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

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL

Journal of Solution Chemistry Pub Date : 2025-10-07 DOI:10.1007/s10953-025-01513-9

Rui-Zhi Cui, Guo-Liang Nie, Hong-Bao Ren, Qiu-Ye Yang, Wu Li

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引用次数: 0

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.

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298.15 K下LiBr - NaBr - KBr - SrBr2 - H2O及其子系统固液平衡的测量与模拟

以柴达木盆地地下油气田卤水预处理后获得的富锂、锶、溴母液为基础，采用等温溶解平衡法研究了298.15 K下LiBr−NaBr−KBr−SrBr2−H2O五元体系及其子系统的稳定固液平衡和相图。测定了各体系中固体的溶解度，并测定了平衡固相。为了更清晰地反映多组分体系相平衡的规律和特点，还绘制并分析了相应的相图。利用相关的热力学实验数据，对五元体系的Pitzer模型进行了参数化。计算了该五元体系及其子系统中固体的溶解度，并与实验结果进行了比较。研究结果不仅有助于揭示相关溴化物在卤水浓缩过程中的热力学行为，而且为其卤水资源的综合利用提供一定的理论支持。

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来源期刊

Journal of Solution Chemistry 化学-物理化学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Journal of Solution Chemistry offers a forum for research on the physical chemistry of liquid solutions in such fields as physical chemistry, chemical physics, molecular biology, statistical mechanics, biochemistry, and biophysics. The emphasis is on papers in which the solvent plays a dominant rather than incidental role. Featured topics include experimental investigations of the dielectric, spectroscopic, thermodynamic, transport, or relaxation properties of both electrolytes and nonelectrolytes in liquid solutions.