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Separation of Molybdenum from Acidic High-Phosphorus Tungsten Solution by Solvent Extraction

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An Erratum to this article was published on 13 April 2017

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Abstract

A solvent-extraction process for deep separation of molybdenum from an acidic high-phosphate tungsten solution was developed using tributyl phosphate (TBP) as the extractant and hydrogen peroxide (H2O2) as a complexing agent. The common aqueous complexes of tungsten and molybdenum (PMoxW12−xO40 3−, x = 0–12) are depolymerized to {PO4[Mo(O)2(O–O)]4}3− and {PO4[W(O)2(O–O)]4}3− by H2O2. The former can be preferentially extracted by TBP. The extractant concentration, phase contact time, H2O2 dosage, and H2SO4 concentration were optimized. By employing 80% by volume TBP, O:A = 1:1, 1.0 mol/L H2SO4, 1.0 mol/L H3PO4, a contact time of 2 min, and a molar ratio of H2O2/(W + Mo) equal to 1.5, 60.2% molybdenum was extracted in a single stage, while limiting tungsten co-extraction to 3.2%. An extraction isotherm indicated that the raffinate could be reduced to <0.1 g/L Mo in six stages of continuous counter-current extraction.

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  • 13 April 2017

    An erratum to this article has been published.

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Acknowledgement

The authors express sincere thanks to the NSFC (Natural Science Foundation of China, No. 51334008) for financial support.

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Authors and Affiliations

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

    Yongli Li & Zhongwei Zhao

  2. Key Laboratory of Hunan Province for Metallurgy and Material Processing of Rare Metals, Changsha, 410083, China

    Zhongwei Zhao

Authors
  1. Yongli Li
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  2. Zhongwei Zhao
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Correspondence to Zhongwei Zhao.

Additional information

The original version of this article was revised. Erroneous units were corrected.

An erratum to this article is available at https://doi.org/10.1007/s11837-017-2355-1.

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Li, Y., Zhao, Z. Separation of Molybdenum from Acidic High-Phosphorus Tungsten Solution by Solvent Extraction. JOM 69, 1920–1924 (2017). https://doi.org/10.1007/s11837-017-2329-3

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  • DOI: https://doi.org/10.1007/s11837-017-2329-3

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