| 四元交互体系Li+,Mg2+/Cl-,SO42--H2O25℃相平衡及物化性质研究 |
| SOLUBILITIES AND PROPERTYS OF SOLUTION IN THE SYSTEM Li+, Mg2+/Cl-, SO42--H2O AT 25℃ |
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| 摘要: 本文采用等温溶解平衡法研究了四元交互体系Li+,Mg2+/CI-,SO-H2O 25℃的机关系和平衡液相的物化性质(密度、粘度、电导率、折光率和pH).该体系25℃有七个相区Li2SO4·H2O,MgSO4·7H2O,MgSO4·6H2O,MgSO4·5H2O,MgC12·6H2O,LiCI·MgCl2·7H2O,LiCI·H2O,十一条单变量线,五个共饱点。其中LiCI·H2O+LiCI·MgCl2·7H2O+Li2SO4·H2O为一致零变量点。与文献中的研究结果比较,我们得到两个新相区MgSO4·6H2O和MgSO4·5H2O.用经验和半经验公式计算了平衡液相的密度、折光率。由实验测定的溶解度数据求得了高锂浓度下的Pitzer参数。对该体系25℃溶解度进行了理论计算复证。 |
| 关键词: 含锂水盐体系 相关系 计算相图 |
| 基金项目: 国家自然科学基金 |
| Abstract: In this paper solubilities and properties (density, refractive index, viscosity, conductivityand PH) of solution were studied in the quaternary reciprocal system Li+,Mg2+/CI, SO-H2O at 25℃ by isothermal method. The isotherm of solubility in the system consists of elevenbranches and seven crystallization fields:Li2SO4·H2O, MgSO4·7H2O, MgSO4·6H2O,MgSO4·5H2O, MgCl2·6H2O, LiCI·MgCl2·7H2O, LiCI·H2O. The largest of which belongs to Li2SO4·H2O. The system has five invariant points. One of them is the congruent pointthe others are the incongruent points. Difference between the experimental and the literature forthe phase diagram of the system at 25℃ is the appearance of two new crystallization fields:MgSO4·6H2O and MgSO4·5H2O. Density, refractive index of the equilibrium liquid phasehave been calculated. Pitzer's parameters of ion interaction in quaternary reciprocal system at 25℃ were obtained from the solubility data of the titled system. The results are satisfactory. |
| Keywords: lithium salt system solubility calculation phase diagram |
| 投稿时间：1993-01-14 |
| 摘要点击次数: 2319 |
| 全文下载次数: 1778 |
| 任开武,宋彭生.四元交互体系Li+,Mg2+/Cl-,SO42--H2O25℃相平衡及物化性质研究[J].无机化学学报,1994,10(1):69-74. |
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