K_2CO_3-KCl-H_2O三元体系298K介稳相平衡研究  

Study on the Metastable Phase Equilibrium of the Ternary System K_2CO_3-KCl-H_2O at 298 K

作　　者：闫书诚[1] 殷辉安[2] 梁渠[2] 闫书一[2] 曾英[2] 

机构地区：[1]四川大学化学学院,成都610064 [2]成都理工大学材料与化学化工学院,成都610059

出　　处：《四川化工》2009年第3期14-16,共3页Sichuan Chemical Industry

基　　金：国家自然科学基金资助项目(49773200;40673050)

摘　　要：本文报道西藏扎布耶盐湖卤水三元子体系K2CO3-KCl-H2O298 K介稳平衡实验数据,并绘制出介稳平衡相图。结果表明:该三元体系属简单共饱型,无复盐或固溶体形成;介稳平衡相图中单变度曲线(AE和BE)对应的介稳平衡固相分别为:K2CO3.3/2 H2O和KCl。与该体系对应的稳定相图比较:氯化钾、碳酸钾石与平衡相图中结晶形式一致。This paper reports the experimental data of metastable phase equilibrium of K2CO3-KCl-H2O ternary system at 298K for Zhabuye salt lake in Tibet from which the metastable phase diagram was plotted. The results indicate that his ternary system is a simple-eutectic-type one, no double salt or solid solution was found. Tow metastable solubility curves of the system correspond to tow the crystallization fields of K2CO3 3/2H2Oand KCI salts. It is found in the metastable equilibrium phase diagram that： the crystallization speciations of K2CO3 3/2H2O and KCl is the same as that in the stable equilibrium one.

关 键 词：三元体系K2CO3-KCl-H2O 介稳相平衡 扎布耶盐湖 

分 类 号：O642.42[理学—物理化学] TS311[理学—化学]