【摘要】 甲基异丁基酮（MIBK）兼有溶剂及中性萃取剂的加合作用,作为溶剂能提高硝酸季铵萃取铕（Ⅲ）、钆（Ⅲ）的分离效果。水相中的盐析剂对分离因数影响较大,在1M 的 Mg（NO₂）₂介质中,铕（Ⅲ）与钆（Ⅲ）问的分离因数可达1.90。MIBK 溶剂体系克服了芳烃熔剂有毒的缺点,消除了季铵盐在烷烃溶剂中易乳化的现象,可获得比中性磷型加合剂更佳的分离效果。更多还原

【Abstract】 The separation of europium（Ⅲ）and gadolini-um（Ⅲ）on extraction with quaternary ammoniumnitrate is increased by the application of methyl-isobutyl ketone as solvent due to its neutral sol-eating effect The separation coefficient,areinfluenced considerably by the concentration ofnitrates in the aqueous phase.A 1.9 separationcoefficient between Eu（Ⅲ）and Gd（Ⅲ）is attainedin 1M Mg（NO₃）,solution By the applicationof MIBK as solvent the health injury inextraction by aromatic solvents is reduced andthe emulsification and homogenization of qua-ternary ammonium nitrate in alkyl solvents disap-pear while separation coefficients are better thanthose using a neutral phosphorous soivatingagent更多还原