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. 12, 2006
Filed:
Aug. 11, 2004
Lisa Giraudi, Huningue, FR;
Werner Bonrath, Freiburg, DE;
Lisa Giraudi, Huningue, FR;
Werner Bonrath, Freiburg, DE;
DSM IP Assets B.V., Heerlen, NL;
Abstract
The present invention is concerned with a novel process for the manufacture of tocol, tocol derivatives and tocopherols, especially α-tocopherol, by the reaction of a hydroquinone featuring 0 to 3 methyl groups, especially 2,3,5-trimethylhydroquinone, with isophytol, phytol or a(n) (iso)phytol derivative, most preferably with isophytol, in the presence of gadolinium trifluoromethanesulfonate, Gd(OSOCF), as the catalyst in a biphasic solvent system. This biphasic solvent system consists essentially of a polar organic solvent and a non-polar organic solvent. The polar organic solvent is preferably ethylene carbonate and/or propylene carbonate. The non-polar solvent is preferably at least a solvent selected from the group consisting of hexane, heptane, octane, cyclohexane and methylcyclohexane.