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:
Nov. 19, 2013
Filed:
Dec. 29, 2005
Applicants:
Michael Grass, Haltern am See, DE;
Burkhard Reeken, Dorsten, DE;
Axel Tuchlenski, Weinheim, DE;
Alfred Kaizik, Marl, DE;
Inventors:
Michael Grass, Haltern am See, DE;
Burkhard Reeken, Dorsten, DE;
Axel Tuchlenski, Weinheim, DE;
Alfred Kaizik, Marl, DE;
Assignee:
Evonik Oxeno GmbH, Marl, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 61/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to the preparation of alicyclic carboxylic acids or their derivatives by selective hydrogenation of the corresponding aromatic carboxylic acid (derivatives) in at least two series-connected reactors, at least one reactor being operated in loop operating mode. The catalyst volumes in the method are set in such a manner that the catalyst volume required, based on the conversion rate, is as low as possible.