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:
May. 17, 2005
Filed:
Apr. 23, 2003
Susumu Ueno, Takefu, JP;
Toshio Shinohara, Takasaki, JP;
Mikio Aramata, Annaka, JP;
Yoichi Tanifuji, Tokyo, JP;
Tetsuya Inukai, Annaka, JP;
Hajime Ishizaka, Annaka, JP;
Susumu Ueno, Takefu, JP;
Toshio Shinohara, Takasaki, JP;
Mikio Aramata, Annaka, JP;
Yoichi Tanifuji, Tokyo, JP;
Tetsuya Inukai, Annaka, JP;
Hajime Ishizaka, Annaka, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
In an industrial process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, a contact mass composed of the metallic silicon and the catalyst further contains an effective amount of a phosphine chalcogenide compound. The invention drastically increases the silane formation rate and the utilization of silicon without lowering the selectivity of useful silane.