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Prevaporation of water/alcohol mixtures through the PVA membranes containing cyclodextrin oligomer
Author(s) -
Yamasaki Akihiro,
Ogasawara Keiichi,
Mizoguchi Kensaku
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070540705
Subject(s) - permeation , chemistry , ethanol , alcohol , propanol , oligomer , membrane , cyclodextrin , chromatography , nuclear chemistry , organic chemistry , biochemistry
Prevaporation through the PVA membrame containing β‐cyclodextrin oligomer (PVA/CD membrane) was performed for the mixtures of water/ethanol, water/1‐propanol, and water/2‐propanol. At higher alcohol concentrations, the water selectivities were greatly increased by CD for all the mixtures, in the order of 2‐propanol/water>1‐propanol/water>ethanol/water. The water permeation rate was decreased by CD, and the alcohol permeation rate was decreased much more for each mixture. At lower alcohol concentrations, the water selectivity for 1‐propanol/water was slightly increased by CD, and that for 2‐propanol/water was scarcely affeted, whereas that for ethanol/water was greatly increased. The water permeation rate was increased by CD for each mixture, and the relative increases in the water rates for propanols/water were smaller than that for ethanol/water. The permeation rate of 1‐propanol as well as that of ethanol was decreased by CD, but the rate of 2‐propanol was was increased. These effects of CD can be explained in terms of the inclusion strength. © 1994 John Wiley & Sons, Inc.