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:
Dec. 03, 2019
Filed:
Apr. 15, 2016
Applicant:
Adisseo France S.a.s., Antony, FR;
Inventors:
Nicolas Capelle, Corbas, FR;
Patrick Rey, Lyons, FR;
Assignee:
ADISSEO FRANCE S.A.S., Antony, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 319/20 (2006.01); C07C 319/28 (2006.01); C07B 41/02 (2006.01); C07C 323/58 (2006.01);
U.S. Cl.
CPC ...
C07C 319/20 (2013.01); C07B 41/02 (2013.01); C07C 319/28 (2013.01); C07C 323/58 (2013.01);
Abstract
The invention concerns a continuous process for manufacturing methionine by alkaline hydrolysis of methionine hydantoin in aqueous phase, removing NHand COof the hydrolysis medium, and neutralizing the obtained methioninate salt, according to which, after removal of NHand CO, the hydrolysis reaction medium is concentrated to precipitate NaCO, said NaCObeing separated then recycled for alkaline hydrolysis, the latter being carried out in the presence of NaOH and NaCO.