Separation of tungsten and rhenium on alumina in dynamic condition

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 Q0.05, the capacities at C/C0 0.5, the total column sorption capacities Q0.9 and the utilization degrees or column efficiencies E, were determined. According to the obtained data the separation factors αW/Re = Qw/QRe were calculated. (author)