摘要
采用等温溶解平衡法研究了四元体系Na+K+∥CO32-B4O72-H2O298K时的相关系。该四元体系298K时的溶解度等温图含有5个相区Na2B4O7·10H2OK2B4O7·4H2ONa2CO3·10H2OK2CO3·3/2H2O和复盐Na2CO3·K2CO3·H2O7条单变量曲线和3个共饱点其中Na2CO3·K2CO3·H2O+K2CO3·3/2H2O+K2B4O7·4H2O为相称共饱点。体系中发现了一种新的复盐Na2CO3·K2CO3·H2O这种复盐同时存在于含Na+K+∥CO32-H2O三元体系的其它四元或高元体系中。
Zabuye saline lake, Tibet, China, is unrivalled in the world for its high concentration of chloride, sulfate, carbonate and borate of lithium, sodium and potassium. The composition of the brine can be regarded as 7 component system Li+ ,Na+ ,K+ ∥ Cl- ,SO42- ,CO32- ,B4O72- H2O. As a part of study on the phase equilibrium of the 7 component system, the equilibrium solubility and phase diagram of Na+ ,K+ ∥ CO32- ,B4O72- H2O quaternary reciprocal system at 298K were studied by isothermal method. The isothermal solubility of this quaternary system consists of five crystallization fields (Na2B4O7· 10H2O,K2B4O7· 4H2O,Na2CO3· 10H2O,K2CO3· 3/2H2O and Na2CO3· K2CO3· H2O), seven univariant curves and three invariant points(two of them are incongruent points and another is congruent). A new kind of complex salt Na2CO3· K2CO3· H2O is found in the Na+ ,K+ ∥ CO32- ,B4O72- H2O quaternary system, and this complex salt also exists in the others quaternary or higher component systems which contain the Na+ ,K+ ∥ CO32- H2O ternary system.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2001年第5期665-668,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.49773200)
地质矿产部现国土资源部"九.五"重点学科生长点基金联合资助。
