US Patent 7351847 Grignard processes with increased content of diphenylchlorosilanes
Patent 7351847 was granted and assigned to Dow Corning on April, 2008 by the United States Patent and Trademark Office.
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Three improved Grignard processes are used for preparing phenyl-containing chlorosilane products wherein the yield of diphenylchlorosilanes as a product is maximized, while the yield of phenylchlorosilanes as a product is minimized. In one embodiment, the process involves contacting a phenyl Grignard reagent, an ether solvent, an aromatic halogenated coupling solvent and a trichlorosilane. In another embodiment, the process involves contacting a phenyl Grignard reagent, an ether solvent, an aromatic halogenated coupling solvent, a trichlorosilane, and a phenylchlorosilane. In yet another embodiment, the process involves contacting a phenyl Grignard reagent, an ether solvent, an aromatic halogenated coupling solvent, and a phenylchlorosilane. In each embodiment, the reactants are present in particular mole ratios of the components.
US Patent 07351847 Grignard processes with increased content of diphenylchlorosilanes US Patent 7351847 Grignard processes with increased content of diphenylchlorosilanes
US Patent 07351847 Grignard processes with increased content of diphenylchlorosilanes
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