Solid-liquid equilibrium and thermodynamic research of 3-Thiophenecarboxylic acid in (water plus acetic acid) binary solvent mixtures

被引:1
|
作者
Liu, Xiang [1 ]
Liang, Mengmeng [1 ]
Hu, Yonghong [1 ]
Yang, Wenge [1 ]
Shi, Ying [2 ]
Yin, Jingjing [1 ]
Liu, Yan [1 ]
机构
[1] Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China
[2] Taiyuan Qiaoyou Chem Ind Co Ltd, Taiyuan 030025, Peoples R China
关键词
3-Thiophenecarboxylic acid; Solubility; Gravimetric method; Solution thermodynamics; SOLUBILITY; ETHANOL; METHANOL; PROPANOL;
D O I
10.1016/j.tca.2014.11.008
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this study, the solubility of 3-thiophenecarboxylic acid was measured in (water + acetic acid) binary solvent mixtures in the temperature ranging from 283.15 to 338.15K by the analytical stirred-flask method under atmospheric pressure. The experimental data were well-correlated with the modified Apelblat equation and the lambda h equation. In addition, the calculated solubilities showed good agreement with the experimental results. It was found that the modified Apelblat equation could obtain the better correlation results than the lambda h equation. The experiment results indicated that the solubility of 3-thiophenecarboxylic acid in the binary solvents increased with increasing temperature, increases with increasing water contents, but the increments with temperature differed from different water contents. In addition, the thermodynamic properties of the solution process, including the Gibbs energy, enthalpy, and entropy were calculated by the van't Hoff analysis. The experimental data and model parameters would be useful for optimizing the process of purification of 3-thiophenecarboxylic acid in industry. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:45 / 50
页数:6
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