Process for preparing chlorosilanes

摘要

Production of chlorosilanes (I) involves: (a) reacting silicon with alkyl halides, aryl halides or hydrogen chloride; (b) reacting at least the high boiling product fraction from stage (a) with at least one halide; and (c) reacting at least the high boiling product fraction from stage (a) with alkyl halides, aryl halides and/or chlorosilanes. An independent claim is included for the preparation of (I) by stages (b) and (c) as above, except that the starting material in stage (b) is more generally at least one high boiling product fraction from chlorosilane synthesis.