Recovery of copper from residues from the Muller-Rochow process

摘要

Copper is recovered from the residues from the Muller-Rochow direct synthesis of alkyl chloro-silanes by producing a suspension of the residues in an ammoniacal solution of an ammonium salt and blowing air into the suspension to produce a copper salt solution. Steam is blown into the filtered copper salt solution releasing NH3 and precipitating an oxidic or hydroxidic copper salt that may be used again directly in the Muller Rochow synthesis.