| 五元体系NaBr-KBr-MgBr2-CaBr2-H2O在298.15 K下的空间立体相图研究 |
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| 引用本文： | 彭昌炜,桑世华,崔瑞芝,任红保.五元体系NaBr-KBr-MgBr2-CaBr2-H2O在298.15 K下的空间立体相图研究[J].化工学报,2022,73(11):4850-4858. |
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| 作者姓名： | 彭昌炜 桑世华 崔瑞芝 任红保 |
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| 作者单位： | 1.成都理工大学材料与化学化工学院，四川 成都 610059;2.中国科学院青海盐湖研究所盐湖资源综合高效利用重点实验室，青海 西宁 810008;3.青海省盐湖资源化学重点实验室，青海 西宁 810008 |
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| 基金项目： | 国家自然科学基金项目(41873071);青海省盐湖资源化学重点实验室创新建设平台专项(2022-ZJ-Y06) |
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| 摘 要： | 为合理开发四川盆地富溴地下卤水资源，对五元体系NaBr-KBr-MgBr2-CaBr2-H2O进行了298.15 K条件下完整的相平衡与相图的研究。根据实验测定的溶解度数据，绘制出了完整的空间立体相图，NaBr·2H2O、MgBr2·6H2O和CaBr2·6H2O三种盐饱和面的干基投影相图，以及相应的含水量图。研究结果表明该五元体系在298.15 K下的空间立体相图中包含有十条单变量曲线、三个共饱点和六个结晶区（KBr结晶区、NaBr结晶区、NaBr·2H2O结晶区、MgBr2·6H2O结晶区、CaBr2·6H2O结晶区、KBr·MgBr2·6H2O结晶区）。其中KBr结晶区最大，CaBr2·6H2O结晶区最小，表明在该体系中CaBr2·6H2O的溶解度最大，KBr溶解度最小。
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| 关 键 词： | 相图 溴化物 地下卤水 相平衡 |
| 收稿时间： | 2022-06-10 |
Studies on three-dimensional phase diagram of the quinary system NaBr-KBr-MgBr2-CaBr2-H2O at 298.15 K |
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| Changwei PENG,Shihua SANG,Ruizhi CUI,Hongbao REN.Studies on three-dimensional phase diagram of the quinary system NaBr-KBr-MgBr2-CaBr2-H2O at 298.15 K[J].Journal of Chemical Industry and Engineering(China),2022,73(11):4850-4858. |
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| Authors: | Changwei PENG Shihua SANG Ruizhi CUI Hongbao REN |
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| Affiliation: | 1.College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China;2.Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, Qinghai, China;3.Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, Qinghai, China |
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| Abstract: | In order to rationally develop the bromine-rich underground brine resources in the Sichuan Basin, the complete phase equilibria and phase diagram of the quinary system NaBr-KBr-MgBr2-CaBr2-H2O at 298.15 K were studied. According to the solubility data measured in the experiment, a complete three-dimensional phase diagram, as well as the dry basis projected phase diagrams of the saturation surface with NaBr·2H2O, MgBr2·6H2O and CaBr2·6H2O were plotted respectively, and the corresponding water content diagrams were drawn respectively. The results show that the phase diagram of the quinary system at 298.15 K contains ten univariate curves, three invariant points and six crystallization regions (KBr crystallization region, NaBr crystallization region, NaBr·2H2O crystallization region, MgBr2·6H2O crystallization region, CaBr2·6H2O crystallization region, KBr·MgBr2·6H2O crystallization region). The KBr crystallization region is the largest and the CaBr2·6H2O crystallization region is the smallest, which indicates that the solubility of CaBr2·6H2O is the largest and the KBr solubility is the smallest in this system. |
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| Keywords: | phase diagram bromide underground brine resources phase equilibria |
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