【摘要】 <正> 在前报中,我们研究了三甘酰双（二苯胺）及四甘酰双（二苯胺）对裂变产物的萃取,发现它们的硝基苯溶液能从含苦味酸的水溶液中很好地萃取稀土和碱土元素,且前者的分离效果优于后者。本文进一步探索以三甘酰双胺为骨架,以含苯环的不同取代基组成的五种链状聚醚对轻稀土的萃取性能。酰胺的—NH₂分别被五种取代基所取代:二苯胺基、苄苯胺基、二苄胺基、二（对辛基苯）胺基和吩噻嗪基。更多还原

【Abstract】 The extraction of light rare earths from aqueous solution containing pirc acid with nitrobenzene solution of five derivatives of glycol-O,O’-diacetamide has been studied. The distribution ratio decreases when the temperature rises. With twoxtractants containing benzyl group, the distribution ratios of Ce(Ⅲ) are the highest in the extraction of light rare earths; there is a strictly reverse order for the other three phenyl substitution derivatives. Among the five extractants, N, N, N’,N’-tetraphenyl-3,6 dioxaoctanedioic diamide has the largest separation factor for light rare earths. The effects of concentration of exfractants, pH and concentration of picric acid in aqueous phase on the extraction were investigated.更多还原