Physical and Excess Properties for Binary Mixtures of 1-Methyl-3-Octylimidazolium Tetrafluoroborate, [Omim][BF4], Ionic Liquid with Different Alcohols

Part I: Thermodynamic analysis of volumetric properties of concentrated aqueous solutions of 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-2,3-dimethylimidazolium tetrafluoroborate, and ethylammonium nitrate based on pseudo-lattice theory

“…In addition, the determination of partial molar extents, even in the central part of the curve, inevitably depends on the quality of the description of the experimental curve: using a derivation technique, it is not possible to be certain that the values of the partial molar extents are suitable. This technique was used to analyse the experimental data for several (water + ionic liquid) mixtures [18,19]. The ''pseudo-lattice'' theory developed by Bahe and Varela et al appeared to us to be potentially useful.…”

On the Origin of Excess Thermodynamic Quantities in Liquid Mixtures

“…2b) and refractive index behave linear with CCl 4 volume fraction. The pure components have similar molar volumes (96.5 cm 3 /mole for CCl 4 and 80.0 cm 3 /mole for CHCl 3 ) and densities (1.59 g/cm 3 for CCl 4 and 1.49 g/cm 3 for CHCl 3 ) and the two molecules are similar, differing just for the substitution of a chlorine atom with an hydrogen. In addition, we do not expect that the weak dipole of CHCl 3 molecule is able to drive local configurations stable on the time scale of a Brillouin scattering experiment (~10 -9 s).…”

“…The investigation of the excess thermodynamic properties in liquid mixtures is a commonly adopted approach to infer information about the nature of the inter-specie interaction [1][2][3][4][5][6][7][8][9][10][11]. In particular, the concentration dependence of the compressibility of a binary mixture is a quantity whose deviations from ideality are assumed able to give direct indications about the attractive or repulsive nature of the inter-specie potential.…”

Heat capacities of the mixtures of ionic liquids with methanol at temperatures from 283.15K to 323.15K

“…BF À 4 ; PF À 6 ; and ½CF 3 ðSO 2 Þ 2 N À ) have been the most often investigated and described group of low-temperature ionic liquids with a very wide potential application in new technologies. The mixtures of 1-alkyl-3-methylimidazolium tetrafluoroborates with alcohols have been intensively studied for several years [3][4][5][6][7][8][9][10][11][12]. Much attention in these studies has been focused on the phase equilibria occurring in these mixtures [3][4][5][6][7][8], which is of paramount importance in using ionic liquids in separation processes.…”