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. 26, 2006
Filed:
Sep. 30, 2003
Applicants:
Werner Bonrath, Freiburg, DE;
Alois Haas, Kleinmachnow, DE;
Simone Hoppmann, Leipzig, DE;
Thomas Netscher, Bad Krozingen, DE;
Horst Pauling, Aesch, CH;
Inventors:
Werner Bonrath, Freiburg, DE;
Alois Haas, Kleinmachnow, DE;
Simone Hoppmann, Leipzig, DE;
Thomas Netscher, Bad Krozingen, DE;
Horst Pauling, Aesch, CH;
Assignee:
DSM IP Assets B.V., Te Heerlen, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 311/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for the manufacture of (all-rac)-α-tocopherol by the acid-catalyzed reaction of trimethylhydroquinone with isophytol or phytol is characterized by carrying out the reaction in the presence of methane trisulphonate as the catalyst in an organic solvent. The product of the process is the most active and industrially most important member of the vitamin E group.