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:
Mar. 10, 2009
Filed:
Jul. 23, 2004
Applicants:
Jérôme Gerber, Lyons, FR;
Philippe Leconte, Meyzieu, FR;
Daniel Amoros, Venissieux, FR;
Inventors:
Assignee:
Rhodia Polyamide Intermediates, Saint-Fons, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/14 (2006.01); B01D 3/42 (2006.01); C07C 253/34 (2006.01); C07C 253/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a process for the manufacture and separation of dinitrile compounds. It relates more particularly to a process for the manufacture and separation of dinitrile compounds from a medium originating from the hydrocyanation of unsaturated mononitriles. The invention consists in feeding the medium comprising the dinitriles to a distillation column and then recovering the purified dinitriles as intermediate fraction, the heavy products being removed as column tail fraction and the light products, including the unsaturated mononitriles, being recovered as top fraction.