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Title:
メチオニンの製造方法および製造設備
Document Type and Number:
Japanese Patent JP7150704
Kind Code:
B2
Abstract:
The present invention provides a method for producing methionine characterized by comprising a step of hydrolyzing 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione in the presence of an alkali compound to obtain a reaction solution containing an alkali salt of methionine, a step of precipitating methionine by introducing carbon dioxide into the reaction solution to obtain a first slurry containing the methionine, a step of allowing the first slurry to flow into a pressurized filter and obtaining the solid methionine and mother liquor from the first slurry, and a step of recovering carbon dioxide from the mother liquor. By the present production method, the carbon dioxide introduced in the crystallization step is suppressed from being released from the mother liquor, and the carbon dioxide can be recovered.

Inventors:
Nobuhito Ohmoto
Yoshitaka Sato
Masayuki Morikawa
Yoshiyuki Koizumi
Naoya Yamashiro
Ryosuke Katakami
Application Number:
JP2019514657A
Publication Date:
October 11, 2022
Filing Date:
April 27, 2018
Export Citation:
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Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C07C319/20; B01D9/02; C07C319/28; C07C323/58
Domestic Patent References:
JP200763141A
JP2015515458A
JP60108357A
JP2015140342A
JP2010111641A
Attorney, Agent or Firm:
Michiko Matsutani
Sei Morimoto