Separation of tungsten and rhenium on alumina in dynamic conditions
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The separation of tungstate and perrhenate anions on alumina from aqueous solutions of sodium chloride was investigated in dynamic conditions. The breakthrough curves for W and Re as the function of the ratio of their concentrations in the solution, were determined. The flow rate (3 ml/min), pH 2 and NaCl concentration (0.15 mol/l) were kept constant throughout the experiments. The breakthrough capacities Q(0.05), the capacities at C/C-0 = 0.5, the total column sorption capacities Q(0.9) and the utilization degrees or column efficiencies E, were determined. According to the obtained data the separation factors alpha(W/Re) = Q(w)/Q(Re) were calculated.