Separation of trivalent actinides from lanthanides by impregnated resin with new N,N'-dialkyl-N,N'-diphenylpyridine-2,6-dicarboxyamides

Watanabe, Masayuki   ; Arisaka, Makoto ; Kimura, Takaumi 

N,N'-dimethyl-N,N'-diphenylpyridine-2,6-dicarboxyamide which contains a pyridyl group between two amidic functional groups exhibited moderate separation ability of actinides(III) from lanthanides(III) at high HNO concentration by solvent extraction. To solve the leakage problem on the extraction chromatography, we reported that newly synthesized N,N'-dialkyl-N,N'-diphenylpyridine-2,6-dicarboxyamides (R-PDA; R = butyl, octyl, decyl, dodecyl) exhibited reduction on the leakage of extractant from the impregnated resin depending on the length of alkyl group. The column chromatography of actinides(III) from lanthanides (III) was investigated by using the impregnated resin with Oct-PDA.