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. 29, 2008
Filed:
Nov. 09, 2001
Stephan Klein, Mettmann, DE;
Hans-dieter Block, Leverkusen, DE;
Hans-joachim Leimkühler, Leverkusen, DE;
Werner Dick, Bergisch Gladbach, DE;
Dirk Müller, Bergisch Gladbach, DE;
Johannes-peter Schäfer, Kürten, DE;
Stephan Klein, Mettmann, DE;
Hans-Dieter Block, Leverkusen, DE;
Hans-Joachim Leimkühler, Leverkusen, DE;
Werner Dick, Bergisch Gladbach, DE;
Dirk Müller, Bergisch Gladbach, DE;
Johannes-Peter Schäfer, Kürten, DE;
Solarworld Aktiengesellschaft, Bonn, DE;
Abstract
The invention relates to a method of producing silane or hydrochlorosilanes by disproportionation of a higher chlorinated hydrochlorosilane or a mixture of said hydrochlorosilanes in the presence of a catalyst. Before the catalyst is used, it is a) washed with hyper-pure water in one or several steps; b) transferred in the water-moist state to the reactor in which the disproportionation is to proceed; c) treated in the reactor with boiling methanol or rinsed with anhydrous methanol; and d) the methanol is removed from the catalyst by evacuation and/or stripping with inert gas. The invention further relates to a method for treating disproportionation catalysts.