[en] Sequential anion and cation exchange processes have been used for the final purification of ²⁴¹Am recovered during the reprocessing of aged plutonium metallurgical scrap. Plutonium was removed by absorption of Dowex 1, X-3.5 (30 to 50 mesh) anion exchange resin from 6.5 to 7.5 M HNO₃ feed solution. Following a water dilution to 0.75 to 1.0 M HNO₃, americium was absorbed on Dowex 50W, X-8 (50 to 100 mesh) cation exchange resion. Final purification was accomplished by elution of the absorbed band down 3 to 4 successive beds of the same resin, preloaded with Zn²⁺, with an NH₄OH buffered chelating agent. The recovery of mixed ²⁴¹Am-²⁴³Am from power reactor reprocessing waste has been demonstrated. Solvent extraction was used to recover a HNO₃ solution of mixed lanthanides and actinides from waste generated by the reprocessng of 13.5 tons of Shippingport Power Reactor blanket fuel. Sequential cation exchange band-displacement processes were then used to separate americium and curium from the lanthanides and then to separate approx. 60 g of ²⁴⁴Cm from 1000 g of mixed ²⁴¹Am-²⁴³Am