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Permselectivities of some aromatic compounds in organic medium through cellulose acetate membranes by reverse osmosis
Author(s) -
Nomura Hiroshi,
Yoshida S.,
Senō M.,
Takahashi H.,
Yamabe T.
Publication year - 1978
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.1978.070220917
Subject(s) - chemistry , partition coefficient , membrane , cellulose acetate , naphthalene , benzene , anthracene , chromatography , permeation , phenol , organic chemistry , biochemistry
Reverse osmosis of some aromatic compounds in 1‐propanol solution using porous cellulose acetate membranes and some factors which influence the organic solute permeability were investigated. Reverse osmosis data for a number of benzene derivatives showed that only phenol was rejected and the others were enriched. For the compounds with various substituent groups, the solute permeabilities have the following order; OH < CH 3 < H < Cl < NH 2 < NO 2 . In the series of benzene, naphthalene, and anthracene, the permeability is related to the molar volume of solutes and varied as follows: benzene < naphthalene < anthracene. Generally speaking, there are two factors—a partition coefficient and a diffusion coefficient—for governing the permeation behavior through the membrane. Under the condition that no steric effect is exerted, the partition coefficient exclusively is a dominant factor. A good correlation between the partition coefficient of a particle and that of the membrane was pound. The partition coefficients are closely related to the dipole moment of solutes.