反气相色谱法测定有机溶剂在离子液体1-丁基-3-甲基咪唑六氟磷酸盐中的热力学参数

doi:10.11944/j.issn.1000-0518.2017.07.160423

摘要/Abstract

摘要：

在343.15~373.15 K温度范围内,采用反气相色谱法(IGC)测试了18种有机溶剂在离子液体1-丁基-3-甲基咪唑六氟磷酸盐([BMIM]PF₆)中的热力学参数。在测试温度范围内计算了有机溶剂与[BMIM]PF₆之间的摩尔吸收焓、质量分数活度系数、Flory-Huggins相互作用参数、偏摩尔混合焓和无限稀释活度系数等热力学参数。结果表明,所选的有机溶剂中,正构烷烃、环己烷、四氢呋喃、乙醚和四氯化碳为[BMIM]PF₆的不良溶剂。相比之下,苯、甲苯、间二甲苯、二氯甲烷、丙酮、氯仿、乙酸乙酯、乙酸甲酯、乙醇和甲醇是[BMIM]PF₆的良溶剂。

关键词: 反气相色谱法, 离子液体, Flory-Huggins相互作用参数, 无限稀释活度系数

Abstract:

Thermodynamic parameters of eighteen kinds of organic solvents in ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate([BMIM]PF₆) were determined by inverse gas chromatography(IGC) from 343.15 to 373.15 K. The molar enthalpy of sorption, mass fraction activity coefficient, Flory-Huggins interaction parameter, partial molar enthalpy of mixing, and activity coefficient at infinite dilution, were calculated to determine the interactions between [BMIM]PF₆ and selected solvents at the indicated temperature range. n-Alkanes, cyclohexane, tetrahydrofuran, ether, and carbon tetrachloride were found to be poor solvents for [BMIM]PF₆, while benzene, toluene, m-xylene, dichloromethane, acetone, chloroform, ethyl acetate, methyl acetate, ethanol, and carbinol were favorable solvents for this ionic liquid.

Key words: inverse gas chromatography, ionic liquid, Flory-Huggins interaction parameter, activity coefficient at infinite dilution

田洛阳, 陈亚丽, 王强. 反气相色谱法测定有机溶剂在离子液体1-丁基-3-甲基咪唑六氟磷酸盐中的热力学参数[J]. 应用化学, 2017, 34(7): 824-832.

TIAN Luoyang, CHEN Yali, WANG Qiang. Determination of Thermodynamic Parameters of Organic Solvents in Ionic Liquid 1-Butyl-3-methylimidazolium Hexafluorophosphate by Inverse Gas Chromatography[J]. Chinese Journal of Applied Chemistry, 2017, 34(7): 824-832.

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