Separation of citric acid from fermentation broth with a strongl

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

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 5148, C07C 5142

Patent

active

048515744

ABSTRACT:
Citric acid is separated from a fermentation broth by using an adsorbent comprising a strongly water-insoluble, macroreticular or gel, basis anionic exchange resin possessing quaternary amine functional groups, said a anionic exchange resin having a cross-linked acrylic or styrene resin matrix and a desorbent comprising 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: 2664441 (1953-12-01), Owens et al.
patent: 3040777 (1962-06-01), Carson et al.
patent: 3086928 (1963-04-01), Schulz
patent: 3983170 (1976-09-01), Sumikawa et al.
patent: 4323702 (1982-04-01), Kawabaten et al.
Separation of C.sub.8 Aromatics by Adsorption by A. J. DeRosset et al., presented at the American Chemical Society, Los Angeles, California, Mar. 28 thru Apr. 2, 1971.

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