Measurement and Correlation of High-Pressure Densities and Atmospheric Viscosities of Ionic Liquids: 1-Butyl-1-methylpyrrolidiniunn Bis(trifluoromethylsulfonyl)imide), 1-Allyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, 1-Ethyl-3-methylimidazolium Tetracyanoborate, and 1-Hexyl-3-methylimidazolium Tetracyanoborate

作者：Hiraga Yuya; Hagiwara Saki; Sato Yoshiyuki; Smith Richard L Jr^*

来源：Journal of Chemical and Engineering Data, 2018, 63(4): 972-980.

DOI：10.1021/acs.jced.7b00773

Four ionic liquids, [bmpyr][Tf2N] (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide), [amim][Tf2N] (1-allyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide), [emim][TCB] (1-ethyl-3-methylimidazolium tetracyanoborate), and [hmim][TCB] (1-hexyl-3-methylimidazolium tetracyanoborate), were studied. High-pressure densities were measured at pressures up to 200 MPa and at temperatures of 312-433 K. Densities and viscosities at atmospheric pressure were measured over a temperature range of 293 to 373 K, and average relative deviation (ARD) of correlation with Vogel-Fulcher-Tammann equation for viscosity were within 0.08%. Correlation of the density data with the Tait equation could be obtained to within 0.02% ARD. Isobaric expansivities calculated from the Tait equation were constant or decreased slightly with increasing temperature in accordance with trends commonly reported for ionic liquids. Parameters for the epsilon*-modified Sanchez-Lacombe equation of state are tabulated that allow correlation of the ionic liquid high-pressure densities to within an ARD of less than 0.08%.

• 出版日期2018-4