Abstract: The invention relates to a process for cleavage of chlorohydrocarbons which are present as an impurity in organochlorosilanes, in which the chlorohydrocarbons are brought into contact with steel surfaces which comprise nickel as an alloying constituent, and are cleaved into olefins and hydrogen chloride.

Abstract: Alkylchlorosilanes are prepared continuously from the residue of direct synthesis of alkylchlorosilanes containing liquid constituents with a boiling point of at least 70.degree. C. at 1013 hPa and solid constituents, by heating the residue with hydrogen chloride at temperatures of from 300.degree. C. to 800.degree. C. in a tubular reactor with internals which can be rotated.

Abstract: In the process of the present invention, disilanes are reacted with hydrogen chloride in the presence of a catalyst comprising(A) palladium(O) or platinum(O), and(B) an organic compound selected from among tertiary amines, carboxamides, alkylureas, tertiary phosphines, phosphoramides, quaternary ammonium halides, quaternary phosphonium halides or mixtures thereof to give hydrogen-containing methylchlorosilanes.

Abstract: In the process for the removal of olefins from the silanes or silane mixtures obtained during methylchlorosilane synthesis, the olefins are reacted with hydrogen in the presence of hydrogenation catalysts.

Abstract: A process for separating methylchlorosilanes from high boiling residues from the methylchlorosilane synthesis, in which cleavable methylchlorodisilanes which are present in the residues and which have at least two chlorine atoms attached to one silicon atom are cleaved with hydrogen chloride in the presence of a catalyst which remains in the reaction mixture, which comprises cleaving the methylchlorodisilanes in the presence of by-products which are more volatile than the cleavable methylchlorodisilanes in the high boiling residues from the methylchlorosilane synthesis which have a boiling point of at least 70.degree. C. under normal conditions and continuously removing the more volatile by-products from the reaction mixture along with the methylchlorosilanes and the noncleavable methylchlorodisilanes.

Abstract: A process for separating alkenes from a methylchlorosilane mixture by adding at least a stoichiometric amount of hydrogen chloride necessary for saturating the alkenes in the methylchlorosilane mixture and thereafter removing resulting chloroalkanes by distillation.

Abstract: A continuous process for preparing silanes and siloxanes having SiOC groups which comprises (a) introducing in a liquid phase a chlorosilane and a hydroxyl-containing aliphatic compound in parallel flow into a first stage of a first reactor in an amount such that from 0.5 to 0.