SYNTHESIS AND UTILIZATION OF NEW EXTRACTANTS FOR NUCLEAR HYDROMETALLURGY

Recent progress in organic chemistry increases the possibility of cont rolling metal ions/organic molecules interaction. The use of macrocycl es or polypodands (1) makes possible the creation of specific extracta nts for each metal ion. According to the actual needs in pollution eli mination and precious metal recovery, this approach can lead to import ant renewals of extractants used in hydrometallurgy. In the present wo rk, selective extraction of plutonium by dicyclohexano-18-crown-6 (DCH 18C6) and paladium by thiapolypodands from high-level nuclear waste so lutions is investigated, and the results are modeled and discussed.