Distribution of technetium in PUREX process streams

1,10-Phenantroline complex of iron(II) nitrate: the challenging salt for the technetium precipitation from nitric acid solutions

“…processes technetium, partly distributes along the streams of U, Pu, Np, Zr [1][2][3][4][5]. The presence of technetium in the streams of actinides affects their purity and thus the extra refining stages are required.…”

Syntheses and crystal structures of Eu(III) and Sm(III) perrhenate complexes with 2,2′-(imino)bis(N,N′-diethylacetamide)

“…Hence, a lot of studies have been devoted for the development of extractants with high selectivity to TcO 4 − [6][7][8][9][10][11][12][13]. In such studies, properties of many complexes of TcO 4 − with actinide ions have been examined [11][12][13].…”

Chemical behavior of neptunium in the presence of technetium in nitric acid media

“…It meant that when there was no reductant in the system, Tc(IV) was oxidized to Tc(VI) and Tc(VII). Therefore, the oxidation of Np(IV) might be attributed to the oxidants such as HNO 3 , and Tc(VI), Tc(VII) because Tc(V) was unstable [7]. To find the reasons that caused the oxidation of Np(IV), the investigations given below were carried out.…”

“…Previous investigations have indicated that the redox behavior of Np was affected obviously by Tc(VII) in the U(IV)-N 2 H 4 -Np(V) system [6][7][8][9][10], and Tc(VII) was also reduced to lower oxidation states by U(IV) and hydrazine. Specifically, Np(V) was reduced to Np(IV) quickly and then Np(IV) re-oxidized to Np(V) entirely [9].…”