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:
Oct. 25, 1983
Filed:
Sep. 20, 1982
Applicant:
Inventors:
Ora L Flaningam, Midland, MI (US);
Roland L Halm, Madison, IN (US);
Assignee:
Dow Corning Corporation, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07F / ;
U.S. Cl.
CPC ...
203 58 ; 203 71 ; 203 88 ; 556465 ; 556466 ;
Abstract
A method for separating close-boiling chlorosilanes by the procedures of extractive distillation using sulfolane as the extractive solvent is described. An example of close-boiling chlorosilanes which can be separated by this method include dimethyldichlorosilane and methyltrichlorosilane containing mixtures. The invention comprises heating a mixture of the close-boiling chlorosilanes with sulfolane to distill the lower-boiling chlorosilane from the mixture and thereafter separating the sulfolane and the high-boiling chlorosilane.