Solubility and Stability of Nesquehonite (MgCO3•H2O) in Mixed NaCl + MgCl2, NH4Cl + MgCl2, LiCl, and LiCl + MgCl2 Solutions

被引：17
|
作者：
Dong, Mei [1 ,2 ]
Li, Zhibao [1 ]
Mi, Jianguo [2 ]
Demopoulos, George P. [3 ]
机构：
[1] Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
[2] Beijing Univ Chem Technol, Dept Chem Engn, Beijing 100029, Peoples R China
[3] McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 2B2, Canada
来源：
JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2009年 / 54卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Isothermal dissolution - Mixed solution - Nesquehonite - Sem examinations - Temperature increment - Temperature range;
D O I：
10.1021/je900054j
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The solubility and stability of nesquehonite (MgCO3 center dot 3H(2)O) in mixed solutions (NaCl + MgCl2, NH4Cl + MgCl2, LiCl, and LiCl + MgCl2) were measured by using a classic isothermal dissolution method over the temperature range of (298 to 308) K. The concentration investigated for all salts was up to 0.2 mol.dm(-3) NaCl, 1.5 mol.dm(-3) NH4Cl, 0.6 mol.dm(-3) MgCl2, and 1.5 mol.dm(-3) LiCl at ambient temperature. The solubility of MgCO3 center dot 3H(2)O phases in all the cases investigated was found to increase with the temperature increment. The comparison of solubility in MgCl2 solutions and NaCl + MgCl2, NH4Cl + MgCl2, and LiCl + MgCl2 mixed solutions has been investigated. XRD and SEM examination of the equilibrated solids showed that nesquelionite in all cases is stable in the temperature range of (298 to 308) K.
引用
收藏
页码：3002 / 3007
页数：6
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