50 ℃KCl-RbCl/CsCl-H2O三元体系等温相平衡研究

Phase Diagram and Research for the Ternary System of KCl-RbCl/CsCl-H2O at 50 ℃

中文关键词:  水盐体系  氯化钾  氯化铷  氯化铯  固溶体  相平衡

英文关键词:Salt-water system  Potassium chloride  Rubidium chloride  Cesium chloride  Solid solution  Phase equilibrium 《盐湖研究》合订本征订启事 《盐湖研究》是原国家科委批准的学术类自然科学期刊,由中国科学院青海盐湖研究所主办,科学出版社出版,1993年创刊并在国内外公开发行。《盐湖研究》自公开发行以来,深受广大读者的厚爱,为了便于我刊读者和文献情报服务单位系统收藏,编辑部藏有94－95年,96－97年,98－99年,2000年,2001－2002年,2003年,2004－2005年,2006－2007年,2008－2009年合订本,每年册仅收取工本费90元。数量有限,欲购者请与《盐湖研究》编辑部联系,联系电话:[phone]

中文摘要:

      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。

英文摘要:

      :Phase equilibria in the ternary systems KCl-RbCl-H₂O and KCl-CsCl-H₂O at 50 ℃ were studied 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-CsCl-H₂O is simple eutectic type. There’s one invariant point and the compositions of w(KCl), w(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.