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Title:
METHOD FOR PRODUCING HIGH PURITY OPTICALLY ACTIVE TARTARIC ACID DIALKYL ESTER
Document Type and Number:
Japanese Patent JP2014169233
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a high purity tartaric acid dialkyl ester having high purity with a high productivity.SOLUTION: The method for producing a high purity tartaric acid dialkyl ester includes (a first purification step) in which an aliphatic alcohol having an alkyl group with carbon atoms of 1-4 is added to an optically active tartaric acid containing 0.1% or more of malic acid and/or fumaric acid, then the resulting mixture is agitated in a solid-liquid two phase system, and thereafter, an optically active tartaric acid is recovered by solid-liquid separation, and (an esterification step) in which the same kind of aliphatic alcohol as the aliphatic alcohol used in the first purification step is reacted with the optically active tartaric acid. In the method, the content of a malic acid dialkyl ester is reduced to 0.1% or less and the content of a fumaric acid dialkyl ester is reduced to 0.1% or less.

Inventors:
MORIMOTO MASAO
NISHIMURA TOMOAKI
Application Number:
JP2013040644A
Publication Date:
September 18, 2014
Filing Date:
March 01, 2013
Export Citation:
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Assignee:
TORAY FINECHEMICALS CO LTD
International Classes:
C07C67/08; C07C69/70; C07B53/00
Domestic Patent References:
JP2014162758A2014-09-08
JP2012232974A2012-11-29
JP2003516928A2003-05-20
JP2001011016A2001-01-16
JP2001011015A2001-01-16
JP2014162758A2014-09-08
JP2012232974A2012-11-29
JP2003516928A2003-05-20
JP2001011016A2001-01-16
JP2001011015A2001-01-16
Attorney, Agent or Firm:
Clear stream international patent business corporation
Daytime Takayoshi
Shin-ichi Ogawa
Masateru Noguchi
Kenji Sato
Isao Hirai
Masao Sakaizawa



 
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