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:
Sep. 21, 2004
Filed:
Jan. 03, 2003
Applicant:
Inventor:
Christoph Mollenkopf, Frankfurt, DE;
Assignee:
Nutrinova Nutrition Specialties & Food Ingredients GmbH, Wiesbaden, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 5/710 ;
U.S. Cl.
CPC ...
C07C 5/710 ;
Abstract
A process for the preparation of sorbic acid by thermal cleavage of the polyester prepared from crotonaldehyde and ketene, in the presence of a solvent and of an amine as catalyst with simultaneous distillation out of the sorbic acid formed and of the solvent through a rectification column with reflux, wherein only the solvent rather than the distillate is used as reflux, leads to high yields of sorbic acid and to a reduced consumption of amine catalyst.