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. 18, 2008
Filed:
Jan. 20, 2003
Gérald Bocquenet, Communay, FR;
André Chesnais, Saint-Symphorien, FR;
Jean-michel Desire, Villeurbanne, FR;
Philippe Leconte, Meyzieu, FR;
Lionel Sever, Luzinay, FR;
Gérald Bocquenet, Communay, FR;
André Chesnais, Saint-Symphorien, FR;
Jean-Michel Desire, Villeurbanne, FR;
Philippe Leconte, Meyzieu, FR;
Lionel Sever, Luzinay, FR;
Rhodia Polyamide Intermediates, Saint—Fons, FR;
Abstract
A process for the hydrogenation of compounds comprising nitrile or nitro functional groups to amine, aminonitrile or aminonitro compounds is provided. The process can be a continuous process conducted in the presence of a heterogeneous hydrogenation catalyst in divided form and a basic compound. The reaction can be conducted in a stirred reactor comprising an external loop for circulating the reaction mixture, allowing one portion of the hydrogenated products to be separated without withdrawing the catalyst, by using tangential filtration. The process may be especially useful in the hydrogenation of adiponitrile to an aminocapronitrile/hexamethylenediamine mixture.