Phase Equilibria of Gases and Liquids with 1-n-butyl-3-Methylimidazolium Tetrafluoroborate

摘要

The solubility of carbon dioxide, methane, nitrogen, carbon monoxide and benzene in 1-n-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF_4]) at 25°C are reported. In addition, we present densities, which compare very favorably with one set of literature values, for [bmim][BF_4]. Accurate values of density are needed in the analysis of gas solubility data. Finally, we report liquid-liquid equilibrium data for [bmim][BF_4] with 1-propanol and benzene. Information on vapor-liquid and liquid-liquid equilibrium of gases and liquids with ionic liquids is important for evaluating the use of ionic liquids in a wide variety of processes, including reactions and separations.