Counter-current extraction of uranium and lanthanides from simulated high-level waste using N,N,N′,N′-tetraoctyl diglycolamide

Dynamic light scattering study on the aggregation behaviour of N,N,N′,N′-tetraoctyl diglycolamide (TODGA) and its correlation with the extraction behaviour of metal ions

“…Amongst the long chain derivatives of diglycolamides, N,N,N 0 ,N 0 -tetraoctyl diglycolamide (TODGA) was found to be the most promising extractant for actinide partitioning and has been extensively studied in our laboratory as well as elsewhere [4][5][6][7][8][9][10][11]. However, the studies of metal-TODGA complexes in the organic solvents show unusual interesting features that are difficult to reconcile within the framework of the traditional coordination chemistry interpretations.…”

Facilitated transport of uranium(VI) across supported liquid membranes containing T2EHDGA as the carrier extractant

“…(5), an increase in the T2EHDGA concentration can cause an increase in the distribution coefficient leading to an increase in the transport rates. The effect of T2EHDGA concentration on the transport rate of U was investigated using 3 M HNO 3 as the feed and 0.01 M HNO 3 as the strippant in the receiver phase.…”

“…N,N,N ,N -Tetraoctyl-3-pentane-diamide (TODGA) is extensively used in solvent extraction [3][4][5], extraction chromatography [6] and liquid membrane [7,8] techniques and has been found to be an efficient extractant, showing rather unique feature of extracting bivalent, trivalent, tetravalent and hexavalent metal ions with equal ease [9]. On the other hand, the branched analog, N,N,N ,Ntetra-2-ethylhexyl-3-pentane-diamide (T2EHDGA) shows higher selectivity though with lower extraction efficiency [10].…”

Extraction of samarium and gadolinium from aqueous nitrate solution with D2EHPA in a pulsed disc and doughnut column

“…The recovery of Dy with 98% purity and Y with 93% purity from rare earth chloride solution with mixer-settlers in 20 stages has been reported [8]. Ansari and co-workers employed the mixer-settler unit in 16 stages for extraction of uranium and lanthanides from simulated high-level waste [9].…”