Liquid−Liquid Equilibria of the Ternary Systems Dodecane + Butylbenzene + Sulfolane, Dodecane + 1,4-Diisopropylbenzene + Sulfolane, and Dodecane + Octylbenzene + Sulfolane

Liquid−liquid equilibria of the ternary systems dodecane + butylbenzene + sulfolane, dodecane + 1,4-diisopropylbenzene + sulfolane, and dodecane + octylbenzene + sulfolane have been determined at the temperatures of 323.15 K, 348.15 K, and 373.15 K. The tie line data were correlated with the well-known NRTL and UNIQUAC models. The experimental data were filled in the UNIQUAC equation better than in the NRTL equation; the average root-mean-square deviations phase composition error was 0.3215 for UNIQUAC compared to 0.4520 for NRTL.