SOLID-LIQUID EQUILIBRIA FOR BINARY-MIXTURES CONTAINING CRESOLS, ETHYLENEDIAMINE, AND ANISOLE

Solid-liquid equilibrium phase boundaries were determined with a solid -disappearance method for binary systems composed of m-cresol, p-creso l, ethylenediamine, and anisole. Among these mixtures, intermolecular complexes formed in ethylenediamine + m-cresol and ehtylenediamine + p -cresol and a single eutectic point was exhibited on the liquidus line of anisole + m-cresol and anisole + p-cresol, respectively. To correl ate the solid-liquid equilibirum data with theoretical models, the hea t of fusion and liquid molar volume were also measured for each consti tuent. The phase-equilibrium calculations showed that the Wilson model could reproduce the liquidus lines for the systems without forming co ngruently melting compounds, and the ideal-chemical model satisfactori ly correlated the equilibrium data for the systems having aggregate fo rmation.