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:
Apr. 09, 2013
Filed:
Dec. 19, 2011
Applicants:
Werner Pietzonka, Therwil, CH;
Peter Ruckstuhl, Hölstein, CH;
Angela Wildermann, Bad Säckingen, DE;
Inventors:
Assignee:
DSM IP Assets B.V., Heerlen, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 8/00 (2006.01); B01D 3/14 (2006.01); C07D 311/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rectification column and system for the working-up of a vitamin E (VE)- and/or vitamin E acetate (VEA)-containing product stream includes purification of a vitamin E-containing product stream, acetylation of at least a part of the purified vitamin E and purification of at least a part of the acetylated vitamin E, the purification of vitamin E and vitamin E acetate preferably being effected by distillation, for example rectification.