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pervaporation separation OF WATER-ACETIC ACID MIXTURES THROUGH AN-co-AA MEMBRANES TREATED WITH RARE EARTH METAL IONS

引用

Chinese Journal of Polymer Science 1995年第2期13卷 185-188页

作者：沈之荃张富尧张一烽 Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027

pervaporation separation of water-acetic acid mixtures through Poly(AN-co-AA) membranes and rare earth metal ions treated Poly(AN-co-AA)membranes was investigated for the first time. The results showed that the treatment with rare earth metal ions could greatly improve the characteristics of the separation of water-acetic acid mixtures.

关键词： pervaporation separation WATER-ACETIC MIXTURE POLY (AN-CO-AA) MEMBRANES RARE EARTH IONS

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Studies on pervaporation separation of Ethanol/Water Mixtures with Membranes of Polypropylene Sulfonate Salts

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Chemical Research in Chinese Universities 1990年第4期6卷 386-390页

作者： Lin Shaokun, Xu Yingbin and Lin Shangan (Institute of Polymer Science, Zhongshan University, Guangzhou, 510275)

Sulfonated polypropylene membranes loaded with different kinds of counter-ions were prepared by heterogeneous chiorosulfonation reaction of polypropylene membrane followed by hydrolysis and ion-exchange reaction. The membranes obtained were used for selective separation of ethanol/water mixtures by pervaporation. The effects of counter-ion species, ion-exchange capacity, solution composition, thickness of membrane and temperature on the separation behavior of the membranes were investigated. Microstructure and morphology of the membranes were examined by X-ray and SEM as well.

关键词： pervaporation separation Membranes Polypropylene sulfonate

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ORGANIC PERMSELECTIVE pervaporation CHARACTERISTICS OF POLY(SILYLPROPYNE) AND COPOLYMER DENSE MEMBRANES

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Chinese Journal of Polymer Science 1997年第2期15卷 162-171页

作者：王信玮施艳荞陈观文 Institute of Chemistry Academia Sinica Beijing 100080

An investigation into the organic permselective separation through poly [1-trimethylsilyl-1-propyne] (PTMSP) and (1-trimethylsily 1)-1-(1-penta-methyl-disily 1)-1-propyne copolymer (TMSP-PMDSP) dense membranes was made to gain an insight into the effect of the chemical structure of membrane materials on pervaporation (PV) characteristics. The results show that the copolymer has a higher separation factor alpha(org/water) but with a relatively lower value of flux J(t) (g/m(2).h) than pure PTMSP. This phenomenon may be attributed to the introduction of side chain with large bulk volume in copolymer, which brought about a decrease of excess free volume and the improvement of diffusion selectivity to some extent. With the same molar concentration of organic liquids in feed, THF/water solutions have the highest value of alpha(org/water) as well as J(t) in comparison with ethanol/water, iso-propanol/water and THF/water mixtures.

关键词： pervaporation separation poly[1-trimethylsilyl-1-propyne] dense membrane organic permselectivity

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