Patent ID: 7456308

Claim:
A process for preparing diphenylchlorosilanes by the Grignard process comprising contacting a phenyl Grignard reagent, an ether solvent, a trichlorosilane selected from the group consisting of methyltrichlorosilane, phenyltrichlorosilane, and vinyltrichlorosilane, a phenylchlorosilane selected from the group consisting of phenylmethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane, phenylvinyldichlorosilane, and toluene; wherein the mole ratio of the ether solvent to the phenyl Grignard reagent is 2 to 5, the mole ratio of the trichlorosilane to the phenyl Grignard reagent is 0.1 to 10, the mole ratio of the phenylchlorosilane to the phenyl Grignard reagent is 0.5 to 5, and the mole ratio of toluene to the phenyl Grignard reagent is 3 to 7.