Metastable Phase Equilibrium in the Aqueous Quaternary System (KCl + K2SO4 + K2B4O7 + H2O) at 308.15 K

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• 作者：Tianlong Deng ; Shiqiang Wang ; Bai Sun
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2008
• 出版时间：February 2008
• 年：2008
• 卷：53
• 期：2
• 页码：411 - 414
• 全文大小：190K
• 年卷期：v.53,no.2(February 2008)
• ISSN：1520-5134

文摘

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.