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. 13, 2024
Filed:
Jun. 08, 2020
Evonik Operations Gmbh, Essen, DE;
Jürgen Bilz, Freigericht, DE;
Cornelia Borgmann, Frankfurt, DE;
Achim Fischer, Goldbach, DE;
Lucas Geist, Freigericht, DE;
Anja Nordschild, Oberursel, DE;
Christian Renner, Gruendau, DE;
Christian Reus, Freigericht, DE;
Axel Ronneburg, Hanau, DE;
Evonik Operations GmbH, Essen, DE;
Abstract
The present invention relates to a process for the preparation of methionine comprising the step of contacting a solution or suspension comprising 2-amino-4-(methylthio)butanenitrile and/or 2-amino-4-(methylthio)butaneamide with water in the presence of a catalyst to give a methionine comprising mixture, wherein the catalyst comprises CeO2 comprising particles, wherein the CeO2 comprising particles have a BET surface area of from 175 to 300+/−10% m2/g measured according to DIN ISO 9277-5 (2003), a mean maximum Feret diameter x, mean of from 3+/−10% to 40+/−10% nm and a mean minimum Feret diameter x, mean of from 2+/−10% to 30+/−10% nm, both measured according to DIN ISO 9276-6 (2012).