Abstract
The solubility of 11-cyanoundecanoic acid (11-CUA) in cyclohexane, n-hexane, and water was measured in the temperature range from 293.15 K to the melting temperature of the solute using a static analytical method. Enthalpy of fusion, ΔfusH, and melting temperature, Tm, were measured to be 38.33 kJ/mol and 329.85 K, respectively. The solubility data have been correlated as functions of the temperature using nonideal solution models, namely, the Buchowski (λh) equation and three local composition models (Wilson, NRTL, and UNIQUAC). The Buchowski equation gives good agreement with all experimental data. The results indicate that the molecular structure and interactions affect the solubilities significantly.
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