Factors influencing solvent selection for extraction of ethanol from aqueous solutions

Journal Article · Sat Dec 31 23:00:00 EST 1983 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200024a018· OSTI ID:6359674

Munson, C L; King, C J

Measurements of equilibrium distribution coefficients ((capacity) and separation factors selectivity with respect to water) are presented for extraction of ethanol from dilute aqueous solution by a number of different solvents and solvent mixtures. The results are interpreted in terms of the trade-off between capacity and selectivity. Among classes of solvents, Lewis acids have much more favorable combinations of capacity and selectivity than do Lewis bases. Branching is also favorable, a result which is rationalized through steric (cone angle) factors. Requirements for solvent selectivity can be ameliorated by the use of an extractive-distillation dewatering step, receiving the extract as feed. Other important solvent properties are its volatility in a distillative solvent-recovery step and the ease with which residual solvent may be removed from water by stripping or other means.

• Research Organization: Department of Chemical Engineering, University of California, Berkeley, California
• OSTI ID: 6359674
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 23:1; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

090221* -- Alcohol Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALCOHOLS
AQUEOUS SOLUTIONS
BASES
COMPARATIVE EVALUATIONS
DISPERSIONS
DISTILLATION
EQUILIBRIUM
ETHANOL
EXTRACTION
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
LEWIS ACIDS
LEWIS BASES
MIXTURES
ORGANIC COMPOUNDS
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
WATER REMOVAL