Metastable Phase Equilibrium in the Aqueous Quaternary System (KCl + K2SO4 + K2B4O7 + H2O) at 308.15 K
Metastable Phase Equilibrium in the Aqueous Quaternary System (KCl + K2SO4 + K2B4O7 + H2O) at 308.15 K
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DOI：
10.1021/je700472p
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发表时间：
2008-02
影响因子：
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通讯作者：
T. Deng;Shiqiang Wang;Bai Sun
中科院分区：
文献类型：
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作者：
T. Deng;Shiqiang Wang;Bai Sun
用等温蒸发法测定了四元水相体系(KCl+K2SO4+K2B4O7+H2O)在308.15 K时的介稳溶解度及其密度、粘度、折射率、电导率和pH等物化性质。根据实验结果，绘制了干盐相图、水图和组成图的物化性质图。结果表明，在该亚稳态四元体系中，存在一个KCl+K2SO4+K2B4O7·4H2O的三盐共饱和点、三条单变曲线和三个对应于氯化钾、硫酸钾和四水合硼酸钾的亚稳结晶区。没有发现固溶体，也没有发现复盐。
Experimental studies on the metastable solubilities and the physicochemical properties including density, viscosity, refractive index, conductivity, and pH of the aqueous quaternary system (KCl + K2SO4 + K2B4O7 + H2O) at 308.15 K were determined with the method of isothermal evaporation. According to the experimental results, the dry-salt phase diagram, the water diagram, and the physicochemical properties via composition diagrams were plotted. It was found that there is one three-salt cosaturation point of KCl + K2SO4 + K2B4O7·4H2O, three univariant curves, and three metastable crystallization fields corresponding to potassium chloride, potassium sulfate, and potassium borate tetrahydrate formed in the metastable quaternary system. Neither solid solution nor double salts were found.