METHOD FOR MANUFACTURING METHIONINE

Title:

METHOD FOR MANUFACTURING METHIONINE

Document Type and Number:

WIPO Patent Application WO/2019/124370

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide a method for manufacturing methionine, whereby enhanced efficiency of ammonia removal can be achieved. This manufacturing method includes a removal step for reacting 3-methylmercaptopropionaldehyde and hydrocyanic acid, or a compound obtained by reacting the same, with carbon dioxide and ammonia and obtaining a liquid including 5-(2-methylmercaptoethyl)hydantoin, then supplying a liquid including a methionine salt obtained by hydrolysis of the 5-(2-methylmercaptoethyl)hydantoin to a stripping tower from a top part thereof and supplying a stripping gas to the stripping tower from a bottom part thereof, and removing the ammonia included in the liquid by stripping, the stripping gas including a process gas generated by the methionine manufacturing process.

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Inventors:

MIZUNO TAKAO (JP)
YAMASHITA DAISUKE (JP)
KOIZUMI YOSHIYUKI (JP)

Application Number:

PCT/JP2018/046554

Publication Date:

June 27, 2019

Filing Date:

December 18, 2018

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO (JP)

International Classes:

C07C319/20; C07C319/28; C07C323/58

Domestic Patent References:

WO2016170252A1

2016-10-27

Foreign References:

JP2014108956A	2014-06-12
CN103724242A	2014-04-16
CN102659650A	2012-09-12
JP2015526485A	2015-09-10
JP2017242874A	2017-12-19
JP2006206534A	2006-08-10

Other References: