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. 06, 2007
Filed:
Jan. 21, 2004
Applicants:
Franciscus H. A. M. Vandenbooren, Maastricht, NL;
Hubertus J. M. Bosman, Sittard, NL;
Alexander V. Peters, Aachen, DE;
Maria J. G. Van Den Boer, Houthalen-Helchteren, BE;
Inventors:
Franciscus H. A. M. Vandenbooren, Maastricht, NL;
Hubertus J. M. Bosman, Sittard, NL;
Alexander V. Peters, Aachen, DE;
Maria J. G. Van Den Boer, Houthalen-Helchteren, BE;
Assignee:
DSM IP Assets B.V., Te Heerlen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
Process for the catalytic hydrogenation of a nitrite in the presence of an amine and a catalyst wherein the catalyst is a liquid-rinsed Raney-type catalyst contacted with a hydroxide prior to contacting the catalyst with the amine. The process results in higher selectivity in the formation of diamines from diniriles.