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. 04, 2014
Filed:
Nov. 17, 2011
Applicants:
Christian Lettmann, Coesfeld, DE;
Guido Streukens, Wuppertal, DE;
Matthias Orschel, Muenster, DE;
Gerda Grund, Coesfeld, DE;
Inventors:
Christian Lettmann, Coesfeld, DE;
Guido Streukens, Wuppertal, DE;
Matthias Orschel, Muenster, DE;
Gerda Grund, Coesfeld, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/00 (2006.01); C07C 209/48 (2006.01); C07C 209/52 (2006.01);
U.S. Cl.
CPC ...
C07C 209/52 (2013.01); C07C 209/48 (2013.01); C07C 2101/14 (2013.01);
Abstract
The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or IPDA for short, by means of catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminating hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, also called isophoronenitrile or IPN for short hereinafter.