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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 H2SO4≤5M and of HCl≤4M. The most interesting separation possibilities have been tested under dynamic conditions.
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