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Interaction of loparite concentrate with ammonium hydrodifluoride

  • Inorganic Synthesis and Industrial Inorganic Chemistry
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Abstract

Results obtained in a study of the interaction between the loparite concentrate and ammonium hydrodifluoride are reported. It was found that the reactions of the main components of the concentrate with NH4HF2 yield complex ammonium fluorometallates. It was shown that water leaching of the fluorinated product makes it possible to transfer niobium and tantalum into solution together with fluoroammonium salts of titanium and silicon and to concentrate rare-earth elements in the insoluble residue in the form of complex salts of general formula NaLnF4.

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Authors and Affiliations

  1. Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, pr. 100-letiya Vladivostoka, Vladivostok, 690022, Russia

    G. F. Krysenko, D. G. Epov, M. A. Medkov, E. B. Merkulov & S. I. Ivannikov

  2. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center, Russian Academy of Sciences, Apatity, Akademgorodok 26a, Apatity, 184209, Russia

    A. I. Nikolaev

Authors
  1. G. F. Krysenko
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  2. D. G. Epov
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  3. M. A. Medkov
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  4. E. B. Merkulov
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  5. S. I. Ivannikov
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  6. A. I. Nikolaev
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Corresponding author

Correspondence to G. F. Krysenko.

Additional information

Original Russian Text © G.F. Krysenko, D.G. Epov, M.A. Medkov, E.B. Merkulov, S.I. Ivannikova, A.I. Nikolaev, 2016, published in Zhurnal Prikladnoi Khimii, 2016, Vol. 89, No. 4, pp. 422−428.

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Krysenko, G.F., Epov, D.G., Medkov, M.A. et al. Interaction of loparite concentrate with ammonium hydrodifluoride. Russ J Appl Chem 89, 540–546 (2016). https://doi.org/10.1134/S1070427216040030

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  • DOI: https://doi.org/10.1134/S1070427216040030

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