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Solid–Liquid Equilibria in the Quaternary System K+//H2PO42–, SO42–,Cl–H2O at 298.2 K and 323.2 K
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    Solid–Liquid Equilibria in the Quaternary System K+//H2PO42–, SO42–,Cl–H2O at 298.2 K and 323.2 K
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    Department of Chemical Engineering, Sichuan University, Chengdu, Sichuan, 610065, People’s Republic of China
    *E-mail: [email protected]. Tel./Fax: 0086-028-85460936.
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    Journal of Chemical & Engineering Data

    Cite this: J. Chem. Eng. Data 2016, 61, 1, 330–335
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    https://doi.org/10.1021/acs.jced.5b00579
    Published December 4, 2015
    Copyright © 2015 American Chemical Society

    Abstract

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    The solubility data of the quaternary system K+//H2PO42–, SO42–, Cl–H2O is basically required for the design and optimization of the crystallization process of KH2PO4 which is produced by the solvent extraction method using the wet-process H3PO4 and KCl as the raw materials. In this study, the solubility data of the quaternary system K+//H2PO42–, SO42–, Cl–H2O at 298.2 K and 323.2 K were investigated by the isothermal solution saturation method. The solubilities of salts and equilibrium solid phases were determined. The phase and water content diagrams were constructed based on the experimental results. The appearance of the phase diagram at 323.2 K is similar to that at 298.2 K, while the crystallization area of each salt varies slightly with the changing of temperature. The phase diagrams both contain one quaternary invariant point, three univariant curves, and three crystallization regions corresponding to KH2PO4, K2SO4, and KCl. The crystallization region of K2SO4 is the largest, while that of KCl is the smallest. The order of the three salts solubilities is KCl > KH2PO4 > K2SO4. The water content reaches its minimum value at the quaternary invariant point at each temperature.

    Copyright © 2015 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jced.5b00579.

    • XRD characterization of the solid phase at the invariant point of the quaternary system at different temperatures (PDF)

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    This article is cited by 10 publications.

    1. Soukaina El Hantati, Zineb Nour, Wiam El Fadel, Abderrahim Dinane, Brahim Messnaoui, Abderrahim Samaouali, Asmae Arbaoui. Thermodynamic Properties of the Mixture of Potassium Phosphate Fertilizer with KCl: Water Activity, Osmotic and Activity Coefficients, Excess Energy, and Solubility of KH2PO4–KCl–H2O at 298.15 K. Journal of Chemical & Engineering Data 2024, 69 (11) , 3768-3782. https://doi.org/10.1021/acs.jced.4c00324
    2. Jingli Wu, Junhu Wu, Dehua Xu, Xinlong Wang, Zhiye Zhang, Zhengjuan Yan. Thermodynamic Modeling the Solid–Liquid Phase Equilibrium of a Water–Methanol–Potassium Dihydrogen Phosphate Ternary System with a Mixed-Solvent Electrolyte (MSE) Model. Industrial & Engineering Chemistry Research 2023, 62 (25) , 9876-9885. https://doi.org/10.1021/acs.iecr.3c00906
    3. Rui-Zhi Cui, Wu Li, Ya-Ping Dong. Measurement and Prediction of Solid + Liquid Equilibria in the Quaternary System LiCl–KCl–Li2SO4–K2SO4–H2O at 288.15 K. Journal of Chemical & Engineering Data 2019, 64 (10) , 4206-4213. https://doi.org/10.1021/acs.jced.9b00271
    4. Chao Bian, Hang Chen, Xingfu Song, Yan Jin, Jianguo Yu. Stable Phase Equilibria of the Quaternary System Na+//Cl–, NO3–, SO42––H2O at 353.15 K. Journal of Chemical & Engineering Data 2018, 63 (9) , 3305-3314. https://doi.org/10.1021/acs.jced.8b00198
    5. Xiaoyan Jia, Jun Li, Yang Jin, Junyao Hu, and Yuqiang Zhang . Solid–Liquid Equilibria in the Quaternary System Na+,K+//HPO42–,Cl––H2O and Its Subsystems Na+//HPO42–,Cl––H2O, K+//HPO42–,Cl––H2O, and Na+,K+//HPO42––H2O at 298.2 K. Journal of Chemical & Engineering Data 2017, 62 (11) , 3679-3686. https://doi.org/10.1021/acs.jced.7b00413
    6. Peng-Fei Li, Lu Li, Chunyou Pan, Laibo Ma, Qing-Bai Chen. An emerging route for efficient conversion of monopotassium phosphate via a pilot-scale electrodialysis metathesis. Chemical Engineering Research and Design 2025, 213 , 42-51. https://doi.org/10.1016/j.cherd.2024.11.032
    7. Shao-Ying Ge, Li Zhu, Yu-Long Ma, Er Liu, Kang-he Zhao. Solid-liquid stable phase equilibria of the quaternary system Na+ //Cl−, SO42−, CO32−-H2O and its subsystems Na+ //Cl−, CO32−-H2O and Na+ //SO42−, CO32−-H2O at 353.15 K. The Journal of Chemical Thermodynamics 2020, 143 , 106015. https://doi.org/10.1016/j.jct.2019.106015
    8. Tao Zhang, Yaling Yang, Li Lv, Xinlong Wang, Benhe Zhong, Shengwei Tang. Preparation of potassium dihydrogen phosphate with N-methyldiethanolamine as extractant. Chemical Engineering and Processing - Process Intensification 2018, 129 , 10-16. https://doi.org/10.1016/j.cep.2018.04.033
    9. Yaling Yang, Tao Zhang, Xinlong Wang, Shengwei Tang. An investigation on the solid–liquid phase equilibrium of the quaternary system KH 2 PO 4 –H 3 PO 4 –CH 2 OHCH 2 OH–H 2 O. Fluid Phase Equilibria 2018, 464 , 12-21. https://doi.org/10.1016/j.fluid.2018.02.014
    10. Wei Shen, Yongsheng Ren, Jiajin Sun. Solid-liquid phase equilibrium and phase diagram for the reciprocal quaternary system Na+, K+//SO42,H2PO4− - H2O at 313.15 K. Fluid Phase Equilibria 2016, 429 , 196-204. https://doi.org/10.1016/j.fluid.2016.09.005

    Journal of Chemical & Engineering Data

    Cite this: J. Chem. Eng. Data 2016, 61, 1, 330–335
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.jced.5b00579
    Published December 4, 2015
    Copyright © 2015 American Chemical Society

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