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:
May. 22, 2001
Filed:
Dec. 30, 1998
Pen-Chung Wang, Houston, TX (US);
Gayle Edward Back, Houston, TX (US);
Glynnda Addicks, Sugar Land, TX (US);
Jimmie Dale Elmore, Houston, TX (US);
Herbert Elliott Fried, Owings Hills, MD (US);
Shell Oil Company, Houston, TX (US);
Abstract
A process for partially oxidizing and converting a polyoxyalkylene polyol composition to a polycarboxylic acid composition comprising reacting a polyoxyalkylene polyol composition with a stable free radical nitroxide in the presence of an NO,generating compound, a flow of air or oxygen, and optionally water, at elevated temperatures. The oxidation reaction is discontinued by deactivating the catalyst and removing the source of air or oxygen, the NO,generating source, and the optional water. From 60% to no more than 95% of the polyoxyalkylene polyol composition is converted.