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Separation of n‐hexane/acetone mixtures by pervaporation using natural rubber membranes
Author(s) -
Unnikrishnan G.,
Gedam P. H.,
Kishan Prasad V. S.,
Thomas Sabu
Publication year - 1997
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/(sici)1097-4628(19970627)64:13<2597::aid-app13>3.0.co;2-x
Subject(s) - membrane , permeation , pervaporation , hexane , natural rubber , acetone , solubility , peroxide , polymer chemistry , hildebrand solubility parameter , chemistry , selectivity , chemical engineering , materials science , chromatography , organic chemistry , biochemistry , engineering , catalysis
Natural rubber (NR) membranes crosslinked by four different systems viz., conventional (CV), efficient (EV), dicumyl peroxide (DCP), and a mixture consisting of sulfur and peroxide (mixed), were employed for the separation of n‐hexane/acetone mixtures of different compositions. The membranes exhibited preferential permeation toward n‐hexane because of the closer solubility parameter values. The selectivity of the membranes depended on the nature and distribution of crosslinks between the macromolecular chains of the membrane but was independent on the thickness of the membrane. The effects of feed composition, cure time of the membranes, and the molecular size of the permeate on the permeation flux and selectivity were investigated. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2597–2603, 1997