Measurement of vapor-liquid equilibria (VLE) and excess enthalpies (HF) of binary systems with 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and prediction of these properties and γ∞ using modified UNIFAC (Dortmund)

Vapor-liquid equilibria (VLE) and excess enthalpies (H-E) were measured for a variety of alkanes, alkenes, aromatics, alcohols, ketones and water in several ionic liquids, 1-ethyl- 3 -methylimidazolium bis(trifluoromethylsulfonyl)imide [EMIM](+)[BTI](-), 1-butyl-3-methyl-imidazolium 14 bis(trifluoromethylsulfonyl)imide [BMIM](+)[BTI](-), 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [HMIM](+)[BTI](-) and Ioctyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [MIM](+)[BT](-), covering the temperature range from 323.15 to 413.15 K. The new data were used together with the already available experimental data for imidazolium compounds to fit the required group interaction parameters for modified UNIFAC (Dortmund). The results show that in the future modified UNIFAC (Dortmund) can be applied successfully also for systems with ionic liquids. (c) 2007 Elsevier B.V. All rights reserved.