PROCESS FOR WORKING UP RESIDUES FROM THE DIRECT SYNTHESIS OFORGANOCHLOROSILANES

摘要

The invention relates to a process for preparing alkylchlorosilanes from the liquid constituents of the residues from the direct synthesis of alkylchlorosilanes which have a boiling point of above 70ÀC at 1013 hPa and comprise disilanes, in which the residues are heated with hydrogen chloride and silicon at temperatures of at least 300ÀC, with at least 10% by weight of trichlorosilane and/or tetrachlorosilane, based on the weight of the alkylchlorosilanes formed, being formed at the same time.