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

doi:10.11944/j.issn.1000-0518.2017.07.160423

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (7): 824-832.DOI: 10.11944/j.issn.1000-0518.2017.07.160423

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

TIAN Luoyang^a^b,CHEN Yali^c,WANG Qiang^a^b^*()

^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)

Abstract

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

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

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