N,N,N ',N '-Tetrabutyladipicamide as a new extractant in toluene of nitricacid and uranium(VI)

N,N,N',N'-Tetrabutyladipicamide (TBAA) was used for the extraction of nitri c acid and uranyl(II) ion from nitric acid media into toluene. The effects of nitric acid, uranyl(II) ion, and extractant concentration, temperature a nd back extraction on the distribution coefficient of uranyl(Ir) ion have b een studied. The main adduct of TBAA and HNO3 is TBAA . HNO3 in 1.0 mol/l n itric acid solution. The 1:2:2 complex of uranyl(II) ion, nitrate ion and T BAA as extracted species is further confirmed by IR spectra of the extracti on of uranyl(II) ion with TBAA. The values of the thermodynamic parameters have also been calculated.