Isothermal Vapor + Liquid Equilibrium and Thermophysical Properties for 1-Butyl-3-methylimidazolium Bromide + 1-Butanol Binary System

Abstract

Experimental isothermal vapor + liquid equilibrium (VLE) data are reported for the binary mixture containing 1-butyl-3-methylimidazolium bromide ([bmim]­Br) + 1-butanol at three temperatures, 353.15, 363.15, and 373.15 K, in the range of 0–0.321 liquid mole fraction of [bmim]­Br. Additionally, refractive index measurements have been performed at two temperatures, 298.15 and 308.15 K in the whole composition range. Densities, excess molar volumes, surface tensions, and surface tension deviations of the binary mixture were predicted by Lorenz–Lorentz (n D–ρ) mixing rule. Dielectric permittivities and their deviations were evaluated by known equations. Vapor + liquid equilibrium data were correlated with the Wilson thermodynamic model while refractive index data were correlated by the 3-parameters Redlich–Kister equation. The studied mixture presents positive abatement from Raoult’s law. Similarly, positive refractive index deviations are obtained. The VLE data may be used in separation processes design, and the thermophysical properties may be used as key parameters in specific applications.

Speed of Sound and Ultrasound Absorption in Ionic Liquids

“…The database included papers in which experimental speed of sound data were reported for temperatures from 278.15 to 393.15 K and pressures from 0.1 to 200 MPa (142 articles), a paper in which experimental data are presented only as a plot (1 article), and works where only calculated values of speed of sound are available (22 articles) published in the period 2004–2014 (Table S1). ,,− ,− ,− ,,,,,− …”

Solution molar enthalpies for 1-butyl-3-methylimidazolium chloride – 1-propanol system at 303.56 and 318.68 K

“…9 ) and enthalpies of solution at infinite dilution for the selected IL + 1-propanol system presented in this paper represent a continuation of our study on thermodynamic and thermophysical properties on prototype ILs with organic solvents (alcohols, water) systems. [10][11][12][13][14][15] In the available literature 8,16 for the [bmim]Cl + 1-propanol system no data on solution and excess molar enthalpies have been found. These data together with above mentioned measured properties for this system offer a better understanding of the nature of the interactions between the IL cations and anions and the other compound which is 1-propanol.…”