THE NOVEL EXTRACTANTS, DIGLYCOLAMIDES, FOR THE EXTRACTION OF LANTHANIDES AND ACTINIDES IN HNO₃–n-DODECANE SYSTEM

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).…”

“…Although several extractants, like diglycolamides, malonamides and carbamoylmethyl phosphine oxides, have been developed for the recovery of actinides [1][2][3][4][5][6], information on novel extractants to extract the platinum metal group and oxonium ions is rarely reported. 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.…”

Advanced Extraction Methods for Actinide/Lanthanide Separations

“…A similar trend has been noted in simple diglycolamides. 56 In four different diluents: chloroform, toluene, n-hexane and n-dodecane, the distribution coefficients of the ligands decreased when the length of the alkyl chains was extended. In previous work with Calix [4]arenes and triphenoxymethane molecule appended with CMPO arms, the extraction efficiency of the constructs was amplified by the increased flexibility of the linker between the CMPO and the base skeleton.…”

Reprocessability of molybdenum and magnesia based inert matrix fuels

“…N,N-dimethyl-N,N-dioctylhexylethoxymalonamide (DMDOHEMA) has become the reference molecule for the DIAMEX processs [13,14] enhancing the extractive properties towards trivalent elements and shortening the degradation compounds formed by acidic hydrolysis and radiolysis [15]. Recently, a new process for recovery of trivalent actinides from PUREX-type raffinate utilizing N,N,N,N--tetraoctyldiglycolamide (TODGA) was developed [16][17][18][19][20][21][22]. In a fi rst step a very effi cient extraction of An(III) and Ln(III) from acidic medium is performed, followed by their stripping using diluted nitric acid [19].…”