Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (04): 678-682.doi: 10.3866/PKU.WHXB201301314

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles     Next Articles

Phase Behaviors of 1-Butyl-3-methylimidazolium Hexafluorophosphate+Water+Alcohol Systems

NING Hui, HOU Min-Qiang, MEI Qing-Qing, YANG De-Zhong, HAN Bu-Xing   

  1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2012-12-11 Revised:2013-01-28 Published:2013-03-25
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20903109, 21073207).

Abstract:

The phase behaviors of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF6]) + water+methanol, [bmim][PF6]+water+ethanol, [bmim][PF6]+water+2-propanol, and [bmim][PF6]+water+1- propanol ternary systems were determined at 298.15 K and ambient pressure. It was demonstrated that when the mole fractions of the alcohols in the water+alcohol solutions were 0.55-1.00, 0.40-0.75, and 0.35-0.50 for methanol, ethanol, and 2-propanol, respectively, the [bmim][PF6] was totally dissolved in the aqueous alcohol solutions due to a strong co-solvent effect. However, water+1-propanol did not exhibit this kind of behavior. Both the size and structure of the alcohols significantly affected the phase behaviors of the ternary systems.

Key words: Ionic liquid, Water, Alcohol, Phase behavior, Co-solvent effect

MSC2000: 

  • O642