Extraction of Actinides with Different 6,6′‐Bis(5,6‐Dialkyl‐[1,2,4]‐Triazin‐3‐yl)‐[2,2′]‐Bipyridines (BTBPs)

Abstract

The extraction of Am(III), Th(IV), Np(V), and U(VI) from nitric acid by 6,6 0 -bis(5,6-dialkyl-[1,2,4]-triazin-3-yl)-[2,2 0 ]-bipyridines (C2-, C4-, C5-, and CyMe 4 -BTBP) was studied. Since only americium and neptunium extraction was dependent on the BTBP concentration, computational chemistry was used to explain this behavior. It has been shown that the coordination of the metal played an important role in forming an extractable complex into the organic phase, thus making it possible to extract pentavalent and trivalent elements from tetravalent and hexavalent elements. This is very important, especially because it shows other possible utilizations of a group of molecules meant

A TRLFS Study on the Complexation of CmIII and EuIII with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

“…Of these, hydrophobic bis(triazinyl)pyridines (BTP) [6] and bis(triazinyl)bipyridines (BTBP) [7][8][9] are the most promising candidates. However, none of them fulfil all criteria for application in an industrial process, hence requiring optimisation.…”

On the Basic Extraction Properties of a Phenyl Trifluoromethyl Sulfone-Based GANEX System Containing CyMe4-BTBP and TBP

“…This enables the utilization of the specific properties of both extracting agents. The chosen ligands are 6,6ʹ-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo [1,2,4] triazin-3-yl) [2,2ʹ]bipyridine (CyMe 4 -BTBP), [18,19] designed to extract tri-butyl and pentavalent actinides without extracting trivalent lanthanides, [20] and tri-butyl phosphate (TBP) (Figure 1), which is mainly for extracting tetra-and hexavalent actinides. [21] Combining these two extracting agents enables the necessity of redox control to be avoided, and it is possible to strip the actinides selectively or to reuse them directly in a homogeneous recycling.…”

Development of Highly Selective Ligands for Separations of Actinides from Lanthanides in the Nuclear Fuel Cycle

“…100 The extraction of Am(III), Th(IV), Np(V), and U(VI) by a range of BTBP ligands has been investigated to determine the effect of the oxidation state of the actinide ions on their extraction. 102 It was found that the extraction increased in the order Am(III) < Th(IV) < Np(V) < U(VI) at low BTBP concentrations, but increased in the order Th(IV) < U(VI) < Np(V) < Am(III) at high BTBP concentrations. This study suggests that the tri-and pentavalent actinides can be separated from the tetra-and hexavalent actinides using the BTBPs.…”