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:
May. 01, 2012
Filed:
Mar. 20, 2007
Applicants:
Jürgen Herwig, Hünxe, DE;
Wilhelm Brügging, Haltern am See, DE;
Martin Roos, Haltern am See, DE;
Norbert Wilczok, Mülheim, DE;
Inventors:
Jürgen Herwig, Hünxe, DE;
Wilhelm Brügging, Haltern am See, DE;
Martin Roos, Haltern am See, DE;
Norbert Wilczok, Mülheim, DE;
Assignee:
EVONIK DEGUSSA GmbH, Essen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 2/46 (2006.01);
U.S. Cl.
CPC ...
Abstract
Preparation of cyclododecatriene in a continuous or discontinuous process by trimerization of butadiene in the presence of a catalyst system and a solvent, the crude cyclododecatriene obtained being able to be isolated by means of distillation. The cyclooctadiene formed as by-product can likewise be isolated from the crude product.