Synergistic extraction of U(VI) and Th(IV) from nitric acid media with HBMPPT and TBP in toluene

YU Shaoning，

BAO Borong

Nuclear Science and Techniques

pp.125-128

Published in print 01 Mar 1999

44200

The synergistic extraction of U(VI) and Th(IV) from nitric acid solution by HBMPPT (4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione) and TBP (tributylphosphate ) in toluene was studied. The extraction ability of HBMPPT for U(VI) and Th(IV) was not so high, but when a little TBP was added in, the ability to extract U(VI) and Th(IV) was improved. The extracted complexes may be presented as UO₂NO₃·BMPPT·TBP and UO₂(BMPPT)₂·TBP for U(VI), and Th(NO₃)₃·BMPPT·TBP and Th(NO₃)₂ (BMPPT)₂·TBP for Th(IV), respectively, in the synergistic extraction system. The synergistic effect of HBMPPT and TBP makes the separation coefficient of U(VI) /Th(IV) or U(VI)/Eu(III) reach a high value.

U/Th separationSynergistic extraction

References

Smith B F, Jarvinen G D, Miller G.G et al. Solvent Extr Ion Exch, 1987, 5(5): 895~908

Ensor D D, Jarvinen G D, Smith B F. Solvent Extr Ion Exch, 1988, 6(3): 439~445.

Smith B F, Jarvinen G D, Jones M M et al. Solvent Extr Ion Exch, 1989, 7(5): 749~989.

Hannink N J, Hoffman D C, Smith B F. Solvent Extr Ion Exch, 1992, 10(3): 431~438

Jarvinen G D, Smith B F, Ritchey J M. Inorg Chim Acta, 1987, 129: 139~148.

Yu S N, Bao B R, Ma L et al. Nucl Sci Technol. 1998, 2

Yu S N, Yang Y Z, Bao B R et al. Nucl Chem & Radiochem (in Chinese), 1999, will be published.

Cheng Y D, Wang W J, Wang Z L et al. Nucl Fuel Chem. Nuclear Energy Publication Co.(in Chinese), 1985, 210~229.