Polymer Membrane as a Reaction Field II. Effect of Membrane Environment on Permselectivity for Water–Ethanol Binary Mixtures

Pervaporative desulfurization of gasoline: A review

“…In addition, a good interaction between the membrane and preferably one of the components in the mixture is required for the appropriate separation. Hence, the solubility parameter and the membrane polarity are the two interested indices in the design of news membranes [57,58]. The choice of membrane for the pervaporation process also depends strongly on the components to be separated.…”

Specialty polymeric membranes. V. Selective permeation of carbon dioxide through synthetic polymeric membranes having 2‐(N,N‐dimethyl)aminoethoxycarbonyl moiety

“…14 The following three relationships have already been reported as practical applications of this membrane polarity: ( 1 ) the permselectivities for piezodialysis of the binary system K+-Li + through common polymeric membranes are closely related to the membrane polarities;26 ( 2) the mechanism and selectivity of transport of anionic substances such as halogen ions, 27,28 organic acids, 29 and amino acids, 30 through synthetic polymeric membranes bearing heterocyclic compounds as fixed carriers are determined by the membrane polarities; ( 3 ) the separation factors for the separation of water /various alcohol mixtures, especially, water/ethanol mixture, through synthetic polymeric membranes by pervaporation showed good correlation to the membrane polarities. [31][32][33][34][35] The membrane polarities of these four kinds of membranes are summarized in Table IV. From and the experimental data shown in Figure 1.…”

Separation of Water and Ethanol by Pervaporation through Polymer Membranes Containing N-Substituted Imide Groups

“…A 250 g dm - 3 -Py solution of poly(l-co-2) and a 150 g dm-3 -cyclohexanone solution of 7 were poured onto glass plates using a glass rod and a ca. 0.15 mm spacer.…”

“…2 Not only the number of functional groups, which interact preferentially with water in the membrane, but also the environment (membrane polarity) surrounding the functional groups have been found to determine the separation characteristics of water-alcohol (ethanol) binary mixtures. 3 In the present paper, attention is focussed on the N-substituted imide group as a carrier and poly(N-phenylmaleimide-co-styrene)s and the polymer containing the N-substituted phthalimide group as a side chain. The permeation and separation of water-ethanol mixtures through these polymer membranes are discussed.…”