Vapor-liquid equilibrium data for the ternary system di-isopropyl ether (DIPE) + 2-propanol + benzene and the binary system 2-propanol + benzene at T = 313.15 K are reported. An isothermal total pressure cell has been used for the measurements. Experimental data have been correlated by Barker's method using the Margules equation for the binary system and the Wohl expansion for the ternary system. The Wilson, nonrandom two-liquid (NRTL), and universal quasichemical activity coefficient (UNIQUAC) models have also been applied for the calculations. A comparative study of the effect of the alcohol in mixtures containing DIPE or benzene is included, using the data previously published by the group.