Actinides(iii)-lanthanides Group Separation from Nitric Acid Using New Aromatic Diorganyldithiophosphinic Acids
نویسندگان
چکیده
In this paper, extractants are presented which made it possible to separate actinides(III) and lanthanides from strong nitric acid solutions (0.05 1 mol/L). For this purpose, new aromatic dithiophosphinic acids were synthesised and characterised, and the distribution ratios of Am(III), Eu(III) and all relevant lanthanides were determined in batch extraction experiments. The extractant used was a mixture of aromatic dithiophosphinic acid + synergist in an aromatic solvent. In particular, the influence of the synergist and solvent is described. With the aid of a 12-step flowsheet it was also possible for the first time to continuously partition actinides/lanthanides at an acid concentration of 0.5 mol/L HNO3.
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