Abstract
Liquid—liquid equilibrium (LLE) data are presented for the systems cyclohexane-water- 1-butanol, cyclohexane-water-2-butanol, cyclohexane-water-2-methyl-2-propanol and cyclohexane-water-2-methyl-1-propanol at 25°C. The applicability of four semiempirical models—the NRTL and UNIQUAC models, Hiranuma's modification of the Wilson equation (Hiranuma-Wilson) and the model of Bevia et al.—together with the UNIFAC group contribution method, in LLE predictions of the systems studied is also examined. The best predictions were derived by the UNIFAC method, while the Hiranuma-Wilson approach gave the best results among the semiempirical models tested.
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