50℃时RbCl-CsCl-H_2O三元体系等温平衡研究  

Research on isothermal equilibrium of ternary system of RbCl-CsCl-H2_O at 50 ℃

作　　者：张永明[1,2,3] 马黎春[2] 刘成林[2] 陈丽芳[1,3] 赵海彤 

机构地区：[1]天津科技大学海洋科学与工程学院,天津300457 [2]中国地质科学院矿产资源研究所 [3]天津市海洋资源与化学重点实验室 [4]深圳中航资源有限公司

出　　处：《无机盐工业》2014年第1期21-23,60,共4页Inorganic Chemicals Industry

基　　金：江陵凹陷高温高压富钾卤水综合研究与利用项目(E1106);中央级公益性科研院所基本科研业务费专项资金(K1010;K1102);国家自然科学基金(41002028)

摘　　要：采用等温平衡的方法测定了RbCl-CsCl-H2O三元体系在50℃条件下的等温平衡溶解度,并绘制了该体系相图。研究表明,该体系属于简单共饱和体系,存在一个共饱和点,在氯化铷、氯化铯、水质量分数分别为22.3%、53.8%、23.9%时氯化铷和氯化铯达到共饱和。固相晶体由氯化铷纯盐开始到氯化铷和氯化铯两种盐共同析出,最后是氯化铯纯盐析出。本研究对完善含铷、铯盐湖卤水及地下卤水等体系的溶液化学、热力学模型和卤水资源的综合开发利用具有重要意义。The isothermal equilibrium solubility of the ternary system of RbC1-CsC1-H20 was studied at 50 ℃ by the isother- mal equilibrium method.The isothermal equilibrium phase diagrams were plotted in line with the experimental data.Research results showed that the phase diagram of RbC1-CsC1-H20 was a simple euteetie type where one saturation point was found to have the compositions of 22.3%RBC1,53.8% CsCl,and 23.9% H20 by mass,respectively.At this time,RbC1 and CsC1 both achieved the saturation point.The salting-out solid-phase crystal was pure RbC1 salt at first, then was RbC1 and CsCI two com- mon salt precipitation, and finally was pure CsC1.The study provided fundamental thermodynamic data for salt lake and un- derground brine,and had a practical significance for comprehensive utilization of the solution chemistry,thermodynamic model, and brine systems that contain rubidium and cesium.

关 键 词：氯化铷 氯化铯 水盐体系 相平衡 

分 类 号：TQ131.1[化学工程—无机化工]