Process for preparing alkylhydrogenchlorosilanes

Abstract

Alkylhydrogenchlorosilanes of formula I: R.sub.x HSiCl.sub.y (I) wherein R are identical or different alkyl radicals, x is 1 or 2 and y is 1 or 2 and the sum of x and y is equal to 3, are prepared by comproportionating alkylchlorosilanes of formula II: R.sub.a SiCl.sub.n (II) wherein R denotes identical or different alkyl radicals, a is 1 or 2 and n is 2 or 3 and the sum of a and n is equal to 4 with hydrogenchlorosilanes of formula III: R.sub.b H.sub.c SiCl.sub.4-b-c (III) wherein R denotes identical or different alkyl radicals, b is 0, 1, 2 or 3 and c is 1, 2, 3 or 4 and the sum of b and c is equal to or smaller than 4, in the presence of a catalyst saturated with a hydrogen halide.

Dependencies are inferred from the claim text.