(Solid plus liquid) isothermal evaporation phase equilibria in the aqueous ternary system (Li2SO4 + MgSO4 + H2O) at T=308.15 K

被引：36

作者：

Wang, Shiqiang ^{[1
,3
]}

Deng, Tianlong ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China

[2] Chengdu Univ Technol, Coll Mat Chem & Chem Engn, Chengdu 610059, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2008年 / 40卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Phase equilibrium; Phase diagram; Solubility; Pitzer modeling;

D O I：

10.1016/j.jct.2008.02.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The solubility and the density in the aqueous ternary system (Li2SO4 + MgSO4 + H2O) at T = 308.15 K were determined by the isothermal evaporation. Our experimental results permitted the construction of the phase diagram and the plot of density against composition. It was found that there is one eutectic point for (Li2SO4 center dot H2O + MgSO4 center dot 7H(2)O), two univariant curves, and two crystallization regions corresponding to lithium sulphate monohydrate (Li2SO4 center dot H2O) and epsomite (MgSO4 center dot 7H(2)O). The system belongs to a simple co-saturated type, and neither double salts nor solid solution was found. Based on the Pitzer ion-interaction model and its extended H W models of aqueous electrolyte solution, the solubility of the ternary system at T = 308.15 K has been calculated. The predicted solubility agrees well with the experimental values. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1007 / 1011

页数：5

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