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:
Oct. 13, 2020
Filed:
May. 09, 2018
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Daniel Fischer, Midlothian, VA (US);
Patrik Stenner, Hanau, DE;
Sebastian Bernhardt, Aschaffenburg, DE;
Harald Jakob, Hasselroth, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 319/20 (2006.01); C07C 319/14 (2006.01); C07C 319/28 (2006.01); C07C 323/58 (2006.01);
U.S. Cl.
CPC ...
C07C 319/20 (2013.01); C07C 319/14 (2013.01); C07C 319/28 (2013.01); C07C 323/58 (2013.01);
Abstract
A process is used for preparing methionine. Specifically, the process includes the hydrolysis of 5-(2-methylmercaptoethyl)hydantoin (methionine hydantoin) in an alkaline process solution. Further, the by-products that include formate and other anions of organic acids containing 1 to 5 carbon atoms are removed by electrodialysis of the process solution.