Temperature Effect on the Liquid–Liquid Equilibrium of Isopropanol + Trisodium Citrate + Water Aqueous Two-Phase Systems at T = 288.15, 298.15, 308.15, and 318.15 K,Journal of Chemical & Engineering Data

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Temperature Effect on the Liquid–Liquid Equilibrium of Isopropanol + Trisodium Citrate + Water Aqueous Two-Phase Systems at T = 288.15, 298.15, 308.15, and 318.15 K
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-04-28 , DOI: 10.1021/acs.jced.0c01093
Marziyeh Mokarizadeh ₁ , Ebrahim Nemati-Kande ₁ , Reza Azizi Adeh ₁

Affiliation

In this study, the temperature effect on the aqueous two-phase systems composed of isopropanol + trisodium citrate + water was studied by experimental measurement of the binodal curves and tie-line compositions at T = 288.15, 298.15, 308.15, and 318.15 K temperatures. It was found that the salting-out ability of the system was increased with increasing the temperature so that the extension of the two-phase area, especially in the salt-rich region, was increased by raising the temperature. Correlation of the tie-line compositions to a Seteschenow-type equation also showed that the two-phase formation tendency of the studied systems has a positive correlation with the salting-out parameters, K_ca, of this equation so that K_ca values were increased with increasing the temperature. Binodal curves at all studied temperatures were successfully fitted to two temperature-dependent equations with only three fitting parameters, simultaneously. Also, the electrolyte-Wilson model was modified as a function of temperature and used for simultaneous correlation of the tie-line data at all studied temperatures. An excellent agreement between the calculated values of the modified electrolyte-Wilson model and the experimental results was obtained.

中文翻译：

T = 288.15、298.15、308.15和318.15 K时温度对异丙醇+柠檬酸三钠+水两相系统的液-液相平衡的影响

在这项研究中，通过在T = 288.15、298.15、308.15和318.15 K的温度下通过实验测量双曲线曲线和联系线成分，研究了由异丙醇+柠檬酸三钠+水组成的水两相系统的温度效应。发现系统的盐析能力随温度升高而增加，因此两相区域的延伸，特别是在富盐区域中，通过升高温度而增加。联络线组成与Seteschenow型方程的相关性还表明，所研究系统的两相形成趋势与该方程的盐析参数K _ca呈正相关，因此K _ca值随温度升高而增加。在所有研究的温度下，双曲线都成功地拟合到两个温度相关的方程式，同时只有三个拟合参数。同样，电解质-威尔逊模型也随温度而变，并用于所有研究温度下的联系线数据的同时相关。修正后的电解质-Wilson模型的计算值与实验结果之间取得了极好的一致性。

更新日期：2021-05-13

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