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:
May. 03, 2016
Filed:
Dec. 20, 2012
Applicant:
Anna Maria Cornelia Francisca Castelijns, Echt, NL;
Inventor:
Anna Maria Cornelia Francisca Castelijns, Echt, NL;
Assignee:
DSM IP ASSETS B.V., Heerlen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/38 (2006.01); C07C 67/30 (2006.01); C07C 67/03 (2006.01); C07C 67/36 (2006.01); C07C 51/09 (2006.01); B01J 38/60 (2006.01); B01J 38/62 (2006.01); B01J 29/90 (2006.01); B01J 21/20 (2006.01); B01J 21/12 (2006.01); B01J 29/70 (2006.01);
U.S. Cl.
CPC ...
C07C 67/03 (2013.01); B01J 21/20 (2013.01); B01J 29/90 (2013.01); B01J 38/60 (2013.01); B01J 38/62 (2013.01); C07C 51/09 (2013.01); C07C 67/36 (2013.01); C07C 67/38 (2013.01); B01J 21/12 (2013.01); B01J 29/7007 (2013.01); B01J 2229/37 (2013.01);
Abstract
This invention relates to a process for the preparation of alkenoic acid esters comprising contacting a lactone with an alcohol and an acidic heterogeneous catalyst, characterized in that the process is carried out in the presence of at least 20 ppm of an acid having a pKa of 5 or less, relative to the amount of the lactone. The presence of at least 20 ppm of an acid having a pKa of 5 or less may stabilize the catalyst during the reaction and may also be used for reactivating an acidic heterogeneous catalyst. The improved yield advantageously allows energy conservation.