Title:
PROCESS FOR PRODUCING 2-HYDROXY-4-METHYLTHIOBUTANOIC ACID
Document Type and Number:
WIPO Patent Application WO/2002/008181
Kind Code:
A1
Abstract:
A process for producing 2-hydroxy-4-methylthiobutanoic acid which comprises hydrating 2-hydroxy-4-methylthiobutanenitrile in the presence of sulfuric acid, hydrolyzing the 2-hydroxy-4-methylthiobutanamide contained in the reaction mixture, subsequently separating the resultant reaction mixture into an oil layer containing 2-hydroxy-4-methylthiobutanoic acid and an aqueous layer, and circulating part of the aqueous layer to the hydrolysis step and/or the oil/water separation step. By the process, 2-hydroxy-4-methylthiobutanoic acid can be efficiently obtained in a satisfactory manner without using an organic solvent.
Inventors:
IKUDOME KENJI (JP)
SHIOZAKI TETSUYA (JP)
OTANI TAKEHIRO (JP)
SUDO SHOGO (JP)
SHIOZAKI TETSUYA (JP)
OTANI TAKEHIRO (JP)
SUDO SHOGO (JP)
Application Number:
PCT/JP2001/005982
Publication Date:
January 31, 2002
Filing Date:
July 09, 2001
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
IKUDOME KENJI (JP)
SHIOZAKI TETSUYA (JP)
OTANI TAKEHIRO (JP)
SUDO SHOGO (JP)
IKUDOME KENJI (JP)
SHIOZAKI TETSUYA (JP)
OTANI TAKEHIRO (JP)
SUDO SHOGO (JP)
International Classes:
C07C319/20; C07C319/28; C07C323/52; C07C323/60; (IPC1-7): C07C323/52; C07C319/20
Domestic Patent References:
| WO2000046190A1 | 2000-08-10 | |||
| WO1994028717A1 | 1994-12-22 | |||
| WO1996040630A1 | 1996-12-19 | |||
| WO2000002852A1 | 2000-01-20 |
Foreign References:
| US4524077A | 1985-06-18 |
Attorney, Agent or Firm:
Kuboyama, Takashi c/o Sumitomo Chemical Intellectual Property Service (Limited 5-33 Kitahama 4-chom, Chuo-ku Osaka-shi Osaka, JP)
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