化学工程2025，Vol.53Issue(11)：54-59,6.DOI:10.3969/j.issn.1005-9954.2025.11.010
298.15K下五元体系KBr-MgBr2-CaBr2-SrBr2-H2O的相平衡及相图
Phase equilibria and phase diagrams in quinary system KBr-MgBr2-CaBr2-SrBr2-H2O at 298.15 K
摘要
Abstract
In order to comprehensively develop and utilize the bromine-rich underground brine resources in the Qaidam Basin,the solid-liquid stable phase equilibrium and phase diagram of the quinary system KBr-MgBr2-CaBr2-SrBr2-H2O at 298.15 K were studied.The compositions of the liquid and solid phases at 298.15 K were determined after equilibrated.The three-dimensional phase diagram of the system,the dry-base projected phase diagrams saturated with the four original components(KBr,MgBr2·6H2O,CaBr2·6H2O,SrBr2·6H2O),the distribution of the water content and the variation of the saturated material content were plotted respectively.The results of the three-dimensional phase diagram of the quinary system show that there is neither solid solution nor dehydrated salt,no dehydration of the four original components,meanwhile KBr and MgBr2·6H2O form a complex salt of brominated carnallite(KBr·MgBr2·6H2O)at 298.15 K.The phase diagram of this quinary system contains five solid-phase crystalline regions,and the solubility of the solid-phase crystalline regions can be seen in the following order of CaBr2·6H2O＞MgBr2·6H2O＞KBr·MgBr2·6H2O＞SrBr2·6H2O＞KBr.关键词
地下卤水/溶解度/稳定相平衡/相图/溴化物Key words
underground brine/solubility/stable phase equilibrium/phase diagram/bromide分类
化学化工引用本文复制引用
王亚丽,崔瑞芝,任红保,杨秋叶,聂国亮,李武..298.15K下五元体系KBr-MgBr2-CaBr2-SrBr2-H2O的相平衡及相图[J].化学工程,2025,53(11):54-59,6.基金项目
青海省自然科学基金资助项目(2024-ZJ-901) （2024-ZJ-901）
