Experimental Measurement and Correlation of Solubility of Pentachloropyridine and Tetrachloropyridine in Methanol, Ethanol, and 2-Propanol

The solubilities of pentachloropyridine (PCP) and tetrachloropyridine (TECP) in methanol, ethanol, and 2-propanol were measured respectively using an analytical method from (293.15 to 355.15) K. From the thermodynamics theory of solid−liquid equilibrium, the solubility model was derived, and the experimental data were regressed. The average deviation of the model was smaller than 5 %. The fusion enthalpies (ΔfusH) of PCP, TECP, and their infinite-dilution activity coefficientes (γ2∞) in methanol, ethanol, and 2-propanol were obtained by regressing the experimental data.