Patent · US Active

Method for preparing methionine

US10899706B2 · kind B2 · utility

2Cited by

1References

20Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Judith Hierold · Hannover, DE
Daniel Sudhoff · Hanau, DE
Martin Steurenthaler · Singapore, SG
Hans Joachim Hasselbach · Gelnhausen, DE
Philipp Roth · Baden, CH
Thorsten MERKER · Lechenich, DE
Markus Held · Limeshain, DE
Daniel Fischer · Midlothian, US
Christian Kaiser · Waldaschaff, DE

Key dates

Filing date	Dec 15, 2017
Grant date	Jan 26, 2021
Priority date	—
Expiry date	Dec 15, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D241/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a method for preparing methionine or methionine salts. In particular, the invention describes the step of preparing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN) from 3-methylthiopropanal (MMP) and hydrogen cyanide (HCN) in the presence of ammonia by bringing a gaseous mixture comprising HCN and ammonia into contact with MMP.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.