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Studies on precipitation and co-precipitation of tantalum and niobium from potassium fluoride solutions

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Summary

Precipitation and co-precipitation of tantalum and niobium from KF solution were investigated under various experimental conditions. Results obtained indicate that variations of HF concentration do not influence the K2TaF7 precipitation yield, but variations in KF concentration do. Niobium co-precipitation is mainly due to adsorption onto the surface of the solid phase. Chemical composition of the potassium tantalum fluoride was checked by neutron-activation analysis.

Zusammenfassung

Die Fällung und Mitfällung von Tantal und Niob aus Kaliumfluorid-lösungen wurde unter verschiedenen Versuchsbedingungen untersucht. Veränderungen der Flußsäurekonzentration beeinflussen die Fällungsausbeute an K2TaF7 zwar nicht, im Gegensatz dazu aber wird diese Ausbeute durch Veränderungen der Kaliumfluoridkonzentration beeinflußt. Die Niob-Mitfällung erfolgt hauptsächlich auf Grund der Adsorption an der Oberfläche der festen Phase. Die chemische Zusammensetzung des Kaliumtantalfluorids wurde durch Neutronenaktivierungsanalyse überprüft.

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Authors and Affiliations

  1. Institute “Rudjer Bošković”, Zagreb, Yugoslavia

    M. J. Herak, M. Dikšić & P. Strohal

Authors
  1. M. J. Herak
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  2. M. Dikšić
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  3. P. Strohal
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Herak, M.J., Dikšić, M. & Strohal, P. Studies on precipitation and co-precipitation of tantalum and niobium from potassium fluoride solutions. Mikrochim Acta 59, 116–120 (1971). https://doi.org/10.1007/BF01216891

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  • DOI: https://doi.org/10.1007/BF01216891

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