Isobaric vapor-liquid equilibrium data for the isopropanol-water-1-octyl-3-methylimidazolium tetrafluoroborate system

LI QunSheng;HUANG XiaoQiao;ZHANG JiGuo;HE XiuQiong

Journal of Beijing University of Chemical Technology ›› 2010, Vol. 37 ›› Issue (3) : 1-5.

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Journal of Beijing University of Chemical Technology ›› 2010, Vol. 37 ›› Issue (3) : 1-5.
化学与化学工程

Isobaric vapor-liquid equilibrium data for the isopropanol-water-1-octyl-3-methylimidazolium tetrafluoroborate system

  • LI QunSheng;HUANG XiaoQiao;ZHANG JiGuo;HE XiuQiong
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Abstract

Isobaric vapor-liquid equilibrium (VLE) data for the isopropanol-water system
containing the ionic liquid (IL) 1-octyl-3-methylimidazolium tetrafluoroborat
e ([OMIM]BF4) have been measured at 101.32kPa in a modified Othmer still.
The vapor-liquid equilibrium curve for the isopropanol water-system with added IL deviates from the line when the mole fraction of [OMIM]BF4 reaches 10%.
When the mole fraction of [OMIM]BF4 reaches 20% or 30%, the deviation from the line increases further. The IL shows a salt effect, which increases the volatility of isopropanol relative to that of water, and even leads to the disappearance of the azeotropic point. As a result, it is concluded that [OMIM]BF4 can be employed as an entrainer for the extractive distillation of the isopropanol-water system. Based on the VLE data, the optimum mole fraction of [OMIM]BF4 is about 20%. The measured ternary data were correlated using the NRTL model, and the correlated result was found to be similar to the experiment data.

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LI QunSheng;HUANG XiaoQiao;ZHANG JiGuo;HE XiuQiong. Isobaric vapor-liquid equilibrium data for the isopropanol-water-1-octyl-3-methylimidazolium tetrafluoroborate system[J]. Journal of Beijing University of Chemical Technology, 2010, 37(3): 1-5

References

[1]崔小明. 异丙醇的生产应用及市场分析[J]. 四川化工与腐蚀控制,2002,5(3): 32-37. Cui X M. Isopropyl alcohol production application and market analysis[J]. Sichuan Chemical and Corrosion Control, 2002, 5(3): 32-37. (in Chinese)
[2]赵鹏,许春建, 周明, 等. 吸附蒸馏分离异丙醇-水的试验研究[J]. 化学工业与工程,2003,20(6):342-346.Zhao P, Xu C J, Zhou M, et al. Experimental study on the separation of isopropanol and water by adsorptive distillation[J]. Chemical Industry and Engineering,2003, 20(6): 342-346. (in Chinese)
[3]雷志刚, 周荣琪, 叶坚强, 等. 加盐反应萃取精镏分离醇水溶液[J]. 化学工业与工程, 2001,18(5):290-294.
Lei Z G, Zhou R Q, Ye J Q, et al. Separation on the aqueous alcohol solution by
extractive distillation with salt[J]. Chemical Industry and Engineering, 2001,
18(5): 290-294. (in Chinese)
[4]孙学文,赵锁奇,王仁安. 离子液体在石油化工中的应用[J]. 石油化工, 2002, 31(10): 855-860.
Sun X W, Zhao S Q, Wang R A. The application of ionic liquid in petroleum chemical industry[J]. Petrochemical Technology, 2002, 31(10): 855-860. (in Chinese)
[5]史奇冰,郑逢春,李春喜, 等. 用NRTL方程计算含离子液体体系的汽液平衡[J]. 化工学报, 2005,56(5): 751-755.
Shi Q B, Zheng F C, Li C X, et al. Calculation of vaporliquid equilibrium for
ionic liquidcontaining systems with NRTL equation computation[J]. Journal of
Chemical Industry and Engineering (China), 2005, 56(5): 751-755. (in Chinese)
[6]李群生, 邢凤英, 雷志刚. 异丙醇-水-1-乙基-3-甲基四氟硼酸咪唑盐物系等压汽液平衡数据的测定[J]. 石油化工,2008,37(1): 69-73.
Li Q S, Xing F Y, Lei Z G. Isobaric vapor-liquid equilibrium for isopropanol-water-1-ethyl-3-methylimidazolium tetrafluoroborate[J]. Petrochemical Technology, 2008, 37(1): 69-73. (in Chinese)
[7]OrchillesA V, Miguel P J, Vercher E, et al. Ionic liquids as entrainers in extractive distillation: isobaric vaporliquid equilibria for acetone+methanol+ethyl-3-methylimidazo-lium
ttifluorome thanesulfonate[J]. J Chem Eng Data, 2007, 52(1): 141-147. 
[8]Vasiltsova T V, Verevkin S P, Bich E, et al. Thermodynamic properties
of mixtures containing ionic liquids. Activity Coefficients of Ethers and Alcohols in 1-Methyl-3-Ethyl-Imidazolium Bis(Trifluoromethyl-Sulfonyl) Imide Using the Transpiration Method[J]. J Chem Eng Data, 2005, 50(1): 142-148.
[9]Zhang L Z, Han J Z, Wang R J, et al. Isobaric vapor-liquid equilibria for three temary systems: water+2-propanol+1-ethyl-3-methylimidazolium tetrafluoroborate, and water+1-propanol+1-butyl-3-methylimidazolium tetrafluoroborate[J]. J Chem Eng Data, 2007, 52(4): 1401-1407.
[10]Tan T C, Tan R, Soon L H, et al. Prediction and experimental verification of the effect of salt on the vapor-liquid equilibrium of ethanol/water/1-propanol mixture[J]. Fluid Phase Equilibria, 2005, 234(1/2): 84-93.
[11]Tan T C, Chai C M, Tok A T, et al. Prediction and experimental verification of the salt effect on the vapor-liquid equilibrium of water-ethanol-2-propanol mixture[J]. Fluid Phase Equilibria, 2004, 218(1): 113-121.
[12]Gironi F, Lamberti L. Vapor-liquid equilibrium date for the water-2-propanol system in the presence of dissolved salts[J]. Fluid Phase Equilibria, 1995, 105(2): 273-286.
[13]鲍静, 张雅明, 金鑫. 异丙醇-水含盐复合物系汽液平衡[J]. 高校化学工程学报, 2005, 19(2): 258-262.
Bao J, Zhang Y M, Jin X. Vapor-liquid equilibrium for the isopropanol-water-mixed solvent containing salt systems[J]. Journal of Chemical Engineering of Chinese Universities, 2005, 19(2): 258-262. (in Chinese)
[14]曾妮, 张颂红, 姚克俭. 异丙醇-水-碱/乙二醇物系常压汽液平衡数据的测定[J]. 石油化工, 2006, 35(5): 448-451.
Zeng N, Zhang S H, Yao K J. Vapor-liquid equilibrium for isopropanol-water-alkali/glycol system at atmospheric pressure[J]. Petrochemical Technology, 2006,35(5): 448-451. (in Chinese)
[15]朱久娟,张继国,李群生, 等. 乙酸乙酯-乙醇-离子液体等压汽液平衡数据的测定[J]. 北京化工大学学报:自然科学版, 2009, 36(3): 15-19.
Zhu J J, Zhang J G, Li Q S, et al. Isobaric vapor-liquid equilibria for ethyl acetate-ethanol-ionic liquid ternary systems[J]. Journal of Beijing University of Chemical Technology: Natural Science, 2009, 36(3): 15-19. (in Chinese)
[16]Gmehling J, Onken U. Vapor-liquid equilibrium data collection[M].
Frankfurt: DECHEMA, 1977: 154.

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