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. 16, 2021
Filed:
May. 08, 2018
Evonik Operations Gmbh, Essen, DE;
Sebastian Bernhardt, Aschaffenburg, DE;
Martin Körfer, Kahl, DE;
Stefan Reichert, Frankfurt, DE;
Hans-Joachim Hasselbach, Gelnhausen, DE;
Bernd Drapal, Alzenau, DE;
Rainer Peter, Krombach, DE;
Christian Kaiser, Waldaschaff, DE;
Benny Hartono, Singapur, SG;
Harald Jakob, Hasselroth, DE;
Evonik Operations GmbH, Essen, DE;
Abstract
A process for preparing methionine includes the alkaline hydrolysis of 5-(2-methylmercaptoethyl)-hydantoin (methionine hydantoin) in an aqueous process solution containing alkali metal hydroxide and/or alkali metal carbonate and/or alkali metal hydrogencarbonate. The alkali metal cations in the process solution are potassium and sodium having a K/Na molar ratio range from 99/1 to 20/80.