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:
Dec. 30, 1997
Filed:
Mar. 26, 1996
Applicant:
Inventors:
Assignee:
Bromine Compounds Ltd., Beer-Sheva, IL;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562475 ;
Abstract
A process for the preparation of 5-hydroxyisophthalic acid (5-HIPA) that comprises hydrolyzing a starting material chosen from among 5-bromoisophthalic acid (5-BIPA), mixtures of 5-BIPA and dibromoisophthalic acid isomers, and salts of thereof in an aqueous alkaline solution, in the presence of a catalytically effective amount of a copper compound catalyst and in a temperature range of between 100.degree. and 270.degree. C.