Patent · US Active

Method for producing methionine

US12187669B2 · kind B2 · utility

0Cited by

7References

9Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Daniel Sudhoff · Hanau, DE
Judith Hierold · Hannover, DE
Philipp Roth · Baden, CH
Imad Moussallem · Hanau, DE
Ulf Bindernagel · Cologne, DE
Christian Renner · Grundau, DE

Key dates

Filing date	Dec 13, 2019
Grant date	Jan 7, 2025
Priority date	—
Expiry date	Nov 9, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D233/76
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention pertains to a method for producing methionine or salts or derivatives thereof from hydrogen cyanide (HCN), the method comprising a step of producing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN), or a crude product mixture comprising MMP-CN, by contacting a hydrogen cyanide (HCN) process gas mixture prepared according to the Andrussow process from methane, ammonia and oxygen, with 3-methylmercaptopropionaldehyde (MMP), wherein the HCN process gas mixture is obtained from the crude HCN process gas mixture by adjusting the amount of ammonia to between 20% (v/v) and 60% (v/v) of the amount of the ammonia in the crude HCN process gas mixture.

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