Separation of citric acid from fermentation broth with a strongly basic anionic exchange resin adsorbent
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United States of America Patent
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Jul 25, 1989
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N/A
app pub date -
Nov 16, 1987
filing date -
Dec 18, 1986
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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.
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