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Mechanism of Selective Precipitation of Molybdenum from Tungstate Solution

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Abstract

Selective precipitation of molybdenum (Mo) is a widely utilized method for separation of Mo from tungstate solution; however, the corresponding mechanism is still unclear. The aim of the work presented herein is to investigate the effects of the reaction time, temperature, and CuS dose on the precipitation of Mo and characterize the obtained precipitates via powder x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) analyses. The results demonstrate that sulfurized molybdenum (\( {\text{MoS}}_{ 4}^{{ 2 {-}}} \)) can be selectively precipitated as NH4CuMoS4 or Cu2MoS4 on addition of CuS depending on the reaction temperature and CuS dose, and a corresponding reaction mechanism is proposed. Under the optimum conditions of CuS/Mo = 1.5, T = 35°C, and t = 8 h, up to 99% of the Mo was selectively precipitated. The present study elucidates the mechanism of Mo precipitation and provides basic and robust guidelines for separation of Mo from tungstate solution.

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Acknowledgements

This research was supported by the Natural Science Foundation of China (No. 51174232).

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, China

    Luqi Zeng, Zhongwei Zhao, Guangsheng Huo, Xinqiang Wang & Haipeng Pu

  2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Zhongwei Zhao

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  1. Luqi Zeng
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  3. Guangsheng Huo
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Correspondence to Guangsheng Huo.

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Zeng, L., Zhao, Z., Huo, G. et al. Mechanism of Selective Precipitation of Molybdenum from Tungstate Solution. JOM 72, 800–805 (2020). https://doi.org/10.1007/s11837-019-03915-9

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