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:
Dec. 25, 2018
Filed:
May. 25, 2017
Evonik Degussa Gmbh, Essen, DE;
Alexander Martin Rüfer, Recklinghausen, DE;
Anne Rittsteiger, Olfen, DE;
Jörg-Joachim Nitz, Essen, DE;
Stephan Kohlstruk, Gladbeck, DE;
Martina Ortelt, Flein, DE;
Dirk Fuchsmann, Haltern am See, DE;
Michael Demming, Dülmen, DE;
Christine Stemmer, Marl, DE;
Denise Ott, Marl, DE;
Anja Stasch, Recklinghausen, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
A compound of the structural formula 1 A process for producing 2-(3-(aminomethyl)-3,5,5-trimethylcyclohexyl)propane-1,3-diamine by A) reacting isophorone nitrile and malononitrile to afford the intermediate 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile, and B) hydrogenating 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar.