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:
Feb. 08, 2022
Filed:
Mar. 09, 2018
Applicant:
Adisseo France S.a.s., Antony, FR;
Inventors:
Virginie Belliere-Baca, Millery, FR;
Didier Morvan, Mornant, FR;
Assignee:
ADISSEO FRANCE S.A.S., Antony, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 319/12 (2006.01); C07C 319/28 (2006.01); C07C 323/52 (2006.01);
U.S. Cl.
CPC ...
C07C 323/52 (2013.01); C07C 319/12 (2013.01); C07C 319/28 (2013.01);
Abstract
A method for manufacturing 2-hydroxy-4-(methylthio)butyric acid (HMTBA) from 2-hydroxy-4-methylthio-butyronitrile (HMTBN), where HMTBN is hydrolyzed into HMTBA in the presence of a mineral acid in an aqueous medium, the medium is neutralized by addition of a base, a first phase including at least HMTBA and salts and a second phase containing salts are separated, the method including the separation of the HMTBA from the salts of the first phase, by subjecting the latter to a chromatography.