PMCBP与中性萃取剂对铕的协同萃取

    • 摘要: 研究了1-苯基-3-甲基-4-(2′-氯苯甲酰基)吡唑酮-5(PMCBP)与三辛基氧化膦(TOPO)、二正辛基亚砜(DOSO)、二环己基亚砜(DCyHSO)和磷酸三丁酯(TBP)的二甲苯溶液从盐酸介质中对铕的协同萃取,实验证实有明显的协萃效应。采用斜率法测定了PMCBP单独和协萃铕的配合物组成,它们分别为EuA2·Cl·HA和EuA2·Cl·B(B为TOPO、DOSO、DCyHSO、TBP)。计算了它们的萃取平衡常数,讨论了协萃机理。

       

      Abstract: ASTUDYONTHESYNERGISTICEXTRACTIONOFEUROPIUMWITHPMCBPANDNEUTRALEXTRACTANTSZhouMeicunSunXiaoyuMaoJiajun(DepartmentofChemistry,TongjiUniversity,Shanghai,200092)ABSTRACTAstudyonthesynergisticextractionofeuropium(Ⅲ)fromhydrochloricacidsolutionwithchelatingagents,1-phenyl-3-methyl-4-(2′-chlorobenzoyl)-pyrazolone-5(PMCBP),plustheneutralextractants,trioctylphosphineoxide(TOPO),dioctylsulfoxide(DOSO),dicyclo-hexylsulfoxide(DCyHSO)andtributylphosphate(TBP),inxylenehasbeendescribed.Somesynergisticefectshavebeenobserved.TheexperimentalresultssuggestthatthecompositionofsynergisticcomplexspeciesisEu(PMCBP)2·Cl·B,(whereB=neutralextractants).SynergisticextractionpoweroftheneutralextractantsincreasesintheorderofTOPO>DOSO>DCyHSO>TBP.Theequilibriumconstantsforthesesynergisticextractionhavebeencalculatedandthemechanismofthesynergisticextractionisdiscussedaswel.KeywordsEuropiumPMCBPNeutralextractantSynergisticextraction

       

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