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:
Feb. 04, 2014
Filed:
Feb. 02, 2012
Franz-erich Baumann, Duelmen, DE;
Matthias Ullrich, Marl, DE;
Martin Roos, Haltern am See, DE;
Peter Hannen, Herten, DE;
Frank-martin Petrat, Muenster, DE;
Harald Haeger, Luedinghausen, DE;
Angela Koeckritz, Berlin, DE;
Guido Walther, Rostock, DE;
Jens Deutsch, Rangsdorf, DE;
Andreas Martin, Berlin, DE;
Franz-Erich Baumann, Duelmen, DE;
Matthias Ullrich, Marl, DE;
Martin Roos, Haltern am See, DE;
Peter Hannen, Herten, DE;
Frank-Martin Petrat, Muenster, DE;
Harald Haeger, Luedinghausen, DE;
Angela Koeckritz, Berlin, DE;
Guido Walther, Rostock, DE;
Jens Deutsch, Rangsdorf, DE;
Andreas Martin, Berlin, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
The invention provides a method to produce primary diamines by catalytic conversion of diols having a linear main chain of from 4 to 31 carbon atoms into the corresponding diamines. The reaction is conducted in a liquid or supercritical phase and is catalyzed by a homogeneous ruthenium-containing complex. The primary diamines obtained may be suitable for polyamide syntheses.