Patent ID: 6407276
Filing Date: 2002-06-18
Classification: C07F

Abstract:
A method for forming a dialkyldichlorosilane, comprising reacting at a reaction temperature elemental silicon with an alkyl chloride using copper as a catalyst together with promoters zinc, tin, and a special promoter comprising silver, a silver compound, gold, a gold compound, or combinations thereof,wherein the reacting generates the dialkyldichlorosilane in accordance with a first selectivity for the dialkyldichlorosilane that exceeds a second selectivity for the dialkyldichlorosilane, and wherein the second selectivity is a selectivity for the dialkyldichlorosilane that would have existed had the special promoter been absent; and wherein the first selectivity increases as the reaction temperature increases, wherein the second selectivity decreases as the reaction temperature increases, and wherein the reaction temperature is no greater than about 330Â° C.