Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Isobaric vapor-liquid equilibrium (VLE) data for {ethanol (1) + water (2) + 1, 3-dimethylimidazolium dimethylphosphate (3)} where 3 is an ionic liquid ([MMIM]+[DMP]-) at atmospheric pressure (101.32 kPa) were measured with a modified Othmer still. The results showed that the VLE of ethanol + water in the presence of different contents of IL was obviously different from that of the IL-free system. The IL studied showed a salting-out effect, which gave rise to a change of the relative volatility of ethanol and even to the elimination of the azeotropic point. It was found that the salting-out effect followed the order of x3 = 0.15 greater than x3 = 0.10 greater than x3 = 0.05. The measured ternary data were correlated using the NRTL model.