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. 05, 1982
Filed:
Jul. 24, 1980
Applicant:
Inventors:
Ronald J Allain, Naperville, IL (US);
Joseph P Maniscalco, Sugar Land, TX (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556430 ;
Abstract
An improved process for producing hexamethyldisilane by reacting ether solutions of methyl Grignard with a crude mixture of chloromethyl disilanes, the improvement which comprises obtaining higher yields and simplified purification of HMDS by the use of a mixed solvent system composed of tetrahydrofuran and the diethyl ether of tetraethylene glycol.