59-51-8Relevant articles and documents
METHOD FOR PRODUCING METHIONINE
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, (2021/03/13)
An object of the present invention to provide a method for producing methionine with consideration given to the environment. The production method of the present invention comprises a removal step of blowing an inert gas into a liquid containing 5-(2-methylmercaptoethyl)hydantoin and thereby diffusing ammonia remaining in the liquid to obtain an emission gas containing the ammonia, and a recovery step of bringing the emission gas into contact with a washing liquid to recover ammonia contained in the emission gas.
STORAGE-STABLE FORM OF 3-METHYLTHIOPROPIONALDEHYDE
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Paragraph 0058-0059, (2021/11/13)
A chemical compound of formula (I), and specific compositions including 3-methylthiopropionaldehyde, 3-methylthiopropane-1,1-diol, a compound of formula I and water, and processes for producing same and also the use of same may be used for the production of 2-hydroxy-4-(methylthio)butyronitrile, methionine hydantoin, methionine. Protected forms may be used for the storage and/or transport of 3-methylthiopropionaldehyde.
SALT-FREE PRODUCTION OF METHIONINE FROM METHIONINE NITRILE
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, (2020/08/22)
The invention refers to the use of a particulate catalyst containing 60.0 to 99.5 wt.% ZrO2 stabilised with an oxide of the element Hf and at least one oxide of the element M, wherein M = Ce, Si, Ti, or Y, for the hydrolysis reaction of methionine amide to methionine, wherein the median particle size x50 of the particulate catalyst is in the range of from 0.8 to 9.0 mm, preferably of from 1.0 to 7.0 mm. The invention also refers to a process for preparing methionine comprising a step of contacting a solution or suspension comprising methionine amide and water with said particulate catalyst to provide a reaction mixture comprising methionine and/or its ammonium salt from which methionine can be isolated.