Patents Represented by Attorney Jack F. Spears, Jr.
  • Patent number: 4851574
    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.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 25, 1989
    Assignee: UOP Inc.
    Inventor: Santi Kulprathipanja