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:
Feb. 15, 2000
Filed:
Apr. 22, 1999
Applicant:
Inventors:
Sylvain Claude, Paris, FR;
Zephirin Mouloungui, Toulouse, FR;
Jeong-Woo Yoo, Toulouse, FR;
Antoine Gaset, Toulouse, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549229 ;
Abstract
The invention concerns a method for preparing glycerol carbonate. This method consists of making urea and glycerol react at a temperature substantially between 90.degree. C. and 220.degree. C. in the presence of a catalyst bearing Lewis acid sites, in particular metallic or organometallic salts or supported metallic compounds. The invention enables glycerol carbonate to be obtained, by a catalytic carbamoylation/carbonation reaction, in a highly pure state under economic conditions.