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:
Mar. 14, 2000
Filed:
Apr. 06, 1999
Applicant:
Inventor:
Stephen E Belmont, Baton Rouge, LA (US);
Assignee:
Albemarle Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548480 ;
Abstract
A process of producing cyclic imides from cyclic anhydrides is described. Despite the fact that an acid anhydride is reacted with a primary amine in the presence of both water and an acid, the reaction is materially unaffected by acid-catalyzed hydrolysis of the anhydride. Thus a reaction is provided which eliminates the handling and processing problems associated with performing reactions under anhydrous conditions, and which can provide a product of high purity in very high yield.