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A zeolite/polymer membrane for separation of ethanol‐water azeotrope
Author(s) -
Goldman Mariana,
Fraenkel Dan,
Levin Gideon
Publication year - 1989
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.1989.070370704
Subject(s) - pervaporation , azeotrope , zeolite , membrane , polymer , chemical engineering , ethanol , materials science , phase (matter) , chemistry , polymer chemistry , organic chemistry , catalysis , permeation , biochemistry , distillation , engineering
A novel membrane effective in the separation of ethanol‐water mixtures by pervaporation was made by combining zeolite NaA and poly(vinyl chloride) modified by 2‐(2′‐butoxyethoxy)ethyl thiolate. Under ambient conditions, a separation factor (α H 2 O ) of 29 and pervaporability ( P H 2 O ) of 4 × 10 −4 g m −1 h −1 were obtained for the azeotropic mixture whereas, in the absence of zeolite, the respective values were 7 and 7 × 10 −5 . A mechanism was proposed relating the preferential water transport at ≈ 50% zeolite content to an interfacial “phase” between the zeolite and the modified polymer.