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. 01, 2005
Filed:
Jan. 08, 2003
Applicants:
Carl Henry Behrens, Newark, DE (US);
James Joseph Mencel, North Wales, PA (US);
Inventors:
Carl Henry Behrens, Newark, DE (US);
James Joseph Mencel, North Wales, PA (US);
Assignee:
Rhodia Chirex, Inc., Boston, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C253/16 ;
U.S. Cl.
CPC ...
Abstract
A process for making a water-soluble β-hydroxynitrile. A 1,2-epoxide and an inorganic cyanide salt are reacted in a solvent having aqueous methanol and a buffer therein to form β-hydroxynitrile. The buffer substantially inhibits the formation of reaction products other than β-hydroxynitrile. Optionally, water may be removed from the β-hydroxynitrile by azeotropic distillation with acetonitrile and subsequently purified via vacuum distillation and filtration.