Simulation studies on metastable phase equilibria in the aqueous ternary systems (NaCl-MgCl2-H2O) and (KCl-MgCl2-H2O) at 308.15 K |
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| Authors: | Tianlong Deng Baojun Zhang Dongchan Li and Yafei Guo |
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| Affiliation: | (1) Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China;(2) College of Materials, Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China |
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| Abstract: | The solubilities and densities of the aqueous metastable ternary systems (NaCl-MgCl2-H2O) and (KCl-MgCl2-H2O) at 308.15 K were determined by the isothermal evaporation method. On the basis of the experimental results, the phase diagrams
for those systems were plotted. It was found that the former system belongs to the hydrate-I type with one invariant point
of (NaCl + MgCl2·6H2O), two univariant curves, and two crystallization regions corresponding to halite (NaCl) and bischo.te (MgCl26H2O); and the latter system belongs to the type of incongruent-double salts with two invariant points of (KCl + KCl·MgCl26H2O) and (MgCl2·6H2O + KCl·MgCl2·6H2O), three univariant curves, and three crystallization regions corresponding to potassium chloride (KCl), carnallite (KCl·MgCl2·6H2O) and bischofite (MgCl2·6H2O). No solid solutions were found in both systems. |
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| Keywords: | green chemistry solar pond technique simulation metastable phase equilibrium solubility |
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