摘要
针对西藏扎布耶盐湖卤水组成,采用等温溶解平衡法研究了五元体系Li+, Na+//CO32-, B4O72-, Cl- -H2O 298 K下的相平衡关系。测定了该体系298 K时各组份的溶解度及平衡液相的密度、粘度、折光率、电导率和pH值等物化性质, 并绘制了该五元体系的溶解度空间立体图及平衡液相物化性质—组成图。实验表明:体系中共有3个四盐共饱点和6个单盐结晶区;无复盐和固溶体生成;也无碳酸氢盐存在;且LiCl 对硼酸盐、Na2CO3对NaCl 具有强烈的盐析作用。
In accordance with the composition of the brine of Zabuye salt lake, Tibet, phase equilibrium of the quinary system Li+, Na+//CO32-, B4O72-, Cl--H2O were studied at 298 K with isothermal method. Solubility and the physicochemical properties such as density, viscosity, refractive index, conductivity and pH value of the equilibrium solutions were determined. Based on the determined values, the solubility stereo-diagram of the quinary system, and the physicochemical properties-composition diagrams of the equilibrium solutions were plotted. The experiments showed that three 4-salt invariant points and six single salt crystallization regions were found in the system, no double salts and solid solution were formed too, and no bicarbonate existed. Strong salting-out effect of LiCl on borate and of Na2CO3 on NaCl was found in the system. The study is helpful to the comprehensive utilization of the salt lake resources.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2003年第1期1-5,共5页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金资助 (49773200)。
