Separation of lactic acid from fermentation broth with an anionic polymeric absorbent
US5068418A · kind A · utility
56Cited by
10References
13Claims
0Family size
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Key dates
| Filing date | May 8, 1989 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | May 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/47
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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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