1. Solid−Liquid Equilibria of Nonanedioic Acid in Binary Ethanol + Water Solvent Mixtures from (292.35 to 345.52) K.
- Author
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Su-ning Chen, Qing Xia, Dong Li, Wei-Guang Yuan, Feng-Bao Zhang, and Guo-Liang Zhang
- Subjects
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SOLID-liquid equilibrium , *CHEMICAL systems , *CARBOXYLIC acids , *ALCOHOL , *WATER , *SOLVENTS , *MIXTURES , *SOLUBILITY - Abstract
Solubilities of nonanedioic acid in binary ethanol + water solvent mixtures have been determined by the dynamic method using a laser monitoring observation technique over a temperature range from (292.35 to 345.52) K and a solvent composition, mole fraction of ethanol of solute-free x20, range from 0.0 to 1.0. The experimental results showed that in pure water the solubility of nonanedioic acid increased slowly with temperature below 342.77 K but increased significantly above 342.77 K. The nonanedioic acid + ethanol + water system was found to exhibit a synergistic effect on solubility. The fusion enthalpy and melting temperature of nonanedioic acid were measured by differential scanning calorimetry. The modified λhequation, the Wilson equation, and the NRTL equation have been applied to correlate a subset of the experimental data. These models can successfully describe the solubility of nonanedioic acid in the binary mixtures with an ethanol mole fraction higher or equal to 0.2811. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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