Stable Phase Equilibria in the Quaternary Systems LiBr–NaBr–SrBr2–H2O and LiBr–KBr–SrBr2–H2O at 288.15 K,Journal of Chemical & Engineering Data

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Stable Phase Equilibria in the Quaternary Systems LiBr–NaBr–SrBr2–H2O and LiBr–KBr–SrBr2–H2O at 288.15 K
Journal of Chemical & Engineering Data ( IF 2.6 ) Pub Date : 2022-08-15 , DOI: 10.1021/acs.jced.1c00974
Xing-Xing Zeng ₁ , Shi-Hua Sang ₁ , Xiao-Yun Qi ₁ , Xiao-Feng Guo ₁ , Rui-Zhi Cui _{2,

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Affiliation

Aiming at the composition of underground brines in the Sichuan Basin of China, stable phase equilibria in quaternary systems LiBr–NaBr–SrBr₂–H₂O and LiBr–KBr–SrBr₂–H₂O at 288.15 K are studied using the isothermal dissolution equilibrium method. The solubilities of salts in the quaternary systems listed above are measured, and the corresponding equilibrium solid phases are identified using X-ray powder diffraction. As a result, the corresponding phase diagrams of the two quaternary systems are plotted, respectively. In the two stable phase diagrams, there is no solid solution or complex salt at 288.15 K. For the quaternary system LiBr–NaBr–SrBr₂–H₂O, there are two invariant points, five univariate curves, and four solid crystallization regions, which are LiBr·2H₂O, NaBr, NaBr·2H₂O, and SrBr₂·6H₂O, respectively, of which LiBr·2H₂O has the smallest crystallization field, indicating that its solubility is the largest and it is the hardest to be precipitated from the saturated solution. There are one invariant point, three univariate curves, and three solid crystallization fields, corresponding to LiBr·2H₂O, KBr, and SrBr₂·6H₂O in the quaternary system LiBr–KBr–SrBr₂–H₂O, respectively. The experimental results show that the solubilities of salts KBr, NaBr, and SrBr₂ in the saturated solution decrease with the increasing concentration of LiBr, which indicates that LiBr has a strong salting out effect on KBr, NaBr, and SrBr₂ in the solution.

更新日期：2022-08-15

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