Abstract
Solubilities of C 20, C 24, C 26, C 28, n-paraffins (eicosane, tetracosane, hexacosane, octacosane) in heptane and cyclohexane have been measured for temperatures ranging from their melting points to 275 K. The experimental results are compared with values calculated by means of the Wilson, UNIQUAC and two modified NRTL equations, utilizing parameters taken from solid—liquid equilibria. The root mean square deviations of the solubility temperatures for all measured data vary from 0.11 to 1.0 K and depend on the particular equation used. The best correlation was obtained with the UNIQUAC and the modified NRTL2 equations. The existence of solid—solid first-order phase transitions in n-alkanes has been taken into consideration in the solubility curve calculations.
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