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:
Jun. 24, 2014
Filed:
Sep. 13, 2005
Applicants:
Dirk Kuppert, Recklinghausen, DE;
Juergen Herwig, Huenxe, DE;
Norbert Wilczok, Muelheim, DE;
Anita Voelkel, Herten, DE;
Manfred Thiery, Coesfeld, DE;
Inventors:
Dirk Kuppert, Recklinghausen, DE;
Juergen Herwig, Huenxe, DE;
Norbert Wilczok, Muelheim, DE;
Anita Voelkel, Herten, DE;
Manfred Thiery, Coesfeld, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K 8/00 (2006.01); A61K 8/18 (2006.01); A61Q 13/00 (2006.01); C07C 2/42 (2006.01); C07C 13/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to the preparation of trimethylcyclododecatriene in a continuous or batchwise process by trimerizing isoprene in the presence of a catalyst system and of a solvent. It is possible to isolate the resulting crude trimethylcyclododecatriene by means of distillation. The dimethylcyclooctadiene formed as a by-product may likewise be isolated from the crude product.