The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1992
Filed:
Apr. 30, 1991
Robert A DeVries, Midland, MI (US);
Mary L Ash, Midland, MI (US);
Hughie R Frick, deceased, late of Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A process for purifying an impure vinylically-unsaturated organosilicon product compound prepared by reaction between a vinylically-unsaturated organosilicon precursor and a halogenated organic compound in the presence of a homogeneous zerovalent palladium catalyst complex, the catalyst complex including an organophosphine or organoarsine ligand, in the presence of a hydrogen halide acceptor in an essentially anhydrous diluent, comprising treating a mixture containing the impure vinylically-unsaturated organosilicon product compound with a peroxide for a time sufficient to oxidize organophosphine or organoarsine impurities present in a mixture being treated. The peroxide can be selected from aqueous hydrogen peroxide or organic peroxides. The thus-treated mixture can be further treated by chromatography over silica gel or alumina. In optional embodiments, chromatography over silica gel or alumina can precede treatment with the peroxide.