聚二甲基硅氧烷膜分离甲醇/碳酸二甲酯混合物的渗透汽化研究

膜科学与技术 , 2009, 29(2): 7-11. doi: 10.3969/j.issn.1007-8924.2009.02.002

聚二甲基硅氧烷膜分离甲醇/碳酸二甲酯混合物的渗透汽化研究

1.清华大学化工系膜技术与工程研究中心,北京,100084

2.清华大学化工系膜技术与工程研究中心,北京,100084

3.清华大学化工系膜技术与工程研究中心,北京,100084

4.清华大学化工系膜技术与工程研究中心,北京,100084

基金项目: 国家自然科学基金(20676067;20736003) 国家高技术研究发展计划(863计划)(2007AA062317) 国家重点基础研究发展规划(973计划)(2009CB623404) 教育部高等学校博士学科点专项科研基金(20070003130)

关键词：聚二甲基硅氧烷 , 甲醇/碳酸二甲酯 , 渗透汽化

Pervaporation performances of polydimethylsiloxane membranes for separating dimethyl carbonate/methanol mixtures

制备了一系列聚二甲基硅氧烷(PDMS)均质膜,用于渗透汽化法分离甲醇/碳酸二甲酯混合物,此系列PDMS均质膜优先脱除碳酸二甲酯.考查了PDMS均质膜在甲醇和碳酸二甲酯液体中的溶胀性能,并研究了PDMS预聚体的黏度、交联剂浓度、操作温度及料液浓度对渗透汽化分离性能的影响.结果表明,对于不同黏度的PDMS预聚体均表现出随交联剂浓度增加分离因子先增加后减小,而渗透通量则逐渐减小;随操作温度增加分离因子减小而渗透通量增大;随料液中碳酸二甲酯浓度增加分离因子先增加后减小,而渗透通量则逐渐增大.对于碳酸二甲酯浓度为30%的甲醇/碳酸二甲酯混合物,40℃时渗透侧碳酸二甲酯浓度为59.7%,分离因子为3.46,渗透通量为1.41 kg/(m2·h).

参考文献

[1]	Daniele Delledonne;Franco Rivetti;Ugo Romano .Developments in the production and application of dimethylcarbonate[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2001(1/2):241-251.
[2]	Passoni G A .Purification of dimethyl carbonate[P].DE Pat,2450856,1973-10-26.
[3]	Gilpin J A;Emmons A H .Synthesis of dimethyl carbonate[P].US Pat,3803201,1971-02-22.
[4]	Spencer M S .Carbonate production[P].US Pat,4582645,1983-10-04.
[5]	Janisch I;Landscheidt H;Struver W et al.Process for separating off methanol from a mixture of dimethyl carbonate and methanol[P].US Pat,5455368,1993-12-15.
[6]	Walter H .Purification of dimethyl carbonate[P].DE Pat,2706684,1977-02-17.
[7]	Buysch H J .Separation of DMC from its azeotrope with methanol[P].DE Pat,2737265,1977-08-18.
[8]	Josef B H;Heindrich K;Hans R et al.Process for separating off dimethyl carbonate[P].DE Pat,2737265,1979-06-22.
[9]	Keigo N .Process for purifying dimethyl carbonate[P].JP Pat,270249,1991-02-26.
[10]	Romano U .Recovery of dimethyl carbonate from its azeotropic mixture with methanol[P].DE Pat,2607003,1975-02-21.
[11]	Rechner J;Klausener A;Buysch H J et al.Process forthe preparation of dialkyl carbonates[P].US Pat,5274163,1992-02-10.
[12]	Shah V;Bartels C.Engineering considerations in pervaporation applications[A].Heidelberg,Germany:Bakish Materials Corporation,1991:331-337.
[13]	Jonquieres A.;Clement R.;Lochon P.;Neel J.;Dresch M.;Chretien B. .Industrial state-of-the-art of pervaporation and vapour permeation in the western countries [Review][J].Journal of Membrane Science,2002(1/2):87-117.
[14]	Wang LY;Li JD;Lin YZ;Chen CX .Separation of dimethyl carbonate/methanol mixtures by pervaporation with poly(acrylic acid)/poly(vinyl alcohol) blend membranes[J].Journal of Membrane Science,2007(1/2):238-246.
[15]	Wang L;Li J;Lin Y et al.Cross-linked poly(vinyt alcohol) membranes for separation of dimethyl carbonate/methanol mixtures by pervaporation[J].Chemical Engineering Journal,2009,146(01):71-78.
[16]	Liu BB;Cato YM;Wang TH;Yuan Q .Preparation of novel ZSM-5 zeolite-filled chitosan membranes for pervaporation separation of dimethyl carbonate/methanol mixtures[J].Journal of Applied Polymer Science,2007(3):2117-2125.
[17]	Wooyoung Won;Xianshe Feng;Darren Lawless .Separation of dimethyl carbonate/methanol/water mixtures by pervaporation using crosslinked chitosan membranes[J].Separation and Purification Technology,2003(2):129-140.
[18]	Watson J M;Payne P A .A study of organic compound pervaporation through silicone rubber[J].Journal of Membrane Science,1990,49:171-205.

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