Abstract
This work demonstrates the feasibility of preparing high-purity P4 by electrolysis of dissolved phosphate in molten CaCl2 without complex purification. The purity of the electrolyzed P4, obtained from Ca3(PO4)2, was comparable to commercial 99.999 pct grade product. When using phosphate rock as the precursor, pre-electrolysis is necessary to effectively removing impurities. These results highlight the advantage of molten salt electrolysis over carbothermal reduction in efficiently preparing high-purity P4.
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Acknowledgments
This work was supported by Research Center for Industries of the Future (RCIF) at Westlake University. The authors thank Dr. Yinjuan Chen, Mr. Ke Wang and Ms. Xin Li from Instrumentation and Service Center for Molecular Sciences at Westlake University for the assistance in the ICP-MS measurement. The authors also appreciate Dr. Xiaohe Miao and Ms. Ying Zhong from Instrumentation and Service Center for Physical Sciences at Westlake University for the assistance in the PXRD measurement.
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Liu, G., Zhong, Y. & Yang, X. Electrolysis of Dissolved Phosphate in Molten CaCl2 Prepares High-Purity White Phosphorus. Metall Mater Trans B 54, 2277–2282 (2023). https://doi.org/10.1007/s11663-023-02839-9
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DOI: https://doi.org/10.1007/s11663-023-02839-9