Laboratory-Scale Counter-Current Centrifugal Contactor Demonstration of an Innovative-SANEX Process Using a Water Soluble BTP

TS-BTPhen as a promising hydrophilic complexing agent for selective Am(III) separation by solvent extraction

“…TODGA extracts the 4f-and 5f-elements together with some non Ln fi ssion products (e.g. Sr, Ru, Pd) [9]. The distribution ratios of An(III) and Ln(III) using TODGA in TPH + 1-octanol increased with the nitric acid concentration following the classical behavior of neutral solvating extractants (Fig.…”

“…Recent developments within the ACSEPT project of the European Commission have focused on single cycle processes, recycling An(III) in a single process, e.g. the 1-cycle SANEX and innovative SANEX processes recently demonstrated at Forschungszentrum Jülich [8][9][10]. An even more complicated approach is the separation of americium alone in a single process.…”

“…In the innovative SANEX process the hydrophilic SO 3 -Ph-BTP (2,6-bis(5,6-di-(hydroxysulfonylphen-3-yl)-1,2,4--triazin-3-yl)-pyridine) was used to strip An(III) selectively from a loaded organic phase containing co-extracted An(III) and Ln(III) [13]. The stripping was possible using 0.35 mol/L nitric acid containing 0.018 mol/L SO 3 -Ph-BTP [9]. The prior co--extraction was carried out from solutions with high nitric acid concentrations.…”

Do An(iii) and Ln(iii) ions form heteroleptic complexes with diglycolamide and hydrophilic BT(B)P ligands in solvent extraction systems? A spectroscopic and DFT study

“…[14][15][16][17][18][19][20][21] The combination of co-extraction of An(III) and Ln(III) from the PUREX raffinate by using a lipophilic diglycolamide ligand TODGA (N,N,N 0 ,N 0 -tetra-n-octyl-diglycolamide, Scheme 2), followed by selective stripping of An(III) using a hydrophilic BTP, 2,6-bis(5,6di(3-sulphophenyl)-1,2,4-triazin-3-yl)pyridine, (SO 3 -Ph-BTP 4À , Scheme 1 top) dissolved in the aqueous phase, results in large separation factors of An(III) over Ln (III), which is the basis of various separation processes. [22][23][24][25][26] However, the experimental results related to the complexation of An(III) with these anionic N-donor ligands in the aqueous phase were rather difficult to interpret. Since Am(III) and Cm(III) prefer 9-fold coordination, 27,28 their coordination with three tridentate SO 3 -Ph-BTP 4À ligands was expected.…”

Solvent Extraction and Fluorescence Spectroscopic Investigation of the Selective Am(III) Complexation with TS-BTPhen

“…[11] After scrubbing some undesired co-extracted fission products, the An(III) are then selectively stripped using a water-soluble tetrasulfonated BTP (SO 3 Ph-BTP). [12][13][14] The remaining Ln(III) are then stripped using a buffer solution. The co-extraction and scrubbing steps of the innovative SANEX process were taken as the basis for this study.…”