Separation of lactic acid from fermentation broth with an anioni

Details Separation of lactic acid from fermentation broth with an anioni Separation of lactic acid from fermentation broth with an anioni

1989-05-08

1991-11-26

Gray, Bruce

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

Organic compounds

Carboxylic acids and salts thereof

562589, C07C 5142

Patent

active

050684183

ABSTRACT:
Lactic 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 or pyridine functional groups or a strongly basic anionic exchange resin possessing quaternary amine fuctional groups. The resins are in sulfate form and have a cross-linked acrylic or styrene resin matrix. Lactic acid is desorbed with water or dilute inorganic acid, e.g., sulfuric. The pH of the feed is maintained below the ionization constant (pKa) of lactic acid to obtain high selectivity.

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