Solid–Liquid Phase Equilibrium of trans-Cinnamic Acid in Several Alcohols: Measurements and Thermodynamic Modeling

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• 作者：Juan Li ; Zuo-Xiang Zeng ; Li Sun ; Wei-Lan Xue ; Hui-Hui Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：March 10, 2016
• 年：2016
• 卷：61
• 期：3
• 页码：1192-1198
• 全文大小：299K
• ISSN：1520-5134

文摘

The solubilities of trans-cinnamic acid (t-CA) in methanol, ethanol, propanol, n-butanol, isopropyl alcohol, and isobutyl alcohol were measured by a synthetic method at temperatures ranging from (283.15 to 333.15) K. The modified Apelblat equation, the λh equation, and activity coefficient models (nonrandom two-liquid, NRTL; universal quasichemical, UNIQUAC) were used to correlate these data. It was found that all of the models show good agreement with the experimental data, and the modified Apelblat equation and NRTL model give better correlation results. Furthermore, on the basis of the NRTL model and experimental data, the thermodynamic excess functions (G^E, S^E, H^E) of t-CA + alcohols (methanol, ethanol, propanol, n-butanol, isopropyl alcohol, and isobutyl alcohol) system were determined.