Separation of citric acid from fermentation broth with a weakly

Details Separation of citric acid from fermentation broth with a weakly Separation of citric acid from fermentation broth with a weakly

1987-11-16

1989-07-25

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5142

Patent

active

048515736

ABSTRACT:
Citric acid is separated from a fermentation broth by using an adsorbent comprising a water-insoluble macroreticular or gel weakly basic anionic exchange resin possessing tertiary amine functional groups or pyridine functional groups, said anionic exchange resin comprising a cross-linked acrylic or styrene resin matrix. Citric acid is desorbed by water or dilute sulfuric acid. The pH of the feed is maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity.

REFERENCES:
patent: 4323702 (1982-04-01), Kowabata et al.

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