Untitled

YOSHIMASU, Shiro; NOMURA, Hitoshi; KOMIYA, Kyosuke; Okano, Teruo; Shinohara, Isao

doi:10.1246/nikkashi.1980.1785

Cited by 17 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the swelling ratio of the membrane of the mixture was large, the mobility of polymer segments increased and consequently, carbon tetrachloride started permeating the membrane in spite of its low affinity toward the membrane; this behavior is the so-colled "plasticizing effect. " 8 However, when using a membrane of the S series, the pervaporation rate of carbon tetrachloride was lower than the value anticipated from the membrane of the L series, and the selectivity was high in spite of the high HEA concentration. It is expected that a great change in the per- meability of the membrane may be closely related to the morphology of the microdomain structure, as illustrated in Figure 4.…”

Section: Permselectivity Of Hea-an Graft Copolymermentioning

confidence: 93%

Permselectivity of Liquid–Polymer Hybrid Membrane Composed of Carbon Tetrachloride and 2-Hydroxyethyl Acrylate– Acrylonitrile Graft Copolymer for Ethanol–Water Mixture

Itoh

Ohkawa

Ishihara

et al. 1983

Polym J

Self Cite

View full text Add to dashboard Cite

ABSTRACT:A membrane with selective permeability for ethanol was designed for the separation of ethanol from its aqueous solution by pervaporation on the basis of the difference in solubility between two components of the membrane. A liquid membrane was introduced to extend this difference and ethanol in the liquid membrane was isolated by the polymer membrane; that is, a liquid-polymer hybrid membrane was formed. Carbon tetrachloride was used as a liquid membrane, and 2-hydroxyethyl acrylate (HEA) (branch)-acrylonitrile (AN) (backbone) graft copolymer membrane was used as a polymer membrane. The effect of the microphase separated structure of the graft copolymer membrane on permselectivity was studied. The microdomain of the AN moiety displayed more dispersion and a smaller microdomain with decreasing chain length of the backbone polymer. It was found that the plasticizing effect was suppressed effectively by the microphase separated structure and the permselectivity of the graft copolymer membrane for ethanol was higher. When pervaporation of the ethanol-water mixture was carried out using the liquid-polymer hybrid membrane, ethanol completely permeated the liquid-polymer hybrid membrane.KEY Recently, a method has been found for ethanol production by the fermentation of starch, sugar, and cellulose. 1 This method requires a separation process, since ethanol is obtained in about a 5% aqueous solution. An enormous amount of energy is consumed by the distillation generally used for the separation of ethanol and this has prompted the development of a difference separation process. For a continuous and economical operation, a separation process using a polymer membrane has been found. This pervaporation method does not require isolation of the permeate and can be applied to various organic liquid mixtures. 2 Separation of an ethanol-water mixture using various polymer membranes by pervaporation has been reported. These generally involve water permeation through the membrane.3.4 However, it is more practical to permeate ethanol through the membrane since it is a minor component in the mixture produced by biomass.Permselectivity of the polymer membrane for the solvent takes place by two steps in the permeation process, i.e., dissolution and diffusion of the membrane. Therefore, the selectivity of a liquid mixture through the polymer membrane is a function of the difference in solubility and diffusivity of the solvents.5 However, in the case of ethanol permeation from an ethanol-water mixture, even if the solubility of ethanol toward the membrane is practical, the permselectivity of ethanol is not enhanced because of the poor diffusivity of ethanol owing to its molecular size. If a component with low diffusivity such as ethanol in an ethanol-water system is permeated selectively, it is necessary to design a 827

show abstract

Section: Permselectivity Of Hea-an Graft Copolymermentioning

confidence: 93%

Permselectivity of Liquid–Polymer Hybrid Membrane Composed of Carbon Tetrachloride and 2-Hydroxyethyl Acrylate– Acrylonitrile Graft Copolymer for Ethanol–Water Mixture

Itoh

Ohkawa

Ishihara

et al. 1983

Polym J

Self Cite

View full text Add to dashboard Cite

show abstract

“…The composition of the solvent was determined by gas chromatography and used to calculate the separation factor defined as ' Membrane no. 6 is a porous membrane.…”

Section: Solvent Composition In the Membranementioning

confidence: 99%

“…Figure 10 shows a typical scanning electron micograph of the surface of porous membrane no. 6. Figure 11 shows the swelling ratio and separation factor of membrane no.…”

Section: H E a T I N G T I M E ( H R )mentioning

confidence: 99%

See 1 more Smart Citation

Separation of liquid mixtures by using polymer membranes. I. Water–alcohol separation by pervaporation through PVA‐g‐MMA/MA membrane

Chiang

1991

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISA membrane was designed for the separation of a water-alcohol mixture by pervaporation on the basis of the difference in hydrogen-bonding interaction between two components of the membrane. Two kinds of poly (vinyl alcohol) -g-maleic anhydride/methyl methacrylate membrane were prepared by different methods: ( 1) A homogeneous membrane was formed by casting from dimethyl sulfoxide solution after purification. ( 2 ) A porous membrane was obtained directly by casting from the reaction solution, and then was purified. It is found that water was permeated through a homogeneous membrane preferentially in all ranges of feed compositions. Moreover, the flux was found to decrease with increasing PVA content in the membrane. The porous membrane after heat treatment has selective permeability for methanol. Pervaporation of water was investigated with respect to the feed concentration and also to the operating conditions. The effect of the molecular size of the permeating species on both permeation and separation is also discussed.

show abstract

“…[2][3][4][5][6][7][8][9][10][11] It has been reported that 2-hyTherefore, the properties of the materials for droxyethyl methacrylate-methyl acrylate graft comembrane preparation are very important, bepolymer 2 and 2-hydroxy-3-(diethylamino) propyl cause membrane function is greatly influenced by methacrylate-styrene with cyanuric chloride cotheir physical and chemical structure. polymer 3 membranes exhibited particularly exSeparation of benzene/cyclohexane mixtures is cellent benzene permselectivity for azeotropic industrially significant.…”

Section: Introductionmentioning

confidence: 99%

Effect of permeation temperature on permeation and separation of a benzene/cyclohexane mixture through liquid-crystalline polymer membranes

Inui

Miyata

Uragami

1998

J. Polym. Sci. B Polym. Phys.

View full text Add to dashboard Cite

Untitled

Cited by 17 publications

References 0 publications

Permselectivity of Liquid–Polymer Hybrid Membrane Composed of Carbon Tetrachloride and 2-Hydroxyethyl Acrylate– Acrylonitrile Graft Copolymer for Ethanol–Water Mixture

Permselectivity of Liquid–Polymer Hybrid Membrane Composed of Carbon Tetrachloride and 2-Hydroxyethyl Acrylate– Acrylonitrile Graft Copolymer for Ethanol–Water Mixture

Separation of liquid mixtures by using polymer membranes. I. Water–alcohol separation by pervaporation through PVA‐g‐MMA/MA membrane

Effect of permeation temperature on permeation and separation of a benzene/cyclohexane mixture through liquid-crystalline polymer membranes

Contact Info

Product

Resources

About