Activity Coefficient of 尾-Diketone in Ammoniacal Solutions at 298.15 K

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• 作者：Qinxiang Li ; Qiyuan Chen ; Huiping Hu ; Zhiying Ding
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：February 14, 2013
• 年：2013
• 卷：58
• 期：2
• 页码：422-426
• 全文大小：272K
• 年卷期：v.58,no.2(February 14, 2013)
• ISSN：1520-5134

文摘

The solubility of 4-ethyl-1-phenyl-1,3-octadione in pure water, (NH₄)₂SO₄, NH₃ (aq), and (NH₄)₂SO₄鈥揘H₃鈥揌₂O solutions was measured by means of isothermal solution method at 298.15 K. The investigated total ammonia concentration ranges of NH₃, (NH₄)₂SO₄, and (NH₄)₂SO₄鈥揘H₃鈥揌₂O system were up to 1.8053 mol路L^鈥?, 3.0135 mol路kg^鈥?, and 6.4 mol路kg^鈥?, respectively. The experimental results indicate that the solubility of 4-ethyl-1-phenyl-1,3-octadione in NH₃ and (NH₄)₂SO₄鈥揘H₃鈥揌₂O solutions increases with the increase of total ammonia concentration. In contrast, its solubility in (NH₄)₂SO₄ solution decreases with the increase of the ammonium sulfate concentration. The Pitzer model was adopted to correlate the dependency of the solubility with the activity coefficients. The parameters obtained by the least-squares method can explain the salting effect phenomenon and can be used to calculate and predict the activity coefficients of 4-ethyl-1-phenyl-1,3-octadione in ammoniacal solutions by the Pitzer model.