Activity coefficients at infinite dilution for solutes in the trioctylmethylammonium bis(trifluoromethylsulfonyl)imide ionic liquid using gas-liquid chromatography

作者：Gwala Nobuhle V; Deenadayalu Nirmala^*; Tumba Kaniki; Ramjugernath Deresh

来源：Journal of Chemical Thermodynamics, 2010, 42(2): 256-261.

DOI：10.1016/j.jct.2009.08.012

• Activity coefficients at infinite dilution
• Selectivity
• Ionic liquid
• Gas-liquid chromatography

The activity coefficient at infinite dilution (gamma(infinity)(13)) for 30 solutes: alkanes, alkenes, cycloalkanes, alkynes, ketones, alcohols, and aromatic compounds was determined from gas-liquid chromatography (glc) measurements at three temperatures (303.15, 313.15, and 323.15) K. The ionic liquid: trioctylmethylammonium bis(trifluoromethylsulfonyl)imide, was used as the stationary phase. For each temperature, gamma(infinity)(13) values were determined using two columns with different mass percent packing of the ionic liquid. The selectivity (S(12)(infinity)) value was calculated from the gamma(infinity)(13) to determine the suitability of the solvent as a potential entrainer for extractive distillation in the separation of an hexane/benzene mixture, indicative of a typical industrial separation problem for benchmarking purposes.

• 出版日期2010-2