Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K†
Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K†
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DOI：
10.1021/je100365c
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发表时间：
2010-08
影响因子：
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通讯作者：
Yafei Guo;H. Yin;Xian-Hua Wu;T. Deng
中科院分区：
文献类型：
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作者：
Yafei Guo;H. Yin;Xian-Hua Wu;T. Deng
Experimental studies on the metastable solubilities and physicochemical properties (density, viscosity, pH, and refractive index) of the aqueous quaternary system (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K were determined with the method of isothermal evaporation. On the basis of experimental data, the metastable phase diagram and the diagram of physicochemical properties versus composition were plotted. There are six invariant points, twelve univariant curves, and seven crystallization zones corresponding to halite, thenardite, vanthoffite (3NaSO4·MgSO4), astrakanite (NaSO4·MgSO4·4H2O), hexahydrite (MgSO4·6H2O), tetrahydrite (MgSO4·4H2O), and bischofite (MgCl2·6H2O). There is no solid solution except two double salts of vanthoffite and astrakanite which existed in the metastable system. When compared with the stable equilibrium phase diagram at 328.15 K, the crystallized zones of loeweite (6Na2SO4·7MgSO4·15H2O) and kieserite (MgSO4·H2O) disappeared; the areas of halite and hexahydrite increased; a...
