PROCESS FOR PREPARING 2-HYDROXY-4-METHYLTHIOBUTANOIC ACID

Title:

PROCESS FOR PREPARING 2-HYDROXY-4-METHYLTHIOBUTANOIC ACID

Document Type and Number:

WIPO Patent Application WO/2001/060791

Kind Code:

A1

Abstract:

A process for preparing 2-hydroxy-4-methylthiobutanoic acid by hydrolyzing 2-hydroxy-4-methylthiobutanenitrile and/or 2-hydroxy-4-methylthiobutanamide in the presence of sulfuric acid to thereby obtain a reaction fluid containing 2-hydroxy-4- methylthiobutanoic acid, mixing this reaction fluid with a basic alkali metal compound to form a mixed fluid composed of an oil layer containing 2-hydroxy-4-methylthiobutanoic acid and an aqueous layer, and recovering the oil layer from the mixed fluid. This process enables the efficient preparation of 2-hydroxy-4-methylthiobutanoic acid without an organic solvent with good operating properties.

Inventors:

IKUDOME KENJI (JP)
SHIOZAKI TETSUYA (JP)

Application Number:

PCT/JP2001/000401

Publication Date:

August 23, 2001

Filing Date:

January 22, 2001

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO (JP)
IKUDOME KENJI (JP)
SHIOZAKI TETSUYA (JP)

International Classes:

C07B61/00; C07C319/20; B01J27/02; C07C319/28; C07C323/52; (IPC1-7): C07C319/20; C07C323/52

Domestic Patent References:

WO1996040630A1

1996-12-19

Foreign References:

US4912257A	1990-03-27
US4524077A	1985-06-18

Other References: