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Solubility Measurement and Chemical Modeling of MgSO4·7H2O in the Ti(SO4)2–H2SO4–H2O System

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    Solubility Measurement and Chemical Modeling of MgSO4·7H2O in the Ti(SO4)2–H2SO4–H2O System
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    † Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    ‡ Department of Materials Engineering, The University of British Columbia, Vancouver, B.C. Canada V6T 1Z4
    *Tel/fax: +86-10-62551557. E-mail: [email protected]
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    Journal of Chemical & Engineering Data

    Cite this: J. Chem. Eng. Data 2016, 61, 7, 2363–2370
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    https://doi.org/10.1021/acs.jced.5b01065
    Published June 7, 2016
    Copyright © 2016 American Chemical Society
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    Abstract

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    The solubility of MgSO4·7H2O in the H2SO4–H2O and Ti(SO4)2–H2SO4–H2O systems was investigated from (278.2 to 308.2) K with initial H2SO4 concentrations of (0 to 5.5) mol·kg–1 by dynamic method. It was found that the solubility of MgSO4·7H2O in the H2SO4–H2O system gradually decreased and then slightly increased with the concentration of H2SO4. Each solubility curve has its own minimum which is temperature dependent. For the MgSO4–Ti(SO4)2–H2SO4–H2O system, the solubility of MgSO4·7H2O decreased sharply with increasing concentrations of H2SO4 and Ti(SO4)2 throughout the entire range investigated. A new chemical model was developed by regression of the experimental data for MgSO4·7H2O solubility to obtain new middle range interaction parameters for the mixed-solvent electrolyte (MSE) model. The model, with the newly obtained parameters, was applied to predict the speciation, water activity, and ionic activity coefficients in the MgSO4–H2SO4–H2O and MgSO4–Ti(SO4)2–H2SO4–H2O systems.

    Copyright © 2016 American Chemical Society

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    Cited By

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    This article is cited by 5 publications.

    1. Barbara D. Weiß, Bahram Haddadi, Michael Harasek. Assessment of Modeling the MgO-CaO-CO2-SO2-H2O-O2 System Using the Electrolyte NRTL Activity Coefficient Model. Industrial & Engineering Chemistry Research 2023, 62 (32) , 12626-12639. https://doi.org/10.1021/acs.iecr.3c00868
    2. Peter M. May and Darren Rowland . Thermodynamic Modeling of Aqueous Electrolyte Systems: Current Status. Journal of Chemical & Engineering Data 2017, 62 (9) , 2481-2495. https://doi.org/10.1021/acs.jced.6b01055
    3. Yan Zhang, Juan Zhou, and Zhibao Li . Solubility of FeSO4·7H2O in the H2SO4–Ti(SO4)2–H2O, H2SO4–MgSO4–H2O, and HCl–H2O Systems from 278 to 313 K. Journal of Chemical & Engineering Data 2017, 62 (3) , 973-979. https://doi.org/10.1021/acs.jced.6b00783
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    Journal of Chemical & Engineering Data

    Cite this: J. Chem. Eng. Data 2016, 61, 7, 2363–2370
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.jced.5b01065
    Published June 7, 2016
    Copyright © 2016 American Chemical Society
    Request reuse permissions

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