化工学报2019，Vol.70Issue(9)：3267-3274,8.DOI:10.11949/0438-1157.20190244
298 K和323 K条件下五元体系NaBr-KBr-MgBr2-CaBr2-H2O相平衡研究
Phase equilibria in quinary system NaBr-KBr-MgBr2-CaBr2-H2O at 298 K and 323 K
摘要
Abstract
According to the multi-component system Na-K-Ca-Mg-Sr-Li-Cl-B4O7-Br-SO4-I-H2O of underground brine in Sichuan basin, the phase equilibrium relationships of quinary systems NaBr-KBr-MgBr2-CaBr2-H2O at 298 and 323 K were studied by isothermal solution equilibrium method, the solubilities of the equilibria solution of the quinary system were determined under the corresponding temperatures, and the corresponding phase diagrams were plotted according to the phase equilibrium experiment data (saturated with KBr). The results of research show that the quinary system has complex salt at 298 K and 323 K. There is complex salt KBr·MgBr2·6H2O formation at 298 K and the phase diagram contains two co-saturated points, five dissolution isotherms and four solid crystallization regions (corresponding to KBr·MgBr2·6H2O, NaBr·2H2O, NaBr and CaBr2· 6H2O, respectively). There are two kinds of complex salts KBr·MgBr2·6H2O and 2MgBr2·CaBr2·12H2O formation at 323 K and the phase diagram contains three co-saturated points, seven dissolution isotherms and five solid crystallization regions (corresponding to KBr·MgBr2·6H2O, NaBr·2H2O, NaBr, CaBr2·4H2O and 2MgBr2·CaBr2· 12H2O, respectively).关键词
相平衡/四川盆地/地下卤水/溶解度/溴化物Key words
phase equilibria/Sichuan basin/underground brine/solubility/bromide分类
化学化工引用本文复制引用
聂国亮,桑世华,崔瑞芝..298 K和323 K条件下五元体系NaBr-KBr-MgBr2-CaBr2-H2O相平衡研究[J].化工学报,2019,70(9):3267-3274,8.基金项目
国家自然科学基金项目(41873071) （41873071）
四川省教育厅高校科研创新团队项目(15TD0009) （15TD0009）
