摘要
用恒温方法研究了四元交互体系Ｌｉ，Ｋ／Ｃｌ，ＳＯ４—Ｈ２Ｏ５０℃，７５℃的平衡溶解度．该系统（５０℃，７５℃）的相图是由六条单变量线组成，且有五个结晶区，三个单变点．其中的一点是一致性单变点，其余的点是非一致性单变点．采用混合电解质溶液理论Ｐｉｔｚｅｒ模型，用所测得的该系统的溶解度数据可获得Ｐｉｔｚｅｒ参数．测定了该体系（２５℃）的溶解度、平衡溶液的密度、折光率；平衡固相的溶度积、蒸汽压．计算结果与实测结果一致．
The equilibrium soltlbilities of the quaternary reciprocal system Li,K/Cl,SO4-H2O at 50℃,75℃ were studied by the method of isothermal. The phase diagram of the titled system (50, 75℃ ) consists of six univariant branches and has five crystallization fields, three invariant points. one of those points is the congruent point, the others are the incongruent points.Pitier's parametfers were obtained from the solubility data of the titled system by Pitier model of mixed electrolyte solution theory. Densities, refractive in dexes of the equilibrium liquid phase, vapor pressure, solubility products of the equilibrium solid phase and solubility of the titled system (25℃) were determined. The calculational results coincided with t.he experimental ones well.
关键词
四元交互体系
相图
卤水
锂
氯化锂
提取
constant temperature quaternary reciprocal system phase diagram
