-containing residues obtained in the synthesis of organochlorosilanes which are hydrolyzed and then optionally oxidized, with oxygen-containing gases, comprising adding during hydrolysis and/or oxidation a surface-active substance which hydrophilicizes the surface of the solids.

Process for working up hydrolysis residues from the synthesis of

A process is disclosed for working up the high-boiling, solids-containing residues obtained in the synthesis of organochlorosilanes which are hydrolyzed and then optionally oxidized, comprising adding during hydrolysis and/or oxidation a surface-active agent which hydrophilicizes the surface of the solids.

In the production of an organochlorosilane by reaction of silicon or a silicon alloy with an alkyl or aryl chloride in the presence of a copper catalyst, the improvement which comprises employing the silicon or alloy in atomized form.

Process for the production of organosilanes

In a polysiloxane molding composition which in the presence of water crosslinks to an elastomer and which comprises

Polysiloxane molding compositions

In the preparation of catalytic copper with an average particle size between about 0.1 and 100 microns and a copper-I oxide content of about 3 to 100% by oxidation of a Cu powder, the improvement which comprises carrying out the oxidation with oxygen at a reduced partial pressure compared with that of air, the resulting catalyst being of enhanced catalytic activity especially for the reaction of hydrocarbon chlorides with silicon for the production of organochlorosilanes (Rochow synthesis) wherein the desired material is produced in higher yield and greater selectivity.

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Bruno Degen