Journal of Chemical and Engineering Data, Vol.59, No.3, 672-677, 2014
Solubilities and Thermodynamic Study of Carbon Tetrachloride in Imidazolium Ionic Liquids at Different Temperatures
Solubilities of carbon tetrachloride in four imidazolium ionic liquids including 1-butyl-3-methyl imidazolium bis(trifluoromethyl sulfonyl) imide ([Bmim] [NTf2]), 1-butyl-3-methyl imidazolium dicyanamide ([Bmim][N(CN)(2)]), 1-butyl-3-methyl imidazolium hexafluorophosphate ([Bmim][PF6]), ([Bmim][BF4]) have been experimentally determined using the double- and 1-butyl-3-methyl imidazolium tetrafluoroborate liquid isothermal equilibrium method in the from phase temperature range proposed to correlate the solubility data with temperatures. The dissolving (298.15 to 318.15) K and at ambient pressure. An empirical equation was been evaluated based on the solubility results. Through the calculation and thermodynamic function variations involving Delta G(s)(theta), Delta H-s(theta), and Delta S-s(theta) have analysis for polarity, steric hindrance, and interaction energy of CCl4 with the anions, the sequence of dissolving ability of the ionic liquids for CCl4 was discussed, and a dissolution mechanism as well as dissolution driving force have been suggested. The results show that at a certain temperature the dissolving ability of the ionic liquids for CCl4 changes in the order x([Bmim][NTf2]) > x([Bmim][BF4]) > x([Bmim][PF6]), and the dissolving ability of each ionic liquid goes up with an increase in temperature. The dissolution of CCl4 in the ionic liquids is an endothermic, enthalpy-driven process.