应用化学 ›› 2017, Vol. 34 ›› Issue (7): 824-832.DOI: 10.11944/j.issn.1000-0518.2017.07.160423

• 研究论文 • 上一篇    下一篇

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

田洛阳ab,陈亚丽c,王强ab*()   

  1. a新疆大学理化测试中心 乌鲁木齐 830046
    b新疆大学化学化工学院 煤化工重点实验室 乌鲁木齐 830046
    c中国科学院新疆生态与地理研究所 乌鲁木齐 830046
  • 接受日期:2017-01-23 出版日期:2017-07-04 发布日期:2017-07-04
  • 通讯作者: 王强
  • 基金资助:
    国家自然科学基金(21366029,21566036)资助项目

Determination of Thermodynamic Parameters of Organic Solvents in Ionic Liquid 1-Butyl-3-methylimidazolium Hexafluorophosphate by Inverse Gas Chromatography

TIAN Luoyangab,CHEN Yalic,WANG Qiangab*()   

  1. aCenter for Physical and Chemical Analysis,Xinjiang University,Urumqi 830046,China
    bKey Laboratory of Coal Cleaning Conversion and Chemical Engineering Process,Xinjiang Uyghur Autonomous Region,College of Chemistry and Chemical Engineering,Xinjiang University,Urumqi 830046,China
    cService Center of Public Technology Xinjiang Institute of Ecology and Geography CAS,Urumqi 830046,China
  • Accepted:2017-01-23 Published:2017-07-04 Online:2017-07-04
  • Contact: WANG Qiang
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21366029, No.21566036)

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