Liquid-liquid equilibria of the ternary systems dodecane plus butylbenzeneplus sulfolane, dodecane plus 1,4-diisopropylbenzene plus sulfolane, and dodecane plus octylbenzene plus sulfolane

Liquid-liquid equilibria of the ternary systems dodecane + butylbenzene + s ulfolane, dodecane + 1,4-diisopropylbenzene + sulfolane, and dodecane + oct ylbenzene + 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-kn own NRTL and UNIQUAC models. The experimental data were filled in the UNIQU AC equation better than in the NRTL equation; the average root-mean-square deviations phase composition error was 0.3215 for UNIQUAC compared to 0.452 0 for NRTL.