Distribution of niobium and tantalum on Dowex-1 and polyurethane foam in HF−H2SO4 and HF−HCl medium

R. Caletka; R. Hausbeck; V. Krivan

doi:10.1007/bf02060599

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 131: Issue 2

Distribution of niobium and tantalum on Dowex-1 and polyurethane foam in HF−H₂SO₄ and HF−HCl medium

Authors: R. Caletka¹, R. Hausbeck¹, and V. Krivan¹

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¹ Universität Ulm Sektion Analytik und Höchstreinigung Oberer Eselsberg, N 26 D-7900 Ulm/Donau (FRG)

DOI:: https://doi.org/10.1007/bf02060599

Page Count:: 343–352

Publication Date:: 17 Jun 1989

Online Publication Date:: 14 Aug 2005

Article Category:: Research Article

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Abstract

The sorption of niobium and tantalum on Dowex-1 and open-cell polyurethane foam polyether-type in HF–H₂SO₄ and HF–HCl medium has been investigated. The mechanism of the sorption as well as the composition of adsorbable complexes is discussed. A selective adsorption of tantalum was achieved from solutions, in which the concentration range of HF was 0.05–2M, of H₂SO₄5M and of HCl4M. The most interesting separation possibilities have been tested under dynamic conditions.