Effect of diluent on the extraction of europium(iii) and americium(iii) with N,N,N′,N′-tetraoctyl diglycolamide (TODGA)

Abstract

Solvent extraction of Eu3+ and Am3+via N,N,N′,N'-tetraoctyl diglycolamide (TODGA) dissolved in different molecular diluents was studied.

Aggregation Behavior of Nitrilotriacetamide (NTAmide) Ligands in Thorium(IV) Extraction from Acidic Medium: Small-Angle Neutron Scattering, Fourier Transform Infrared, and Theoretical Studies

“…Moreover, Huang et al have also reported 1:1 complex for the extraction of trivalent ions in kerosene, whereas Bhattacharyya et al, reported the formation of the 1:2 complex for the same ligand in the 20% isodecanol + 80% n -dodecane system . The effect of diluents on the stoichiometry of the extracted species for trivalent ion extraction by TODGA is also reported …”

“…30 The effect of diluents on the stoichiometry of the extracted species for trivalent ion extraction by TODGA is also reported. 67 The TP formation is undesirable phenomenon in the extraction of tetravalent metal ions, and hence, the solvent extraction conditions are generally optimized to prevent it. It is always better to have a solvent system which can dissolve the maximum amount of metal ions at the desired acidity without any TP formation.…”

A multi-faceted approach to probe organic phase composition in TODGA systems with 1-alcohol phase modifiers

“…As a result, the role of 1-alcohols in these systems has been attributed to solvation of the Ln-DGA complex through interactions with the outer-sphere hydrogen bonding network. 3,25…”

“…Lanthanides (Lns), which make up the 4f period, exhibit unique electronic properties that make them of interest for many applicationsincluding digital technology, catalytic converters, phosphors, lasers, permanent magnets, and ceramics. [1][2][3] With the vast array of applications comes the need for an abundance of Lns; however, the current worldwide shortage of Lns creates a supply-demand risk, where industrial product cannot meet the demand. 1 Currently, trivalent Lns are recovered from ores through a hydrometallurgical process involving the dissolution of the ore in high concentrations of acid, where the Lns are recovered and separated via solvent extraction.…”

“…As a result, the role of 1-alcohols in these systems has been attributed to solvation of the Ln-DGA complex through interactions with the outer-sphere hydrogen bonding network. 3,25 In the current literature only select Lns are chosen for additional characterization methods. Techniques in addition to solvent extraction should be used across the entire 4f period aiming to highlight a relationship between organic phase bulk properties and the distribution ratios.…”