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:
Jan. 10, 2006
Filed:
Apr. 10, 2002
Mikio Aramata, Annaka, JP;
Hideaki Ozeki, Annaka, JP;
Akio Muraida, Annaka, JP;
Susumu Ueno, Annaka, JP;
Toshio Shinohara, Annaka, JP;
Tetsuya Inukai, Annaka, JP;
Mikio Aramata, Annaka, JP;
Hideaki Ozeki, Annaka, JP;
Akio Muraida, Annaka, JP;
Susumu Ueno, Annaka, JP;
Toshio Shinohara, Annaka, JP;
Tetsuya Inukai, Annaka, JP;
Shin-Etsu Chemical Co., LTD, Tokyo, JP;
Abstract
In a Rochow process, organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst and a co-catalyst. The invention uses as the co-catalyst a powder of co-catalyst active element-copper alloy containing substantial strain energy because this co-catalyst can reduce the activation time taken until a steady state is reached, which has been an outstanding problem in Rochow reaction, maintain the steady state over time and increase the selectivity of desired diorganodihalosilane for eventually increasing the yield based on the starting silicon.