Measurement and correlation of high pressure densities of ionic liquids, 1-ethyl-3-methylimidazolium L -lactate ([emim][Lactate]), 2-hydroxyethyl- trimethylammonium L -lactate ([(C2H4OH)(CH 3)3N][Lactate]), and 1-butyl-3-methylimidazolium chloride ([bmim][Cl])

Hiroshi Machida, Ryosuke Taguchi, Yoshiyuki Sato, Richard Lee Jr. Smith

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Pressure-density-temperature (pρT) data for three types of ionic liquid, [emim][lactate], [(C2H4OH)(CH3) 3N][lactate], and [bmim][Cl], were measured with a bellows type dilatometer at temperatures up to 452 K and at pressures up to 200 MPa. The Tait equation could correlate the density data as a function of temperature and pressure to within an average relative deviation (ARD) of 0.014 %. The thermal expansion coefficients and the isothermal compressibilities were estimated with the Tait equation, and their variations with temperature and pressure, dαp/dT and dkT/dp, were found to be negative. Lattice type equations of state were applied to correlate the data. The densities could be correlated to within an ARD of 0.21 % and 0.067 %, for the Sanchez-Lacombe equation of state and the ε-modified Sanchez-Lacombe equation of state, respectively. The equation-of-state parameters determined should be useful in estimating the properties of mixtures and in estimating the phase equilibria of binary and multicomponent systems.

Original languageEnglish
Pages (from-to)923-928
Number of pages6
JournalJournal of Chemical and Engineering Data
Volume56
Issue number4
DOIs
Publication statusPublished - 2011 Apr 14

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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