论文部分内容阅读
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]PF_6)中的热力学参数。在测试温度范围内计算了有机溶剂与[BMIM]PF_6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]PF_6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]PF_6的良溶剂。
The thermodynamic parameters of 18 organic solvents in ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM] PF_6) were tested by inverse gas chromatography (IGC) over the temperature range of 343.15-373.15 K . The thermodynamic parameters such as molar enthalpy of adsorption, mass fraction activity, Flory-Huggins interaction parameter, partial molar enthalpy of mixing and infinite dilution activity coefficient between organic solvent and [BMIM] PF_6 were calculated in the range of test temperature. The results show that n-paraffins, cyclohexane, tetrahydrofuran, diethyl ether and carbon tetrachloride are the poor solvents for [BMIM] PF_6 in the selected organic solvents. In contrast, benzene, toluene, m-xylene, methylene chloride, acetone, chloroform, ethyl acetate, methyl acetate, ethanol and methanol are good solvents for [BMIM] PF_6.