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Title:
METHOD OF PRODUCING ALIPHATIC DICARBOXYLIC ACID CONTAINING LIQUID
Document Type and Number:
Japanese Patent JP2015083551
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing an aliphatic dicarboxylic acid containing liquid which enables obtaining a liquid containing an aliphatic dicarboxylic acid efficiently and stably from an aqueous solution containing an aliphatic dicarboxylic acid and an inorganic salt without use of excess solvent and/or electric power.SOLUTION: A method of producing an aliphatic dicarboxylic acid containing liquid comprises supplying a stock solution (A) containing an aliphatic dicarboxylic acid and an inorganic salt to the desalination chambers of an electrodialyzer which has desalination chambers formed by arranging a plurality of anion exchange membranes and cation exchange membranes alternately between electrodes and forming desalination chambers, alternately in order, between the anion exchange membranes and the cation exchange membranes and a concentration chamber and supplying a concentrated solution to the concentration chamber to carry out electrodialysis so as to obtain a liquid containing an aliphatic dicarboxylic acid. The ratio of undissociated aliphatic dicarboxylic acids to all the aliphatic dicarboxylic acids in the stock solution (A) is 70 mol%.

Inventors:
TAKAHASHI TAKESHI
TAKASHIMA YOSHINARI
MORI YOSHIAKI
AOYAMA RYUSUKE
Application Number:
JP2013222494A
Publication Date:
April 30, 2015
Filing Date:
October 25, 2013
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP
International Classes:
C07C51/42; B01D61/44; B01D61/54; C07C55/10
Domestic Patent References:
JPH11178534A1999-07-06