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Effect of H2O2 and Ethylene Glycol on Molybdenite Dissolution in H2SO4 Solution

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Abstract

The leaching behavior of molybdenite was investigated in H2O2–H2SO4 solution in this paper. The results show that H2O2 was an effective oxidant for molybdenite leaching, but it had fast decomposition kinetics. A final molybdenum extraction of 73.0% was obtained under the experimental conditions of 0.5 mol/L H2SO4, 0.5 mol/L H2O2, and the fresh H2O2 addition enhanced molybdenum extraction from 73.0 to 94.5%. The leaching process was controlled by a mixture of surface reactions and diffusion, and the activation energy was 27.98 kJ/mol. Ethylene glycol enhanced molybdenum extraction and improved the stability of H2O2. Electrochemical studies suggested that the decomposition kinetics of H2O2 was faster than that of molybdenite oxidation, and ethylene glycol enhanced recovery by increasing the resistance of H2O2 decomposition and decreasing the resistance of molybdenite oxidation. XRD and XPS analysis confirmed that ethylene glycol did not alter the phase composition and the surface chemical statues of molybdenite.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [No. 51574072 and No. 51434001] and the Fundamental Research Funds for the Central Universities [No. 2025028].

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Authors and Affiliations

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang, 110819, Liaoning Province, People’s Republic of China

    Yunlong Bai, Wei Wang, Feng ** Zhu & Diankun Lu

  2. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning Province, People’s Republic of China

    Yunlong Bai, Wei Wang, Feng ** Zhu & Diankun Lu

  3. College of Zi** Mining, Fuzhou University, Fuzhou, 350108, Fujian Province, People’s Republic of China

    Kaixi Jiang

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  1. Yunlong Bai
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Bai, Y., Wang, W., **e, F. et al. Effect of H2O2 and Ethylene Glycol on Molybdenite Dissolution in H2SO4 Solution. Trans Indian Inst Met 76, 39–47 (2023). https://doi.org/10.1007/s12666-022-02702-6

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