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Title:
METHOD FOR PRODUCING β-MERCAPTOCARBOXYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2013/076969
Kind Code:
A1
Abstract:
This method for producing a β-mercaptocarboxylic acid involves: a step (a) of obtaining a reaction solution including a compound represented by general formula (2) and a compound represented by general formula (3) by reacting a compound represented by the formula X1 2S (wherein X1 represents hydrogen, Na, or K) or a compound represented by the formula X2SH (wherein X2 represents Na or K), an alkali hydroxide represented by the formula X3OH (wherein X3 represents Na or K), and an unsaturated carboxylic acid represented by general formula (1); a step (b) of obtaining a reaction solution including a β-mercaptocarboxylic acid represented by general formula (4) and a compound represented by general formula (5) by neutralizing the reaction solution obtained in said step (a) with an acid; a step (c) of obtaining the β-mercaptocarboxylic acid represented by general formula (4) by purifying, by distillation, the reaction solution obtained in said step (b); and a step (d) of returning, to said step (a), the distillation residue of said step (c) including the compound represented by general formula (5).

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Inventors:
FURUYA MASAYUKI (JP)
OGAWA TATSUYA (JP)
NISHIMURA TAKESHI (JP)
Application Number:
PCT/JP2012/007452
Publication Date:
May 30, 2013
Filing Date:
November 20, 2012
Export Citation:
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Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C07C319/04; C07C319/28; C07C321/04; C07C321/14
Domestic Patent References:
WO2010095745A12010-08-26
WO2010095745A12010-08-26
Foreign References:
JP2000501723A2000-02-15
JPH049363A1992-01-14
JPH02121962A1990-05-09
JP2001187778A2001-07-10
JPS4015170B
JPH04273851A1992-09-30
JPS5236623A1977-03-22
JPS61254555A1986-11-12
JPS5929655A1984-02-16
JP2001187778A2001-07-10
JP2000501723A2000-02-15
JPH02121962A1990-05-09
JPH049363A1992-01-14
Other References:
See also references of EP 2784063A4
Attorney, Agent or Firm:
HAYAMI, SHINJI (JP)
Shinji Hayami (JP)
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Claims:



 
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