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Hydrometallurgical Recovery of Indium from Flat-Panel Displays of Spent Liquid Crystal Televisions

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Abstract

A recovery process for indium from waste liquid crystal display panels was developed on the basis of hydrometallurgical technology. The powdered sample was leached with 3 M HCl to extract its various metal constituents (indium, aluminum, tin, etc.). The mutual separation and subsequent recovery of the dissolved metals was achieved using two column adsorption tests: The first column was packed with a porous resin impregnated with Aliquat 336, a commercially available solvent extraction reagent based on a quaternary ammonium compound, and the resin contained in the second column was impregnated with Cyanex 923, also a commercially available solvent extraction reagent based on trialkylphosphine oxide. In the first column, tin, iron, and zinc were removed from the leach liquor. In the second column, only indium was selectively recovered. The metal ions trapped in these columns were eluted with 0.1 M H2SO4, yielding a solution purified indium solution with a concentration 10 times that of the feed solution.

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Authors and Affiliations

  1. Department of Applied Chemistry, Saga University, Saga, 840-8502, Japan

    Katsutoshi Inoue

  2. Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, S7N 5A9, Canada

    Shafiq Alam

Authors
  1. Katsutoshi Inoue
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  2. Shafiq Alam
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Correspondence to Shafiq Alam.

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Inoue, K., Alam, S. Hydrometallurgical Recovery of Indium from Flat-Panel Displays of Spent Liquid Crystal Televisions. JOM 67, 400–405 (2015). https://doi.org/10.1007/s11837-014-1287-2

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  • DOI: https://doi.org/10.1007/s11837-014-1287-2

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