| 四元体系Na+,K+∥CO32-,B4O72--H2O 298K相平衡研究 |
| A Study on the Phase Equilibrium of the Quaternary System Na+,K+∥CO32-,B4O72-H2O at 298K |
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| 摘要: 采用等温溶解平衡法研究了四元体系Na+,K+∥CO32-,B4O72--H2O 298K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:Na2B4O7·10H2O,K2B4O7 |
| 关键词: 四元体系 溶解度测定 等温溶解平衡法 |
| 基金项目: 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. |
| Abstract: 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). Anew 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. |
| Keywords: quaternary system solubility determination isothermal method |
| 投稿时间：2001-03-02 修订日期：2001-05-09 |
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| 曾英,殷辉安,唐明林.四元体系Na+,K+∥CO32-,B4O72--H2O 298K相平衡研究[J].无机化学学报,2001,17(5):665-668. |
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