Liquid−Liquid and Solid−Liquid Equilibria in Systems Containing n-Eicosane, n-Tetracosane, Ethanol, and Water
Liquid−Liquid and Solid−Liquid Equilibria in Systems Containing n-Eicosane, n-Tetracosane, Ethanol, and Water
复制标题
含有正二十烷、正二十烷、乙醇和水的系统中的液-液和固-液平衡
DOI：
10.1021/je015513f
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发表时间：
2002
影响因子：
--
通讯作者：
A. Teja
中科院分区：
文献类型：
--
作者：
K. Maeda;A. Rousseau;A. Teja
测定了在333.2K下正二十烷（C20）和正二十四烷（C24）在熔融相（L1）和乙醇水相（L2）之间以及在293.2K下在固相（S）和乙醇水相（L）之间的分配。当溶液与熔融蜡相平衡（液-液平衡）时，乙醇水溶液的蜡含量比与固体蜡相平衡（固-液平衡）时更大。C20和C24在水相和蜡相之间的分配系数在液-液平衡的情况下也显著高于固-液平衡的情况。该数据可以令人满意地模拟使用简单的热力学表达式的基础上的CABAC活度系数的方法。
The partitioning of n-eicosane (C20) and n-tetracosane (C24) between a melt phase (L1) and an aqueous ethanol phase (L2) at 333.2 K, and between a solid phase (S) and an aqueous ethanol phase (L) at 293.2 K was measured. The wax content of aqueous ethanol solutions was greater when the solutions were in equilibrium with a melt wax phase (liquid−liquid equilibrium) than when they were in equilibrium with a solid wax phase (solid−liquid equilibrium). The distribution coefficients of C20 and C24 between the aqueous phase and a wax phase were also significantly higher in the case of liquid−liquid equilibrium than in the case of solid−liquid equilibrium. The data could be modeled satisfactorily using simple thermodynamic expressions based on the UNIFAC activity coefficient approach.