Extraction Behavior of Metal Ions by TODGA, DOODA, MIDOA, and NTAamide Extractants from HNO₃ton-Dodecane

High-Performance Alkyl Diamide Amine and Water-soluble Diamide Ligand for Separating of Am(III) from Cm(III)

“…The highest SFAm/Cm value, as observed from this figure, is 41, which is one of the highest values reported to date. 10,15 This result confirms that ADAAM(EH) can preferentially extract Am(III) over Cm(III) from a 1.5 M HNO3 solution with an SFAm/Cm value of 5.5, and TEDGA better masks the harder Cm(III) better than Am(III). Therefore, the SFAm/Cm value is substantially improved, reaching a maximum value of 41, when this masking agent is used.…”

Highly Practical and Simple Ligand for Separation of Am(III) and Eu(III) from Highly Acidic Media

“…ADAAM(EH) is an extractant of the molecular organic ligand type for metal ions like tributylphosphate (TBP) and diglycolamide (DGA). [11][12][13] The mechanism of normal ion-pair extraction is expressed by the following equilibrium equation (Am:ADAAM(EH) = 1:1 complex):…”

Studies on the Extraction of Soft Acid Metal Species Using MIDOA and Analogous Compounds

“…IDOA and MIDEHA in Figure 1 -40 -has a strong extractability for lanthanides and actinides, which are hard acid metals [5][6]8]. It appears that the sulfur donor atom does not strongly complex with Re(VII).…”

“…The reason why there are few reports is due to the difficulty in their complex formation, inert metal ions, and negative charges after formation of the oxonium ions. Recently, a few N-donor extractants have been developed and confirmed to have high distribution ratio (D) values for Pd(II) and Tc(VII) [7][8]. These metals are soft-acid metals and are expected to react strongly with soft donor atoms, based on the HSAB principle [9].…”