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Solid–Liquid Phase Equilibria in the Ternary Systems (LiBO2 + NaBO2 + H2O) and (LiBO2 + KBO2 + H2O) at 288.15 K and 0.1 MPa

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Abstract

Solid–liquid phase equilibria for the two aqueous systems (LiBO2 + NaBO2 + H2O) and (LiBO2 + KBO2 + H2O) at T = 288.15 K and p = 0.1 MPa were determined using the isothermal dissolution equilibrium method. The experimental results show that the phase diagrams consist of one two-salt co-saturated invariant point, two univariant solubility isotherms, and three crystallization fields. The two systems belong to simple co-saturated type, and neither double salt nor solid solution were found. The densities change regularly as the sodium metaborate (potassium metaborate) concentration increases in solution, and reach their maximum values at the invariant point. Based on the Pitzer and its extended Harvie–Møller–Weare (HMW) model, the solubilities for the ternary systems at 288.15 K were represented, and the calculated results agree well with the experimental values.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (U1707602, U1507109, U1607123, 21773170, and 21106103), the Natural Science Foundation of Tianjin (17JCYBJC19500), and the Yangtze Scholars and Innovative Research Team in University of Ministry of Education of China (IRT-17R81).

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Authors and Affiliations

  1. College of Marine and Environmental Science, Tianjin University of Science and Technology, Tianjin, 300457, People’s Republic of China

    Shiqiang Wang, Chuncheng Shi, Juan Yang, Yafei Guo & Tianlong Deng

  2. Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin, 300457, People’s Republic of China

    Shiqiang Wang, Yafei Guo & Tianlong Deng

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  1. Shiqiang Wang
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  2. Chuncheng Shi
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Wang, S., Shi, C., Yang, J. et al. Solid–Liquid Phase Equilibria in the Ternary Systems (LiBO2 + NaBO2 + H2O) and (LiBO2 + KBO2 + H2O) at 288.15 K and 0.1 MPa. J Solution Chem 49, 353–364 (2020). https://doi.org/10.1007/s10953-020-00962-8

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