Activity Coefficients at Infinite Dilution of Alkanes, Alkenes, and Alkyl Benzenes in 1-Butyl-3-methylimidazolium Trifluoromethanesulfonate Using Gas−Liquid Chromatography

Abstract

Activity coefficients at infinite dilution γ i ∞ have been measured for 17 organic solutessalkanes, alkenes, and alkyl benzenessin the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM][CF 3 SO 3 ]) by the gas-liquid chromatographic method with the ionic liquid as the stationary phase. The measurements were carried out from (303.15 to 363.15) K. The partial molar excess enthalpies at infinite dilution H i E,∞ of the solutes in the ionic liquid were also derived from the temperature dependence of the γ i ∞ values.

Activity Coefficients at Infinite Dilution of Organic Solutes in 1-Ethyl-3-methylimidazolium Tetrafluoroborate Using Gas−Liquid Chromatography

“…All chemicals were used without further purification. 3 ]. Impurity peaks were not observed in the 1 H NMR.…”

“…[1][2][3][4][5][6][7] Heintz et al [8][9][10][11][12][13][14][15][16] and Letcher et al [17][18][19][20][21][22][23][24][25] measured γ i ∞ of various solutes in a number of ILs.…”

Imidazolium Based Ionic Liquids: Unbiased Recovering of Vaporization Enthalpies from Infinite-Dilution Activity Coefficients

“… a The definition of symbols is the same as in Table 1 . b Combination of data set of n -alkanes [ 58 ] with the data set for alcohols [ 59 ]. c Estimated from data set containing values only for alkylbenzenes and low polar solutes.…”

Solvation parameter model and thermodynamic parameters in a dicationic ionic liquid based on pyrrolidinium

“…We found Tables 7-9 list selectivity values for the alkane/alcohol, alkane/ polar compound and aliphatic/aromatic compound separation. Table 10 summarizes the selectivity values for hexane/benzene, hexane/methanol and hexane/2-pentanone separation at T = 323 K. These values were compared with similar values in the literature [1,3,16,20,[37][38][39][40][41][42]. Selectivity values in [C 9 (2MNPTpy) 2 ][(NTf 2 ) 2 ] for separation of the alkanes and polar compounds were found to be greater than those of alkane and alcohol.…”