Separation of citric acid from fermentation broth with a...

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

C - Chemistry, Metallurgy

07

C

260/533.1

C07C 51/47 (2006.01) C07C 59/265 (2006.01)

Patent

CA 1303061

"SEPARATION OF CITRIC ACID FROM FERMENTATION BROTH WITH A NON-ZEOLlTE POLYMERIC ADSORBENT' ABSTRACT Citric acid is separated from a fermentation broth by using a water- insoluble polymeric adsorbent selected from the group consisting of a neutral, crosslinked polystyrene polymer, a nonionic hydrophobic polyacrylic polyacrylicester polymer, a weakly basic anionic exchange resin possessing tertiary amine or pyridine functional groups, and a strongly basic anionic exchange resin possessing quaternary amine functional groups and mixtures thereof and a desorbent comprising water or an inorganic acid or a ketone or mixtures thereof. The pH of the feed is preferentially adjusted and maintained below the first ionization constant (pKal) of citric acid in order to maintain selectivity.

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