Measurement and Thermodynamic Model Study on Equilibrium Solubility in the Ternary System KCl-KBr-H2O at 323.15 K

被引：12

作者：

Meng, Ling-Zong ^{[1
,2
]}

Li, Dan ^{[1
]}

Ma, Cun-Yun ^{[1
]}

Liu, Kai-Xuan ^{[1
]}

机构：

[1] Linyi Univ, Sch Chem & Chem Engn, Linyi 276000, Peoples R China

[2] Tianjin Univ Sci & Technol, Tianjin Key Lab Marine Resources & Chem, Tianjin 300457, Peoples R China

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2014年 / 88卷 / 13期

关键词：

solubility; phase equilibrium; Pitzer model and Harvie-Weare solubility approach; potassium bromide; solid solution; MINERAL SOLUBILITIES; NATURAL-WATERS; PREDICTION;

D O I：

10.1134/S0036024414130135

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The solubilities and the refractive indices of the KCl-KBr-H2O system at 323.15 K were studied with the isothermal dissolution method. The phase diagram and refractive index diagram were plotted for this system at 323.15 K. There is only one crystallization field of the solid solution K(Cl, Br). The system belongs to the solid solution type. The refractive indices of the equilibrium solution varies regularly with w(KCl) increasing. The calculated refractive index data are in good agreement with the experimental data. The parameter psi(K, Cl, Br) at 323.15 K was fitted using the measured solubility data in this study. The equilibrium constant equation for the equilibrium solids at 323.15 K were obtained using the different Pitzer parameters from the literature or this work with a method using the activity product constant. The calculated solubilities agree well with experimental values.

引用

页码：2283 / 2288

页数：6

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