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Measurements of the Solid–Liquid Equilibria in the Quaternary System NaCl–NaBr–Na2SO4–H2O at 323 K

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Abstract

Phase equilibria of the quaternary NaCl–NaBr–Na2SO4–H2O system at 323 K were studied by the isothermal dissolution equilibrium method. The solubilities of salts and densities of saturated solutions were determined. Solid solutions [Na(Cl, Br)] were found in the experiments. The phase diagram of the quaternary system has no invariant point, but has one univariant curve at the boundary of Na(Cl, Br) and Na2SO4 crystallization fields. The experimental results show that an increase of the NaBr concentration is accompanied by an obvious increase of the solution density and the decrease of the solubilities of NaCl and Na2SO4.

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Acknowledgments

We thank the two anonymous reviewers for their valuable comments and suggestions. This work was supported by Open Funds (PLC201001, PLC201204) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), the National Natural Science Foundation of China (40973047, 41172118), the Specialized Research Fund (20125122110015) for the Doctoral Program of Higher Education of China, and the Natural Science Foundation of Hebei Province, China (D2012403010).

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Authors and Affiliations

  1. College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, People’s Republic of China

    Shi-Hua Sang, Rui-Zhi Cui & Dan Wang

  2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059, People’s Republic of China

    Shi-Hua Sang, Rui-Zhi Cui & Jia-Wen Hu

  3. College of Resources, Shijiazhuang University of Economics, Shijiazhuang, 050031, Hebei, People’s Republic of China

    Jia-Wen Hu

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  1. Shi-Hua Sang
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Correspondence to Shi-Hua Sang.

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Sang, SH., Cui, RZ., Hu, JW. et al. Measurements of the Solid–Liquid Equilibria in the Quaternary System NaCl–NaBr–Na2SO4–H2O at 323 K. J Solution Chem 42, 1633–1640 (2013). https://doi.org/10.1007/s10953-013-0061-3

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  • DOI: https://doi.org/10.1007/s10953-013-0061-3

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