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Chloride‐sulfate equilibria and transport processes in benzidine‐formaldehyde and other anion‐permeable membranes
Author(s) -
Gregor Harry P.,
Bruins Paul F.,
Kramer Richard M.
Publication year - 1966
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.1966.070100513
Subject(s) - membrane , chemistry , benzidine , chloride , sulfate , inorganic chemistry , selectivity , ion exchange , diffusion , ammonium , oxalate , ion , ionic bonding , ammonium chloride , organic chemistry , catalysis , thermodynamics , biochemistry , physics
Exchange equilibria, ohmic resistances, concentration and bi‐ionic potentials, diffusion coefficients, and transport numbers were measured for the chloride–sulfate–oxalate system in anion‐permeable membranes with quaternary ammonium and benzidine exchange sites. The benzidine membranes showed a greater selectivity for sulfate than chloride as compared with the quaternary ammonium membranes, but a lower transport number. These phenomena were interpreted in terms of an ion‐binding mechanism. Fair agreement was observed between measured transport numbers and those calculated from selectivity coefficients, diffusion coefficients, and equivalent conductances.