Abstract
Liquid–liquid equilibria (LLE) were determined for ternary systems {methyl tert-butyl ether (MTBE)+methanol+1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4])}, {MTBE+ethanol+[Bmim][BF4]}, {MTBE+methanol+1-ethyl-3-methylimidazolium ethylsulfate (EMISE)} and {MTBE+ethanol+EMISE} at 298.15K and atmospheric pressure. The experimental apparatus used a jacketed glass equilibrium cell. The experimental data were correlated with the well-known nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) activity coefficient models. In addition, the distribution coefficients and the selectivity of the imidazolium-based ionic liquids to methanol and ethanol in the MTBE phase were determined.
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