Process for the purification of alkane dicarboxylic acids having at least 4 carbon atoms

摘要

Alkane dicarboxylic acids of at least 4 carbon atoms particularly the mixture of succinic, glutaric and adipic acids obtained as byproduct in the manufacture of adipic acid are purified by co-distillation with an alkylbenzene having an atmospheric pressure boiling point of 300° to 350°C especially dodecylbenzene.