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:
Jul. 03, 2001
Filed:
Oct. 03, 2000
Alexandra Brand, Darmstadt, DE;
Hans-Josef Sterzel, Dannstadt-Schauernheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In an extraction process for isolating trimethoxysilane (TMS) from a TMS/methanol mixture by formation of two phases, namely a TMS-rich extract phase and a methanol-rich raffinate phase, by addition of one or more methanol-soluble inorganic and/or organic salts and, if desired, an additional nonpolar organic solvent and subsequent phase separation, the amount of salt added is selected so that the weight ratio of trimethoxysilane to methanol in the extract phase is at least 94% by weight:6% by weight (normalized to 100% by weight). The use of one or more inorganic salts in an extraction process for isolating trimethoxysilane from a trimethoxysilane/methanol mixture is also claimed.