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