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Technology of deep removal of impurities from scandium oxide with the acquisition of high-purity scandium oxide

  • Metallurgy of Rare and Noble Metals
  • Published:
Russian Journal of Non-Ferrous Metals Aims and scope Submit manuscript

Abstract

A new production process for processing off-grade scandium oxide (98%) and scandium oxides 99.0 and 99.9 and the removal of impurities from them with the acquisition of high-purity scandium oxide 99.99% is developed and tested. This process is based on various solubilities of scandium formates and elements of impurities; it involves the dissolution of starting (98–99.8%) Sc2O3 in HCl, the processing of the solution with NH4OH to pH = 5–7, filtering and washing the Sc(OH)3 precipitate with water, repulpation in formic acid, separating the precipitate of scandium formate from the mother liquor, washing scandium formate with formic acid, and drying and calcinating it with the acquisition of Sc2O3 of the OS-99.99 grade.

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Authors and Affiliations

  1. OOO Research and Production Environmental Firm EKO-Tekhnologiya, ul. Demeneva 7, Berezniki, Perm oblast, 618400, Russia

    Yu. P. Kudryavskii

  2. Berezniki Branch, Perm State Technical University (National Research University), ul. Tel’mana 7, Berezniki, Perm oblast, 618404, Russia

    Yu. P. Kudryavskii

Authors
  1. Yu. P. Kudryavskii
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Original Russian Text © Yu.P. Kudryavskii, 2011, published in Izvestiya VUZ. Tsvetnaya Metallurgiya, 2011, No. 5, pp. 24–26.

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Kudryavskii, Y.P. Technology of deep removal of impurities from scandium oxide with the acquisition of high-purity scandium oxide. Russ. J. Non-ferrous Metals 52, 420–422 (2011). https://doi.org/10.3103/S1067821211050063

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  • DOI: https://doi.org/10.3103/S1067821211050063

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