Process for separating and recovering C4 dicarboxylic acids
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United States of America Patent
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Issued Date -
Jul 5, 2012
app pub date -
Jun 30, 2010
filing date -
Jul 1, 2009
priority date (Note) -
Abandoned
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Abstract
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.
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