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Solid–Liquid Equilibria for the Binary Systems Naphthalene or Biphenyl + 1-Tetradecanol or + 1-Hexadecanol
Journal of Solution Chemistry ( IF 1.4 ) Pub Date : 2023-07-28 , DOI: 10.1007/s10953-023-01310-2
Luis Felipe Sanz , Juan Antonio González , Fernando Hevia , Isaías García de la Fuente , José Carlos Cobos

A differential scanning calorimetric technique has been used to obtain solid–liquid equilibrium temperatures for the mixtures naphthalene or biphenyl + 1-tetradecanol, or + 1-hexadecanol. All the systems show a simple eutectic point, whose final composition was determined by means of the Tamman’s plots using the needed values of the eutectic heat and of the heat of melting, which are also reported. DISQUAC interaction parameters for the OH/aromatic contacts in the selected systems are given. The present experimental SLE phase diagrams are similarly described by DISQUAC and UNIFAC (Dortmund) models. However, the comparison of DISQUAC and UNIFAC results for systems involving naphthalene and shorter 1-alkanols (methanol + 1-octanol) reveals that the temperature dependence of the interaction parameters is more suitable in DISQUAC. The systems are also investigated in terms of the concentration-concentration structure factor. It is shown that the positive deviations from the Raoult’s law of the studied solutions become weaker when the homocoordination decreases.



中文翻译:

二元体系萘或联苯 + 1-十四醇或 + 1-十六醇的固液平衡

差示扫描量热技术已用于获得萘或联苯 + 1-十四醇或 + 1-十六醇混合物的固液平衡温度。所有系统都显示出一个简单的共晶点,其最终成分是通过使用共晶热和熔化热所需值的塔曼图确定的,这些值也已报告。给出了所选系统中 OH/芳香族接触点的 DISQUAC 相互作用参数。目前的实验 SLE 相图同样由 DISQUAC 和 UNIFAC (Dortmund) 模型描述。然而,对于涉及萘和较短的 1-烷醇(甲醇 + 1-辛醇)的体系,DISQUAC 和 UNIFAC 结果的比较表明,相互作用参数的温度依赖性更适合 DISQUAC。还根据浓度-浓度结构因子对系统进行了研究。结果表明,当同配位降低时,所研究的解与拉乌尔定律的正偏差变弱。

更新日期:2023-07-28
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