(Solid + Liquid) Phase Diagram for the Ternary Potassium Oxalate + Hydrogen Peroxide + Water System at 283.15 K and 293.15 K

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• 作者：Hong-Kun Zhao ; Dao-Sen Zhang ; Cao Tang ; Rong-Rong Li ; Wen-Lin Xu ; Ya-Qiong Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2007
• 出版时间：January 2007
• 年：2007
• 卷：52
• 期：1
• 页码：44 - 46
• 全文大小：49K
• 年卷期：v.52,no.1(January 2007)
• ISSN：1520-5134

文摘

The solubility and density of the equilibrium liquid phase for the ternary K₂C₂O₄ + H₂O₂ + H₂O system weredetermined experimentally at (283.15 and 293.15) K. The phase diagrams of the system were constructed basedon the measured solubility. The compound K₂C₂O₄·H₂O₂ was confirmed by Schreinemaker's wet residues method.At (283.15 and 293.15) K, two solid phases were formed in the ternary K₂C₂O₄ + H₂O₂ + H₂O system thatcorrespond to K₂C₂O₄·H₂O and K₂C₂O₄·H₂O₂. Results indicated that the phase diagrams of the ternary systemare similar at different temperatures. The double salt K₂C₂O₄·H₂O₂ has a bigger crystallization field than eitherK₂C₂O₄·H₂O or the mixture. The solubilities of K₂C₂O₄·H₂O and K₂C₂O₄·H₂O₂ increase slightly with increasingtemperature, while the crystalline region of the compound K₂C₂O₄·H₂O₂ decreases as the temperature increases.