Extraction chemistry of fermentation product carboxylic acids
Within the framework of a program aiming to improve the existing extractive recovery technology of fermentation products, the state of the art is critically reviewed. The acids under consideration are propionic, lactic, pyruvic, succinic, fumaric, maleic, malic, itaconic, tartaric, citric, and isocitric, all obtained by the aerobic fermentation of glucose via the glycolytic pathways and glyoxylate bypass. With no exception, it is the undissociated monomeric acid that is extracted into carbon-bonded and phosphorus-bonded oxygen donor extractants. In the organic phase, the acids are usually dimerized. The extractive transfer process obeys the Nernst law, and the measured partition coefficients range from about 0.003 for aliphatic hydrocarbons to about 2 to 3 for aliphatic alcohols and ketones to about 10 or more for organophosphates. Equally high distribution ratios are measured when long-chain tertiary amines are employed as extractants, forming bulky salts preferentially soluble in the organic phase.
- Research Organization:
- Lawrence Berkeley Lab., CA
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6006576
- Journal Information:
- Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 28:2; ISSN BIBIA
- Country of Publication:
- United States
- Language:
- English
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090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
AEROBIC DIGESTION
ALDEHYDES
BIOCONVERSION
BIOLOGICAL PATHWAYS
CARBOHYDRATES
CARBOXYLIC ACIDS
DIGESTION
FERMENTATION
GLUCOSE
HEXOSES
MANAGEMENT
MONOSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PROCESSING
SACCHARIDES
WASTE MANAGEMENT
WASTE PROCESSING
YIELDS