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:
Jul. 24, 2012
Filed:
Sep. 13, 2007
Applicants:
Philippe Roccati, Charnoz sur Ain, FR;
Didier Letourneur, Lyons, FR;
Philippe Denis, Decines, FR;
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for producing amines by the hydrogenation of nitrile compounds in the presence of a catalyst, notably a method for producing diamines by the continuous hydrogenation of dinitrile compounds in the presence of a Raney-metal catalyst, includes controlling the molar flow of nitrile compounds and the mass flow of catalyst in a hydrogenation piston reactor in order to minimize the occurrence of impurities and deterioration of the catalyst.