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Separation of Scandium by Phosphinic Acid Extractant from Sulfuric Acid Solution

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Rare Metal Technology 2022

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

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Abstract

The main challenge for scandium extraction from bauxite residue by hydrometallurgy is the separation step. After sulfuric acid leaching, the solvent extraction process is required for a high separation degree. The presence of contaminants such as iron and aluminum in a concentration 1000 times higher than scandium is a problem to be overcome. The present study aims at the separation of scandium from the sulfuric acid solution using Cyanex 923 in kerosene. First, zirconium was removed using Aliquat 336. Then, Cyanex 923 was used to remove scandium over impurities, such as iron, aluminum, and titanium. Results have demonstrated that the pH does not affect scandium separation, while temperature, organic extractant concentration, and TBP affect the separation. Experiments were carried out for 15 min under magnetic stirring, and samples were analyzed in EDXRF and ICP-OES.

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Acknowledgements

The authors acknowledge the University of Sao Paulo for supporting this project and Sao Paulo Research Foundation and Capes (FAPESP—process number: 2012/51871-9, 2018/03483-6, 2018/11417-3, and 2019/11866-5) for the financial support.

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Authors and Affiliations

  1. Department of Chemical Engineering, Polytechnic School of University of São Paulo, São Paulo, Brazil

    Amilton Barbosa Botelho Junior, Denise Crocce Romano Espinosa & Jorge Alberto Soares Tenório

Authors
  1. Amilton Barbosa Botelho Junior
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  2. Denise Crocce Romano Espinosa
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  3. Jorge Alberto Soares Tenório
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Corresponding author

Correspondence to Amilton Barbosa Botelho Junior .

Editor information

Editors and Affiliations

  1. University of Tokyo, Tokyo, Japan

    Takanari Ouchi

  2. University of Toronto, Toronto, ON, Canada

    Gisele Azimi

  3. KTH Royal Institute of Technology, Stockholm, Sweden

    Kerstin Forsberg

  4. Pennsylvania State University, University Park, PA, USA

    Hojong Kim

  5. University of Saskatchewan, Saskatoon, SK, Canada

    Shafiq Alam

  6. IND LLC, South Jordan, UT, USA

    Neale R. Neelameggham

  7. University of Ilorin, Ilorin, Nigeria

    Alafara Abdullahi Baba

  8. University of Queensland, Brisbane, QLD, Australia

    Hong Peng

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Botelho Junior, A.B., Espinosa, D.C.R., Tenório, J.A.S. (2022). Separation of Scandium by Phosphinic Acid Extractant from Sulfuric Acid Solution. In: Ouchi, T., et al. Rare Metal Technology 2022. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-92662-5_7

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