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:
Aug. 12, 2014
Filed:
Aug. 14, 2012
Applicant:
Jelena Cirakovic, Wilmington, DE (US);
Inventor:
Jelena Cirakovic, Wilmington, DE (US);
Assignee:
E I du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 253/30 (2006.01); C07C 253/14 (2006.01); C07C 255/12 (2006.01); C08G 63/44 (2006.01); C08G 63/40 (2006.01); C08G 73/18 (2006.01); C08G 73/06 (2006.01);
U.S. Cl.
CPC ...
C07C 253/14 (2013.01); C07C 253/14 (2013.01); C07C 255/12 (2013.01);
Abstract
A high yield and high productivity processes for preparing 3-hydroxyglutaronitrile by reacting an epihalohydrin or a 4-halo-3-hydroxy-butanenitrile, or analogous compound containing a different leaving group, with cyanide (CN—) in the presence of water and an ionic liquid. The use of an ionic liquid as a cosolvent with water results in increased productivity and selectivity.