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. 28, 1997
Filed:
Dec. 20, 1995
Applicant:
Inventors:
Herbert Elliott Fried, Houston, TX (US);
Michael Wayne Potter, Sugar Land, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525377 ; 5253321 ; 5253328 ; 5253329 ; 5253331 ; 5253332 ;
Abstract
A process for the preparation of polymeric alpha,omega-dialdehydes, diacids and mixtures thereof, which process comprises reacting a corresponding polymeric aliphatic alkanediol with a stable free radical nitroxide in the presence of a NO.sub.x -generating compound, an oxidant and, optionally, a solvent and/or a bromide-containing compound, and thereafter separating out the polymeric alpha,omega-dialdehyde and/or diacid.