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The solubilities of sebacic acid in mixed solvents n-propanol + water have been measured by a dynamic method using a laser monitoring observation technique over a temperature range (288 to 351) K. A synergistic effect on solubility was found to occur in sebacic acid + n-propanol + water mixed systems. To detect the synergistic effect, solubilities of sebacic acid in 14.35 %, 36.97 %, 79.81 %, and 90.00 % mole fraction ethanol aqueous solution were determined to supplement our previous report. A weak synergistic effect was found for sebacic acid + ethanol + water mixed systems. The solid−liquid equilibrium (SLE) data have been fitted using the λhequation, the Wilson equation, and the NRTL equation. The comparison between the experimental and the calculated solubilities for the three models is reasonable, and the root-mean-square deviations for each system range from (0.30 to 1.95) K. [ABSTRACT FROM AUTHOR]

The solubility of 2-aminopyridine in (ethanol + n-butyl acetate) mixed solvents has been measured in the temperature range from (288.15 to 318.15) K by a static analytical method. The concentrations of the 2-aminopyridine in the saturated solution were analyzed by UV spectrometry. A semiempirical equation was proposed to correlate the experimental data. [ABSTRACT FROM AUTHOR]