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:
Nov. 13, 2001
Filed:
Aug. 22, 2000
Applicant:
Inventors:
Thomas Fairchild Brownscombe, Houston, TX (US);
Garo Vaporciyan, Amsterdam, NL;
Narayana Mysore, Houston, TX (US);
Susan Secor Pfrehm, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 6/300 ; C07C 6/333 ; C07C 6/3337 ; C07C 6/344 ; C07C 6/364 ;
U.S. Cl.
CPC ...
C07C 6/300 ; C07C 6/333 ; C07C 6/3337 ; C07C 6/344 ; C07C 6/364 ;
Abstract
An oxidation free process for converting a hydroxy substituted aromatic to an aromatic diacid which comprises reacting a hydroxy substituted aromatic with excess basic salt in the presence of carbon dioxide at disproportionation/isomerization reaction conditions.