Purification of .alpha.-, .beta.- or .gamma.-substituted carboxylic acids
AssigneeBASF SE
InventorsMarkus Frede, Christian Dully, Klaus Ditrich, Johann-Peter Melder, Hans-Jurgen Weyer, Achim Weitze
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Abstract
The process for purifying an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof from an aqueous solution which contains an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof and at least one polyol or at least one amino alcohol, wherein the solution is treated by electrodialysis.
Claims19
A process for purifying an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof from an aqueous solution which contains an .alpha.-, .beta.- or .gamma.-substituted carboxylic acid or a salt or an ester thereof or a mixture of two or more thereof and at least one polyol or at least one amino alcohol, wherein the solution is treated by electrodialysis.
Dependencies are inferred from the claim text.