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Mechanism of Selective Precipitation of Molybdenum from Tungstate Solution

  • Luqi Zeng
  • Zhongwei Zhao
  • Guangsheng HuoEmail author
  • Xinqiang Wang
  • Haipeng Pu
Cleaner Manufacturing of Critical Metals


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.



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


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© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.School of Metallurgy and EnvironmentCentral South UniversityChangshaChina
  2. 2.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaChina

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