Activity Coefficients at Infinite Dilution and Physicochemical Properties for Organic Solutes and Water in the Ionic Liquid 1-Ethyl-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate

Abstract

New data of activity coefficients at infinite dilution, γ13∞, for 65 different solutes including alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, aldehydes, esters and water in the ionic liquid 1-ethyl-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate, were determined using inverse gas chromatography within the temperature range from 318.15 to 368.15 K. This is a continuation of our study of ionic liquids based on this anion. The results are compared with the other trifluorotris(perfluoroethyl)phosphate ionic liquids. The γ13∞ values were used to calculate thermodynamic functions such as partial molar excess Gibbs energies , enthalpies and entropies as well as gas–liquid partition coefficients of the solutes, KL. These values were used to determine the linear free energy relationship (LFER) system constants as a function of temperature. The selectivities at infinite dilution needed for some extraction problems were calculated and compared with literature data of ionic liquids based on the trifluorotris(perfluoroethyl)phosphate anion and the 1-ethyl-3-methylimidazolium cation. Additionally, the density and viscosity of the investigated ionic liquid at temperatures from 298.15 to 348.15 K were measured.Electronic supplementary materialThe online version of this article (doi:10.1007/s10953-014-0274-0) contains supplementary material, which is available to authorized users.

Measurements of Activity Coefficients at Infinite Dilution for Organic Solutes in the Ionic Liquids N-Ethyl- and N-Octyl-N-methylmorpholinium Bis(trifluoromethanesulfonyl)imide. A Useful Tool for Solvent Selection

“…One such parameter is the value of the activity coefficient at infinite dilution: γ ∞ 13 . In the last years, intensive research has been conducted to determine the values of γ ∞ 13 , which are a perfect source of information in the characterization of volatile organic compound-IL interactions [11][12][13][14]. The analysis of the obtained results may allow for direct choice of the best ionic liquid or may serve as a basis for creating theoretical models in order to predict crucial parameters, e.g., partial molar excess thermodynamic functions [15,16].…”

Temperature-Dependent Linear Solvation Energy Relationship for the Determination of Gas-Liquid Partition Coefficients of Organic Compounds in Ionic Liquids

“…1-(2-hydroxyethyl)-3-methylimidazolium tris (pentafluoroethyl)trifluorophosphate [30] [EMIM] + [FAP] À 1-ethyl-3-methylimidazolium tris(pentafluoroethyl) trifluorophosphate [31] [BMIM] + [N(CN) 3 ] À 1-butyl-3-methylimidazolium tricyanomethanide [32] [EMIM] + [BF 4 ] À 1-ethyl-3-methylimidazolium tetrafluoroborate [33] […”

Measurement of Activity Coefficients at Infinite Dilution for Alcohols in [BMIM][CH3SO4] using HS-SPME/GC-FID

“…Selective solvents have an important role in the separation of solutions, with the potential of allowing separation of azeotropes (Elias et al, 2014;Krummen et al, 2002), which occur in large numbers in diverse industrial processes (Wlazło et al, 2014). Therefore, the solvent choice is one of the most important steps in the separation processes.…”

“…This coefficient is also useful in calculating selectivity, which is the ratio between two activity coefficients of solutes at infinite dilution in the same solvent and ata fixed temperature. The selectivity ratio is useful for determining the best solvent for extracting the component of interest from a mixture (Krummen et al, 2000A;Krummen et al, 2002;Dobryakov and Maurer, 2008), including specific azeotropic mixtures (Wlazło et al, 2014).…”