In this work, the ionic liquid tributylmethylammonium bis(trifluoromethylsulfonyl)imide, [N-4441][NTf2], has been evaluated as potential extraction solvent for the separation of benzene from its mixtures with octane and decane. The liquid liquid equilibrium (LLE) data for the ternary systems (octane (1) + benzene (2) + [N-4441][NTf2] (3)) and (decane (1) + benzene (2) + [N-4441][NTf2] (3)) and for the quaternary system {octane (1) + decane (2) + benzene (3) + [N-4441][NTf2] (4)} were determined at T= 298.15 K and atmospheric pressure. Solute distribution ratios and selectivities were calculated from the experimental LLE data and analyzed in order to evaluate the suitability of the ionic liquid in the studied separation. Finally, experimental results for the ternary and quaternary systems were correlated with the Non-Random Two-Liquid (NRTL) thermodynamic model. (C) 2016 Elsevier B.V. All rights reserved.