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Measurement and Modeling of the Solid–Liquid Equilibria in the Quinary System LiBr − NaBr − KBr − SrBr2 − H2O and Its Subsystems at 298.15 K.

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Title: Measurement and Modeling of the Solid–Liquid Equilibria in the Quinary System LiBr − NaBr − KBr − SrBr2 − H2O and Its Subsystems at 298.15 K.
Authors: Cui, Rui-Zhi1,2 (AUTHOR) cuirzh@isl.ac.cn, Nie, Guo-Liang1,2 (AUTHOR), Ren, Hong-Bao3 (AUTHOR), Yang, Qiu-Ye1,2 (AUTHOR), Li, Wu1,2 (AUTHOR)
Source: Journal of Solution Chemistry. Feb2026, Vol. 55 Issue 2, p290-305. 16p.
Subjects: Solid-liquid equilibrium, Phase diagrams, Mixtures, Inorganic compounds, Salt, Aqueous solutions, Sodium bromide, Potassium bromide
Abstract: Based on mother liquor rich in lithium, strontium and bromine obtained from the brine of underground oil–gas field in Qaidam Basin after pre-treatment, the isothermal dissolution equilibrium method was used to study the stable solid–liquid equilibria and phase diagrams of the quinary system LiBr − NaBr − KBr − SrBr2 − H2O and its subsystems at 298.15 K. The solubilities of solids in each system were determined, respectively, and the equilibrium solid phases were determined. In order to clearly reflect the regularities and characteristics of phase equilibria of multi-component systems, the corresponding phase diagrams were also plotted and analyzed. The Pitzer model for the quinary system was parameterized by using relevant experimental thermodynamic data. The solubilities of solids in this quinary system and its subsystems were calculated and compared with experimental results. The results not only help to reveal the thermodynamic behavior of relevant bromides in the process of brine concentration, but also provide some theoretical support for the comprehensive utilization of its brine resources. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Based on mother liquor rich in lithium, strontium and bromine obtained from the brine of underground oil–gas field in Qaidam Basin after pre-treatment, the isothermal dissolution equilibrium method was used to study the stable solid–liquid equilibria and phase diagrams of the quinary system LiBr − NaBr − KBr − SrBr2 − H2O and its subsystems at 298.15 K. The solubilities of solids in each system were determined, respectively, and the equilibrium solid phases were determined. In order to clearly reflect the regularities and characteristics of phase equilibria of multi-component systems, the corresponding phase diagrams were also plotted and analyzed. The Pitzer model for the quinary system was parameterized by using relevant experimental thermodynamic data. The solubilities of solids in this quinary system and its subsystems were calculated and compared with experimental results. The results not only help to reveal the thermodynamic behavior of relevant bromides in the process of brine concentration, but also provide some theoretical support for the comprehensive utilization of its brine resources. [ABSTRACT FROM AUTHOR]
ISSN:00959782
DOI:10.1007/s10953-025-01513-9