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:
Aug. 20, 2002
Filed:
Dec. 19, 2001
Applicant:
Inventors:
Daniel Ostgard, Kleinostheim, DE;
Monika Berweiler, Maintal, DE;
Stefan Roder, Sinntal, DE;
Jorg Sauer, Mobile, AL (US);
Bernd Jaeger, Darmstadt, DE;
Norbert Finke, Oer-Erkenschwick, DE;
Christian Lettmann, Essen, DE;
Assignee:
Degussa AG, Hanau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
C07C / ;
Abstract
Process for the preparation of isophorone diamine from isophorone nitrile, isophorone nitrilimine or mixtures containing isophorone nitrile and/or isophorone nitrilimine by hydrogenation through to amine in the presence of at least ammonia, hydrogen and a formed Raney hydrogenation catalyst based on cobalt, nickel, copper and/or iron, wherein the Raney catalyst is present in the form of hollow bodies.