(Liquid + liquid) equilibrium at T = 298.15 K for ternary mixtures of alkane + aromatic compounds + imidazolium-based ionic liquids

•The LLE ternary phase diagrams with 2 imidazolium-based ionic liquids were measured.•The LLE data were experimental determined at T=298.15K and p=1atm.•Mixtures of (octane or nonane) and (benzene or toluene or ethylbenzene) were studied.•LLE experimental data were correlated with NRTL and UNIQUAC thermodynamic models.