Phase equilibria of AlCl3 + FeCl3 + H2O, AlCl3 + CaCl2 + H2O, and FeCl3 + CaCl2 + H2O at 298.15 K

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• 作者：Mengxia Yuan ; Xiuchen Qiao ; Jianguo Yu
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：May 12, 2016
• 年：2016
• 卷：61
• 期：5
• 页码：1749-1755
• 全文大小：410K
• 年卷期：0
• ISSN：1520-5134

文摘

In the recovery of aluminum from coal fly ash, the phase equilibria of solid–liquid systems are important for purifying the aluminum salts. This research investigated phase equilibria of the ternary systems AlCl₃ + CaCl₂ + H₂O, AlCl₃ + FeCl₃ + H₂O, and FeCl₃ + CaCl₂ + H₂O at 298.15 K using isothermal dissolution method. The corresponding phase diagrams and density diagrams were plotted. Both AlCl₃ + CaCl₂ + H₂O and AlCl₃ + FeCl₃ + H₂O systems had one invariant point, two univariate curves, two crystallization regions, and no double salts. The FeCl₃ + CaCl₂ + H₂O system had two invariant points, three crystallization regions and a double salt (CaCl₂·2FeCl₃·8H₂O) that formed at 298.15 K. There is no solid solution in all the three systems.