Determination and Correlation of Solid-liquid Equilibrium of Ternary System KH2PO4-CO(NH2)2-H2O at 283.15 K

化学工业与工程

Chemcial Industry and Engineering

2021, Vol. 38

Issue (3) :64-69 DOI: 10.13353/j.issn.1004.9533.20201018

Current Issue | Next Issue | Archive | Adv Search

<< | >>

Determination and Correlation of Solid-liquid Equilibrium of Ternary System KH₂PO₄-CO(NH₂)₂-H₂O at 283.15 K

Huang Linchuan, Li Tianxiang, Yang Jiamin, Wang Xiaoli, Ou Jian, Zhu Jing

College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China

Abstract	Reference	Related Articles

Download: PDF (2154KB) HTML () Export: BibTeX or EndNote (RIS) Supporting Info

Guide

Abstract The solid-liquid phase equilibrium of KH₂PO₄-CO(NH₂)₂-H₂O at 283.15 K was studied by isothermal dissolution equilibrium method. The corresponding stable phase diagram was drawn according to the experimental results, and the composition and structure of the equilibrium solid phase were identified by wet slag method and X-ray diffraction method. The results show that there are a invariant point, two univariate curves and three crystalline regions in the phase diagram, and the system is a simple co-saturation type, no double salts or adducts were formed. Wilson equation and NRTL equation were used to calculate the solubility of ternary KH₂PO₄-CO(NH₂)₂-H₂O, and the calculated values were in good agreement with the experimental values. The relative average deviation (RAD) and root mean square deviation (RMSD) of the calculated values of Wilson equation and experimental values are 0.575% and 0.159%, respectively; the RAD and RMSD of the calculated of NRTL equation and experimental values are 1.58% and 0.136%, respectively.

	Service

	Email this article
	Add to my bookshelf
	Add to citation manager
	Email Alert
	RSS
	Articles by authors
	Huang Linchuan
	Li Tianxiang
	Yang Jiamin
	Wang Xiaoli
	Ou Jian
	Zhu Jing

Keywords： solid-liquid phase equilibrium； solubility； Wilson equation； NRTL equation

Received 2020-11-20;

Fund:

About author:

Cite this article:

Huang Linchuan, Li Tianxiang, Yang Jiamin, Wang Xiaoli, Ou Jian, Zhu Jing.Determination and Correlation of Solid-liquid Equilibrium of Ternary System KH₂PO₄-CO(NH₂)₂-H₂O at 283.15 K[J] Chemcial Industry and Engineering, 2021,V38(3): 64-69

[1] 金波. 水溶肥发展现状和存在问题的研究[J]. 盐科学与化工, 2020, 49(11):1-2, 7 Jin Bo. Development status and existing problems of water soluble fertilizer[J]. Journal of Salt Science and Chemical Industry, 2020, 49(11):1-2, 7(in Chinese)
[2] 付强强, 郑瑞永, 李万和, 等. 固体水溶性肥料生产工艺现状[J]. 磷肥与复肥, 2019, 34(5):20-22 Fu Qiangqiang, Zheng Ruiyong, Li Wanhe, et al. Production process for solid water-soluble fertilizer[J]. Phosphate & Compound Fertilizer, 2019, 34(5):20-22(in Chinese)
[3] 汪家铭. 水溶肥发展现状及市场前景[J]. 上海化工, 2011, 36(12):27-31 Wang Jiaming. Development status and market prospect of water soluble fertilizer[J]. Shanghai Chemical Industry, 2011, 36(12):27-31(in Chinese)
[4] Xie C, Zhang T, Wang X, et al. Solid-liquid phase equilibria in aqueous solutions of four common fertilizers at 303.2 K and atmospheric pressure[J]. Fluid Phase Equilibria, 2018, 474:131-140
[5] Yang H, Rasmuson Å. Phase equilibrium and mechanisms of crystallization in liquid-liquid phase separating system[J]. Fluid Phase Equilibria, 2015, 385:120-128
[6] Kwok K, Chan H, Chan C, et al. Experimental determination of solid-liquid equilibrium phase diagrams for crystallization-based process synthesis[J]. Industrial & Engineering Chemistry Research, 2005, 44(10):3788-3798
[7] 王楚, 邵月素. 化学工程第五讲结晶操作[J]. 纯碱工业, 1980, (4):38-61
[8] Rowlinson J S. Molecular thermodynamics of fluid-phase equilibria[J]. Journal of Chemical Thermodynamics, 1970, doi:10.1016/0021-9614(70)90078-9
[9] 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):41-44 Hu Xue, Zhu Jing, Wang Ruizhe, et al. Research on phase equilibrium of ternary system of(NH₂)₂CO-NH₄H₂PO₄-H₂O at 10℃[J]. Inorganic Chemicals Industry, 2019, 51(5):41-44(in Chinese)
[10] 申禹, 李玲. 钼酸铵分光光度法测定磷浓度实验方法的改进[J]. 实验技术与管理, 2013, 30(1):56-59 Shen Yu, Li Ling. Modification of ammonium molybdate spectrophotometric method for measurement of dissolved phosphorus[J]. Experimental Technology and Management, 2013, 30(1):56-59(in Chinese)
[11] 陈洁, 张吉荣. 钼锑抗分光光度法测定水中总磷的探讨[J]. 仪器仪表与分析监测, 2004, (3):34-35
[12] Friedman H. Correction. modification of determination of urea by the diacetyl monoxime method[J]. Analytical Chemistry, 1953, 25(6):990-990
[13] 刘志刚, 赵庆良, 孙丽欣, 等. PDAB比色法直接测定液相中的常量尿素[J]. 哈尔滨工业大学学报, 2008, 40(8):1214-1217 Liu Zhigang, Zhao Qingliang, Sun Lixin, et al. Determination of medium concentration urea in solution by p-dimethylaminobenzaldehyde colorimetry[J]. Journal of Harbin Institute of Technology, 2008, 40(8):1214-1217(in Chinese)
[14] Schott H. A mathematical extrapolation for the method of wet residues[J]. Journal of Chemical & Engineering Data, 1961, 6(3):324-324
[15] Lu H, Wang J, Yu J, et al. Phase equilibria for the pseudo-ternary system (NaCl+Na₂SO₄+H₂O) of coal gasification wastewater at T=(268.15 to 373.15) K[J]. Chinese Journal of Chemical Engineering, 2017, 25(7):955-962
[16] Zachariasen W. A general theory of X-ray diffraction in crystals[J]. Acta Crystallographica, 1967, 23(4):558-564
[17] John-M P, Lichtenthaler R, Azevedo E. Molecular thermodynamics of fluid-phase equilibria, Adobe Reader, 3rd Edition[M]. New Jersey:Prentice-Hall, 1999
[18] Grünbauer H, Tomlinson E. Correlation and prediction of liquid-liquid distribution coefficients in aqueous systems using a modified Wilson model[J]. Journal of Solution Chemistry, 1985, 14(7):499-512
[19] Nagata I, Tamura K, Yamada T. Correlation of liquid-liquid equilibria in aqueous and organic systems using a modified Wilson model[J]. Journal of Solution Chemistry, 1996, 25(6):567-587
[20] Miller F, Dittmar H. The solubility of urea in water, the heat of fusion of urea[J]. Journal of the American Chemical Society, 1934, 56(4):848-849
[21] 刘光启, 马连湘, 项曙光. 化学化工物性数据手册:无机卷(增订版)[M]. 北京:化学工业出版社, 2013
[22] Renon H, Prausnitz J M. Estimation of parameters for the NRTL equation for excess Gibbs energies of strongly nonideal liquid mixtures[J]. Industrial & Engineering Chemistry Process Design and Development, 1969, 8(3):413-419
[23] Li X, Du C, Zhao H. Determination and modeling of binary and ternary solid-liquid phase equilibrium for the systems formed by 3, 5-dinitrobenzoic acid, m-nitrobenzoic acid and acetone[J]. The Journal of Chemical Thermodynamics, 2017, 105:21-29
[24] 史奇冰, 郑逢春, 李春喜, 等. 用NRTL方程计算含离子液体体系的汽液平衡[J]. 化工学报, 2005, 56(5):751-756 Shi Qibing, Zheng Fengchun, Li Chunxi, et al. Calculation of vapor-liquid equilibrium for ionic liquid-containing systems with NRTL equation[J]. Journal of Chemical Industry and Engineering (China), 2005, 56(5):751-756(in Chinese)