PROCESS FOR THE PURIFICATION OF ORGANIC ACIDS

摘要

A process for recovery and purification of an organic acid from a fermentation broth containing a salt form of the organic acid, comprises the steps of subjecting the fermentation broth to one of ultrafiltration and microfiltration to form a first permeate, concentrating the first permeate to form a concentrated broth, subjecting the concentrated broth to a supported liquid membrane for extraction of lactic acid into a separate stream comprising an extracted solution, subjecting the extracted solution to activated carbon for colour removal,a cation exchange resin for demineralization, and an anion exchange resin for removal of anionic impurities to form a post polished organic acid, filtering the post polished organic acid to remove impurities above a predetermined threshold and concentrating the post polished organic acid to a desired concentration. Fig. 1.