Determination and Correlation of LLE and SLE Data for the Methanol + Cyclohexane, Aniline + Heptane, and Phenol + Hexane System

In this paper, a laser light scattering method was used for the determination of mutual solubilities in the systems of methanol + cyclohexane, aniline + heptane, and phenol + hexane at moderate pressures. Liquid−liquid equilibria (LLE) were measured from the region of solid−liquid equilibria (SLE) to the upper critical solution temperature. Freezing points in these systems were determined by a cooling curve method. The experimentally determined cloud points were satisfactory correlated by three local-composition models (NRTL, Tsuboka−Katayama's modification of the Wilson, and the modified complete local composition suggested by Nagata and Tamura). We also attempted to predict the SLE by means of these models with the parameters obtained from the LLE data.