(Solid plus liquid) phase equilibria in the quaternary systems LiCl-Li2SO4-MgCl2-MgSO4-H2O and KCl-K2SO4-MgCl2-MgSO4-H2O at 288.15 K

被引：5

作者：

Cui, Rui-Zhi ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China

[2] Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Peoples R China

[3] Qinghai Engn & Technol Res Ctr Comprehens Utiliza, Xining 810008, Peoples R China

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2020年 / 319卷

基金：

中国国家自然科学基金;

关键词：

Brine system; Stable phase diagram; Pitzer model for thermodynamics; Solubility prediction; Lithium salt; LAKE BRINE SYSTEM; MINERAL SOLUBILITIES; NATURAL-WATERS; NA-K-MG-CA-CL-SO4-H2O SYSTEM; SOLUTION BEHAVIOR; PREDICTION; THERMODYNAMICS; MODEL; MG2+/CL; TEMPERATURES;

D O I：

10.1016/j.molliq.2020.114192

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The experimental solubility of LiCl-Li2SO4-MgCl2-MgSO4-H2O and KCl-K2SO4 -MgCl2-MgSO4-H2O systems was measured at 288.15 K. The corresponding stable phase diagrams and water content diagrams were plotted by experimental results. Double salt was formed in both two systems. There are six phase fields, nine univariant solution curves and four invariant points in the phase diagram of LiCl-Li2SO4-MgCl2-MgSO4-H2O system. And the diagram of another system has seven invariant points and eight crystallization regions. By using multiple linear regression method, parameter psi(Li,Cl,SO4) and the solubility equilibrium constants of double salt KCl center dot MgSO4 center dot 3H(2)O were obtained by solubility data fitting at 288.15 K. The equilibrium solubility of salts in above systems at the same temperature was predicted with Pi tzer's electrolyte solution model and mathematical calculation software. The results indicate that the predicted data are in correspondence with experiments. (C) 2020 Published by Elsevier B.V.

引用

页数：7

共 25 条

[21] THE PREDICTION OF MINERAL SOLUBILITIES IN NATURAL-WATERS - A CHEMICAL-EQUILIBRIUM MODEL FOR THE NA-K-CA-MG-CL-SO4-H2O SYSTEM AT TEMPERATURES BELOW 25-DEGREES-C [J].