三元体系Li^+,Cs^+//SO_4^(2-)-H_2O 298K稳定相平衡研究  

Stable Phase Equilibrium in the Ternary System Li^+,Cs^+//SO_4^(2-)-H_2O at 298K

作　　者：孙玖 王如燕[2] 侯向阳[2] 吴林鑫 陈佩君 曾英[1,3] 于旭东 SUN Jiu;WANG Ruyan;HOU Xiangyang;WU Linxin;CHEN Peijun;ZENG Ying;YU Xudong(College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China;Xinjiang Oilfield Company, PetroChina, Karamay 834000, China;Sichuan Collaborative Innovation Center of Panxi Strategic Mineral Resources Multi-purpose Utilization (Chengdu University of Technology), Chengdu 610059, China)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]中国石油新疆油田分公司,新疆克拉玛依834000 [3]攀西战略矿产资源综合利用四川省协同创新中心,四川成都610059

出　　处：《矿产保护与利用》2019年第2期59-63,共5页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金-盐湖联合基金(U1607121);国家自然科学基金(41473059)

摘　　要：采用等温溶解平衡法研究了三元体系Li^+,Cs^+//SO_4^(2-)-H_2O 298K稳定相平衡关系。测定了平衡液相各组分溶解度、密度和折光率数据并绘制了相应的等温平衡相图、密度-组成图和折光率-组成图。结果表明:该体系属于复杂体系,有复盐3Li_2SO_4·Cs_2SO_4·2H_2O和Li_2SO_4·Cs_2SO_4形成;其稳定相图由4个固相结晶区、4条单变量曲线和3个相称共饱点组成,4个固相结晶区分别对应Li_2SO_4·H_2O、3Li_2SO_4·Cs_2SO_4·2H_2O、Li_2SO_4·Cs_2SO_4和Cs_2SO_4。The stable phase equilibria of the ternary system Li +, Cs +// SO 4 2--H 2O at 298 K were studied using isothermal solubility equilibrium method. The solubility, density and refractive index of the equilibrium liquid phase were measured and the corresponding equilibrium phase diagram, density-composition diagram and refractive index-composition diagram were plotted. The results indicated that the system is a complex one with the formation of double salts, such as 3Li 2SO 4·Cs 2SO 4·2H 2O and Li 2SO 4·Cs 2SO 4. The stable phase diagram consists of four solid phase crystallization zones, four univariate curves and three commensurate invariant points. The four solid phase crystallization zones correspond to the salts of Li 2SO 4·H 2O, 3Li 2SO 4·Cs 2SO 4·2H 2O, Li 2SO 4·Cs 2SO 4 and Cs 2SO 4.

关 键 词：稳定相平衡 锂 铯 溶解度 复盐 

分 类 号：O642.42[理学—物理化学]