Synergistic extraction of uranyl beta-diketonates with some mono amides

The extraction behaviour of uranyl ion from dilute nitric acid medium employing l-phenyl-3-methyl-4-benzoyl-5- pyrazolone (HPMBP) / 2-thenoyl tri fluoro acetone (HTTR) and their mixture with several sterically modified monoamides viz. di-2-ethylhexyl acetamide (D2EHAA), di-2-ethylhexyl propanamide (D2EHPrA),-di-2-ethylhexyl isobutyramide (D2EHiBA) and di-2-ethylhexyl pivalamide (D2EHPvA) was investigated. The nature of the extracted species was determined by the slope analysis method. The extraction constant (log kex) for the binary species UO2(A)2 and the overall extraction constants (log K) for the ternary species UO2(A)2.B were calculated. (author)