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:
Jun. 08, 2004
Filed:
Feb. 01, 2001
Applicant:
Inventor:
Bruce I. Rosen, Morton Grove, IL (US);
Assignee:
BP Corporation North America Inc., Warrenville, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 5/142 ; C07C 5/116 ;
U.S. Cl.
CPC ...
C07C 5/142 ; C07C 5/116 ;
Abstract
A process for purifying a naphthalenic carboxylic acid comprising contacting at a temperature below about 575° F. a mixture comprising an impure naphthalenic carboxylic acid and a solvent in the presence of hydrogen gas with a noble metal on carbon catalyst. The process results in reduced amounts of organic impurities in the purified acid when compared to other purification processes.