Evaluation of the ionic liquids 1-alkyl-3-methylimidazolium hexafluorophosphate as a solvent for the extraction of benzene from cyclohexane: (Liquid + liquid) equilibria

► Measured ternary LLE for {cyclohexane (1) + benzene (2) + [Cnmim][PF6] (3)}. ► Well correlated the LLE data with the NRTL model. ► Determined the benzene distribution coefficient and solvent selectivity. ► Very promising for the extraction of benzene from cyclohexane. ► Very helpful for overcoming drawbacks of the conventional separation process.