Measurement of Mineral Solubilities in the Ternary Systems NaCl–PbCl2–H2O and MgCl2–PbCl2–H2O at 373 K
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In this paper, isothermal solubility equilibrium method was used to study the mineral solubilities of two ternary systems sodium chloride-lead chloride-water and magnesium chloride-lead chloride-water at 373 K. The solubilities of the salt minerals and the densities of saturated solution in these systems were measured at 373 K. Based on the determined equilibrium solubility data and the corresponding equilibrium solid phase, the isothermal solubility diagrams of the ternary systems were shown, respectively. The results show that both the two ternary systems are simple total saturated at 373 K that neither double salt nor solid solution produced under the condition. Besides, the isothermal solubility diagrams of the two ternary systems at 373 K are both constituted of a eutectic point, two isothermal solubility curves and two solid crystalline phase regions. The two equilibrium solid phases corresponding to the eutectic point of the sodium chloride-lead chloride-water ternary system are NaCl and PbCl2. The two equilibrium solid phases corresponding to the eutectic point of the magnesium chloride-lead chloride−water ternary system are MgCl2 · 6H2O and PbCl2. The experimental result of density was simply discussed.
Keywords:equilibrium solubility lead-zinc ore sodium chloride lead chloride magnesium chloride
This project was supported by the National Natural Science Foundation of China (41873071) and Geological Research Funded Projects in Geology and Mineral Bureau of GuiZhou Province in China (2012, no. 05; 2015 no. 05).
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