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Determination and correlation for solid-liquid phase equilibrium of ternary KCl-NH4Cl-H2O and KH2PO4-NH4H2PO4-H2O systems at 283.15 K
Received date: 2020-07-11
Online published: 2021-01-08
The solubility of ternary systems KCl-NH4Cl-H2O and KH2PO4-NH4H2PO4-H2O were determined by isothermal dissolution equilibrium method at 283.15 K.The structure and composition of the equilibrium solid phase were determined by the combination of X-ray diffraction and Schreinemakers′ wet residue method.Results showed that the equilibrium solid pha-se of two systems had solid solutions of partially miscible,which respectively contained one co-saturation crystallization point,two univariate curves and six zones.The solubility data of the two systems were correlated and calculated by Pitzer model.Results showed that the maximum relative error and the minimum relative error of calculated data of KCl-NH4Cl-H2O ternary system were 3.096 9% and 0.038 3% resepectively,and the maximum relative error and the minimum relative error of calculated data of KH2PO4-NH4H2PO4-H2O ternary system were 5.935 6% and 0.069 8% resepectively.The calculated value of Pitzer model was basically consistent with the experimental value.
Key words： phase equilibrium; solubility; Pitzer model; solid solution
Jiamin Yang , Jing Zhu , Xue Hu , Qiang Wu , Tianxiang Li . Determination and correlation for solid-liquid phase equilibrium of ternary KCl-NH4Cl-H2O and KH2PO4-NH4H2PO4-H2O systems at 283.15 K[J]. Inorganic Chemicals Industry, 2021 , 53(1) : 30 -35 . DOI: 10.11962/1006-4990.2020-0103
| [1] | Pitzer K S. Thermodynamics of electrolytes.I.Theoretical basis and general equations[J]. The Journal of Physical Chemistry, 1973,77(2):268-277. |
| [2] | Pitzer K S, Mayorga G. Thermodynamics of electrolytes.Ⅲ.Activity and osmotic coefficients for 2-2 electrolytes[J]. Journal of Solution Chemistry, 1974,3(7):539-546. |
| [3] | Wilson G M. Vapor-Liquid equilibrium.XI.A new expression for the excess free energy of mixing[J]. Journal of the American Chemical Society, 1964,86(2):127-130. |
| [4] | Renon H, Prausnitz J M. Estimation of parameters for the NRTL eq-uation for excess gibbs energies of strongly nonideal liquid mixtur-es[J]. Industrial & Engineering Chemistry Process Design and De-velopment, 1969,8(3):413-419. |
| [5] | Fu Y H, Sandier S I, Orbey H. A modified UNIQUAC model that in-cludes hydrogen bonding[J]. Industrial & Engineering Chemistry Research, 1995,34(12):4351-4363. |
| [6] | Fatima F, Cristina F, António A. Solubilities for six ternary systems:NaCl+NH4Cl+H2O,KCl+NH4Cl+H2O,NaCl+LiCl+H2O,KCl+LiCl+H2O,NaCl+AlCl3+H2O,and KCl+AlCl3+H2O at T=(298 to 333) K[J]. Journal of Chemical & Engineering Data, 2005,50(4):1470-1477. |
| [7] | Yu X, Zeng Y, Zhang Z. Solid-liquid metastable phase equilibria in the ternary systems KCl+NH4Cl+H2O and NH4Cl+MgCl2+H2O at 298.15 K[J]. Journal of Chemical & Engineering Data, 2012,57(6):1759-1765. |
| [8] | Zhao B, Geng G Y, Chen J X, et al. The ternary system phase equili-brium of KCl-NH4Cl-H2O at 80 ℃[J]. Advanced Materials Resear-ch, 2013,834/835/836:519-522. |
| [9] | 赵长伟, 马沛生, 郭瓦力, 等. KCl-NH4Cl-H2O三元水盐体系溶解度的研究[J]. 化学工业与工程, 2003,20(3):145-149. |
| [10] | 樊彩梅, 舒兰, 余华瑞, 等. 含固溶体三元体系K2SO4-(NH4)2SO4-H2O 和 KCl-NH4Cl-H2O溶解度的计算[J]. 高校化学工程学报, 1998,12(1):65-70. |
| [11] | 胡雪, 朱静, 王睿哲, 等.( NH2)2CO-NH4H2PO4-H2O三元系10 ℃相平衡研究[J]. 无机盐工业, 2019,51(5):47-50. |
| [12] | 吴强, 胡雪, 朱静, 等. KH2PO4-KCl-H2O、NH4H2PO4-NH4Cl-H2O三元体系283.15 K相平衡研究[J]. 无机盐工业, 2020,52(11):24-28. |
| [13] | 刘光启, 马连湘, 刘杰. 化学化工物性数据手册无机卷[M]. 北京: 化学工业出版社, 2004. |
| [14] | 陆杏英. 钼锑抗比色法测定土壤中的总磷[J]. 环境科学技术, 1991,4(3):33-34. |
| [15] | 宋学兰, 巫倩, 李艳. 硝酸中微量氯离子测定方法探讨[J]. 中氮肥, 2009(1):59-63. |
| [16] | 刘越, 李琰, 陈珮豪, 等. 甲醛法测定铵盐中氮含量实验的改进[J]. 大学化学, 2015,30(1):45-48. |
| [17] | Harvie C E, Eugster H P, Weare J H. Mineral equilibria in the six-component seawater system,Na-K-Mg-Ca-SO4-Cl-H2O at 25 ℃.Ⅱ:Compositions of the saturated solutions[J]. Geochimica Et Co-smochimica Acta, 1982,46(9):1603-1618. |
| [18] | Pitzer K S, Mayorga G. Thermodynamics of electrolytes.Ⅱ.Activity and osmotic coefficients for strong electrolytes with one or both ions univalent[J]. The Journal of Physical Chemistry, 1973,77(19):2300-2308. |
| [19] | Pitzer K S, Kim J J. Thermodynamics of electrolytes.Ⅳ.Activity and osmotic coefficients for mixed electrolytes[J]. Journal of the Ame-rican Chemical Society, 1974,96(18):5701-5707. |
| [20] | Partanen J I. Mean activity coefficients and osmotic coefficients in aqueous solutions of salts of ammonium ions with univalent anions at 25 ℃[J]. Journal of Chemical & Engineering Data, 2012,57(10):2654-2666. |
| [21] | Silvester L F, Pitzer K S. Thermodynamics of electrolytes.X.Enth-alpy and the effect of temperature on the activity coefficients[J]. Journal of Solution Chemistry, 1978,7(5):327-337. |
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