Pervaporation separation of aqueous alcohol solution through asymmetric polycarbonate membrane

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399408002472· OSTI ID:5069305

Lee, K R; Liu, M J; Lai, J Y ^[1]

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1. Chung Yuan Univ., Chung Li (Taiwan, Province of China)

In the present work the separation of aqueous alcohol mixtures through wet-phase inversion prepared polycarbonate membranes was studied by using the pervaporation process. The formation of asymmetric pervaporation membranes was discussed in terms of the presence of a nonsolvent in the casting solution, the polycarbonate concentration, and the kinds of coagulation media. The effects of feed composition, swelling degree, and the size of the alcohols on the pervaporation performances were investigated. The rate of liquid-liquid demixing increases with a decreasing number of carbon atoms of the alcohol coagulation medium. The permeation rate of the pervaporation process for the nonsolvent-added membrane was much higher than that of the membrane without nonsolvent additive. In binary alcohol mixtures, the permselectivities of small-sized alcohols through the asymmetric membrane are decided by two factors: preferential solubility of larger-sized alcohol and predominant diffusivity of small-sized alcohol. 19 refs., 8 figs., 6 tabs.

• OSTI ID: 5069305
• Journal Information: Separation Science and Technology; (United States), Vol. 29:1; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALCOHOLS
SEPARATION PROCESSES
MEMBRANES
FABRICATION
PERMEABILITY
BUTANOLS
ETHANOL
EVAPORATION
EXPERIMENTAL DATA
METHANOL
METHYLENE CHLORIDE
MIXTURES
POLYCARBONATES
PROPANOLS
CARBON COMPOUNDS
CARBONATES
DATA
DISPERSIONS
HYDROXY COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
090900* - Biomass Fuels- Processing- (1990-)
400105 - Separation Procedures