Process for the purification of organic acids

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 51/42 (2006.01) B01D 11/04 (2006.01) B01D 15/04 (2006.01) B01D 61/02 (2006.01) B01D 61/14 (2006.01) B01D 61/38 (2006.01) C12P 7/40 (2006.01) C12P 7/56 (2006.01)

Patent

CA 2706205

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.

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