05068418 is referenced by 45 patents and cites 12 patents.

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.

Title
Separation of lactic acid from fermentation broth with an anionic polymeric absorbent
Application Number
7/349272
Publication Number
5068418
Application Date
May 8, 1989
Publication Date
November 26, 1991
Inventor
Anil R Oroskar
Downers Grove
IL, US
Santi Kulprathipanja
Inverness
IL, US
Agent
Jack H Hall
John F Spears Jr
Thomas K McBride
Assignee
UOP
IL, US
IPC
C07C 51/42
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