50℃ KCl-RbCl/CsCl-H_2O三元体系等温相平衡研究  

Phase Diagram and Research for the Ternary System of KCl-RbCl/CsCl-H_2O at 50 ℃

作　　者：张永明[1,2,3] 刘成林[1] 马黎春[1] 陈丽芳[2,3] 陈永志[1] 徐海明[1] 赵宪福[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]天津科技大学海洋科学与工程学院,天津300457 [3]天津市海洋资源与化学重点实验室,天津300457

出　　处：《盐湖研究》2013年第3期56-64,共9页Journal of Salt Lake Research

基　　金：江陵凹陷高温高压富钾卤水及地质综合研究(E1106);中央级公益性科研院所基本科研业务费专项资金(K1102);国家自然科学基金青年基金(41002028);中国地质调查项目(N1303)联合资助

摘　　要：采用等温平衡的方法测定了KCl-RbCl-H2O和KCl-CsCl-H2O三元体系50℃的等温平衡溶解度,绘制了这两个体系的相图。研究表明,KCl-RbCl-H2O为固溶体型相图,没有共饱和点,只有一个(K,Rb)Cl固相区,饱和溶液线为一单变量曲线。平衡液相中RbCl/KCl与RbCl的百分含量呈正相关和线性关系,而固相中RbCl/KCl的变化则呈非线性关系。KCl-CsCl-H2O体系属于简单共饱和体系,存在一个共饱和点,在KCl、CsCl、H2O含量分别为5.1%、64.3%、30.6%时达到共饱和。实验对完善含铷、铯卤水体系的热力学数据和富钾卤水综合开发利用具有实际意义。Phase equilibria in the ternary systems KCl-RbCl-H2O and KCl-CsCl-H2O at 50℃ were stud- ied by using the isothermal method. The phase diagrams were plotted according to the experimental data. Studies have shown that the phase diagram of KCl-RbCl-H2O is solid solution type. There＇ s no invariant point, one crystallization field of （K,Rb）Cl and one univariant curve. Studies have also shown that the ratio of RbCl/KCl is positive correlated with the content of RbCl in the liquid phase, and there is a linear between them. But in the solid phase it＇ s nonlinear. The system of KCl-CsCI-H2O is simple eutectic type. There＇s one invariant point and the compositions of to（KCl）, to（ CsCl）, w（ H2O） are 5.1%, 64. 3% and 30. 6%. The experimental is perfection to the brine date of thermodynamic which contains rubidium and cesium, and it has practical significance for the brine＇ s comprehensive utilization with rich potassium.

关 键 词：水盐体系 氯化钾 氯化铷 氯化铯 固溶体 相平衡 

分 类 号：O642.4[理学—物理化学]