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Selective Reduction and Separation of Europium from Mixed Rare-Earth Oxides from Waste Fluorescent Lamp Phosphors

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Rare Metal Technology 2017

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Europium is a critical material required for LED, florescent lamp, cell phone screen, and flat panel display production. This process recycling europium from waste lamp phosphors is an innovative method to supply europium for high technology applications. Waste phosphor powder from recycled lamps is retorted, sieved, and leached to produce a europium/yttrium leach solution. The separation of europium and yttrium from the pregnant leach solution is conducted by selectively reducing Eu(III) to Eu(II) via zinc powder and precipitating europium (II) sulfate from solution using sulfuric acid as the precipitating agent. After one stage of selective reduction and precipitation, the purity and recovery of europium (II) sulfate was greater than 95% and 80%, respectively.

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Authors and Affiliations

  1. Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA

    Mark L. Strauss & Brajendra Mishra

  2. Colorado School of Mines (Kroll Institute of Extractive Metallurgy), 1500 Illinois Street, Golden, CO, 80401, USA

    Gerard P. Martins

Authors
  1. Mark L. Strauss
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  2. Brajendra Mishra
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  3. Gerard P. Martins
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Corresponding author

Correspondence to Mark L. Strauss .

Editor information

Editors and Affiliations

  1. Pennsylvania State University , University Park, Pennsylvania, USA

    Hojong Kim

  2. The University of Saskatchewan , Saskatoon, Saskatchewan, Canada

    Shafiq Alam

  3. IND LLC , South Jordan, Utah, USA

    Neale R. Neelameggham

  4. Umicore , Olen, Belgium

    Harald Oosterhof

  5. MIT , Cambridge, Massachusetts, USA

    Takanari Ouchi

  6. WATERTOWN, Massachusetts, USA

    Xiaofei Guan

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© 2017 The Minerals, Metals & Materials Society

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Strauss, M.L., Mishra, B., Martins, G.P. (2017). Selective Reduction and Separation of Europium from Mixed Rare-Earth Oxides from Waste Fluorescent Lamp Phosphors. In: Kim, H., Alam, S., Neelameggham, N., Oosterhof, H., Ouchi, T., Guan, X. (eds) Rare Metal Technology 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51085-9_3

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