论文部分内容阅读
本文采用等温溶解平衡法研究了四元交互体系Ｌｉ＋，Ｍｇ２＋／ＣＩ－，ＳＯ－Ｈ２Ｏ２５℃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．
In this paper, the isothermal dissolution equilibrium method was used to study the relationship and the physicochemical properties (density, viscosity, conductivity, refractive index and pH) of the quaternary system Li +, Mg2 + / CI- and SO-H2O at 25 ℃. The system has seven phase zones of Li2SO4 · H2O and MgSO4 · 7H2O at 25 ℃. MgSO4 · 6H2O. MgSO 4 · 5H 2 O, MgCl 2, 6H 2 O, LiCl. MgCl2.7H2O, LiCI · H2O, eleven univariate lines, five total points. Among them, LiCI · H2O + LiCI · MgCl2 · 7H2O + Li2SO4 · H2O is consistent zero point. Compared with the results in the literature, we obtained two new phases, MgSO 4 · 6H 2 O and MgSO 4 · 5H 2 O. The density and refractive index of the equilibrated liquid phase were calculated by empirical and semi-empirical formulas. Pitzer parameters at high lithium concentration were obtained from experimentally measured solubility data. The solubility of the system 25 ℃ theoretical calculations complex evidence.