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. 10, 2002
Filed:
Dec. 26, 2001
Applicant:
Inventors:
Jean-Michel Paul, Metz, FR;
Patrick Busca, Bening les Saint-Avold, FR;
Assignee:
Atofina, Puteaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 6/952 ; C07C 6/900 ;
U.S. Cl.
CPC ...
C07C 6/952 ; C07C 6/900 ;
Abstract
This process for preparing an unsaturated carboxylic ester by esterifying an unsaturated carboxylic acid with an alcohol in the presence of a cationic resin catalyst, the water of reaction being removed in the form of an azeotrope with the esterifying alcohol or with a solvent, is characterized in that the esterification reaction is conducted by passing the mixture of reactants in upflow mode through a bed ( ) of the said cationic resin in a recirculation loop ( ) which is combined with a stirred tank ( ) in which the reactants are mixed and from which the water of reaction is removed azeotropically.