A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. An amine, C02 and a water immiscible solvent are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and the amine that is soluble in both an aqueous and a solvent phase. The complex is extracted into the solvent phase which is than distilled to recover the acid or an ester of the acid in a concentrated form.
本方法揭示了一种从稀盐溶液中回收有机酸的方法,其中盐的阳离子形成不溶性
碳酸盐。向溶液中加入胺、
二氧化碳和不溶于
水的溶剂,以形成不溶性
碳酸盐和酸与胺之间的复合物,该复合物在
水相和溶剂相中均可溶解。复合物被萃取到溶剂相中,然后蒸馏以回收酸或酸的酯以浓缩形式。