Experimental Determination and Correlation of Liquid-Liquid Equilibria Data for a System of Water + Ethanol + 1-Butyl-3-methylimidazolium Hexafluorophosphate at Different Temperatures Cháfer, A.; de la Torre, J.; Montón, J.B.; Lladosa, E.; Journal of Chemical & Engineering Data 2017, 62, 773-779