Abstract
Separation of tungsten (W) and vanadium (V) is of great significance for the utilization of the polymetallic complex minerals and secondary resources of these elements. In this work, selective extraction of V from sodium tungstate solution was investigated using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507) as an extractant. The extraction process was studied to optimize various parameters including initial pH, extractant concentration, phase ratio (O/A), temperature, and contact time. The simulation calculation indicated W and V exist in the form of cation HW7O245− and anion VO2+, respectively, in solutions with pH ranging from 1 to 3, which provided a theoretical basis for the selective separation of W and V. In addition, under the optimum conditions (pH = 1.5, 20% (v/v) P507, O/A = 1/2, room temperature, and T = 20 min), the removal efficiency of V exceeds 90% with W loss below 6%.
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Acknowledgements
This work was financially supported by the Original Exploration Project of China (52150079), the Natural Science Foundation of China (U2004215, No. 51974280, and No. 51774252), and the Educational Commission Fund of Henan Province of China (No. 20HASTIT012, No. 18A450001, and No. 17A450001).
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Wang, H., Han, G., Huang, Y., Su, S., Liu, B., Shi, K. (2023). Selective Extraction of Vanadium from Sodium Tungstate Solution Using P507. In: Reddy, R.G., et al. New Directions in Mineral Processing, Extractive Metallurgy, Recycling and Waste Minimization. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22765-3_39
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DOI: https://doi.org/10.1007/978-3-031-22765-3_39
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