PROCESS FOR SEPARATING AND RECOVERING C4 DICARBOXYLIC ACIDS

摘要

The present invention relates to processes for separating and recovering the C4 dicarboxylic acid, comprising: (a) subjecting an aqueous solution comprising a salt of the C4 dicarboxylic acid to concentrating electrodialysis to concentrate the salt of the C4 dicarboxylic acid in the aqueous solution; and (b) subjecting the resulting concentrate to bipolar membrane electrodialysis to convert the salt of the C4 dicarboxylic acid into the free acid of the C4 dicarboxylic acid.