Title:
METHOD FOR PRODUCING METHIONINE
Document Type and Number:
WIPO Patent Application WO/2018/199295
Kind Code:
A1
Abstract:
The present invention is a method for producing methionine which includes a crystallization step in which carbon dioxide is introduced into a liquid reaction mixture containing an alkali salt of methionine and obtained by hydrolyzing 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione in the presence of an alkali compound, thereby precipitating the methionine, the method for producing methionine further including a step in which waste methionine is added to the liquid reaction mixture. According to the production method of the present invention, the methionine yield in production thereof can be improved.
Inventors:
SATOH YOSHITAKA (JP)
OMOTO NORIHITO (JP)
KOIZUMI YOSHIYUKI (JP)
YAMASHIRO NAOYA (JP)
KATAGAMI RYOUSUKE (JP)
OMOTO NORIHITO (JP)
KOIZUMI YOSHIYUKI (JP)
YAMASHIRO NAOYA (JP)
KATAGAMI RYOUSUKE (JP)
Application Number:
PCT/JP2018/017212
Publication Date:
November 01, 2018
Filing Date:
April 27, 2018
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
C07C319/28; C07C319/20; C07C323/58
Foreign References:
| JP2010111641A | 2010-05-20 | |||
| JP2001340098A | 2001-12-11 | |||
| JP2013173717A | 2013-09-05 | |||
| JP2017087752A | 2017-05-25 | |||
| JP2010111641A | 2010-05-20 |
Other References:
See also references of EP 3617189A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
Download PDF:
Previous Patent: METHIONINE PRODUCTION METHOD AND PRODUCTION EQUIPMENT
Next Patent: METHIONINE PRODUCTION METHOD AND PRODUCTION EQUIPMENT
Next Patent: METHIONINE PRODUCTION METHOD AND PRODUCTION EQUIPMENT