Evonik Operations Gmbh

Evonik Degussa Gmbh

Daniel Fischer

Harald Jakob

Brigitte Bathe

Arne Skerra

Hans Joachim Hasselbach

Patrik Stenner

Philipp Roth

Martin Steurenthaler

Judith Hierold

Thorsten Merker

Ines Ochrombel

Christian Kaiser

Sebastian Bernhardt

Daniel Sudhoff

Markus Held

Marleen Hasselmeyer

Michael Hampel

Joanne Pedall

Julia Martin

The present invention relates to a method for producing L-methionine in which a microorganism is cultured in the presence of L-homoserine and methyl mercaptan, a salt of the same or dimethyl disulfide whereby the L-methionine is accumulated in the culture medium.

Method for producing L-methionine

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.

Method for preparing methionine

The invention relates to an enzymatic method for producing 2-hydroxy-4-methylmercaptobutanoic acid from 3-methylthio-propanal (3-methylmercaptopropanal (MMP) or 'methional') and carbon dioxide.

Enzymatic method for producing 2-hydroxy-4-methylmercaptobutanoic acid (MHA)

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.

Process for preparing methionine

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Midlothian, VA, United States of America

Daniel Fischer