RadiochemistryandNuclearChemistry1SelectiveExtractionofAmericiumOverLanthanidesFromNitricAcidbyDPTPTANGHong-bin,CHENGQi-fu,YEGuo-an,YEYu-xing,激ANGDe-xiang,ZHUWen-bin,CHENHui2,6-bis(5,6-di-n-propyl-l,2,4-triazin-3-yl)-pyridinc(DPTP)wassynthesizedbyusinganimprovedmethod・ConsideringthegoodsolubilityofDPTPandavoiding3th-phaseformation,30%octanol-dodecane(ODOD)wasselectedasdiluent.ThedistributionratiosofAm(III)andEu(III)werestudiedasafunctionofanumberofparameterssuchascontacttime,nitrateionandthenitricacidconcentrationsinaqueousphase,theconcentrationofDPTPintheorganicphase・Theresultsshowthat5minarcenoughtoreachtheextractionequilibriumforAm(III)andEu(III),valuesincreaseobviouslywithincreasingaqueousnitricacidconcentration,buttheseparationfactor,SFAtn.EU，arenearlyconstantintherangeof100-120forthissystem.ThedistributionradiosofLa,Ce,Nd,Sm,Gdweremeasuredtobe10“for0.02mol/LDPTP/ODOD.RadiationstabilityofDPTPwasstudied,andtheresultsshowthatDMwaskeptfixedwhentheradiationdoseisGy,anddecreasedobviouslywhentheradiationdoseisover5xl04Gy.Theamericiumcanbere-extractedeffectivelyfromorganicphaseby0.01mol/LHNO3.2StudyonExtractionBehaviorofAm(IH)andLn(III)WithiPr-BTPCHENGQi-fu,TANGHong-bin,激ANGDe-xiang,YEGuo-an,YEYu-xing,ZHUZhi-xuanByusing30%octanol/〃-dodccancasdiluent,theextractionbehaviorofAm(III)andlanthanidcs(III)fromnitricacidsolutionwasstudiedwith2,6-bis-(5,6・di-i・propyl-l,2,4-triazin-3-yl)-pyridine(iPr-BTP).Theeffectofsomeparameters,suchastheconcentrationofnitricacid,theconcentrationofiPr-BTP,diluentcomposition,ionicstrengthandthecontacttimeonthedistributionratioofAm(III)andlanthanides(in)isalsoinvestigated.TheresultsshowthattheextractionequilibriumofAmisreachedwithin5min,howeverthekineticsoftheextractionofEuisslower,sinceequilibriumisonlyreachedafter15min.WhentheconcentrationofHNO3isintherangeof0.2-1.0mol/L,thedistributionofAm(III)andlanthanides(III)isnearlyconstant.Inaddition,thecompositionoftheextractioncomplexesandtheextractionreactionequationareexamined,anditisfoundthattheextractionreactionequationmaybeexpressedasfollows：M3++3NO；+3(iPr-BTP)oM(NO3)3«3(iPr-BTP)oFinally,aconclusionisdrawnthatthecapabilityofextractingAmbyiPr-BTPismorethanthatofextractingEu,andtheAm/Euseparationfactor(SFAtn/Eu)is300at25°C,0.5mol/LHNO3.---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---3StudyonSeparationofAmericiumFromEuropiuminNitricAcidbyDPTPinOctanol-DodecaneTANGHong-bin,CHENGQi-fu,YEGuo-an,YEYu-xing,激ANGDe-xiang,ZHANGHuAccordingtoourpreviousexperimentresults,0.02mol/LDPTP/30%octanol-dodecane(ODOD)wasselectedastheorganicphasetoseparateamericiumfromeuropiumin1.0mol/LHNO3.After4stagescross-flowextraction,therecoveryofAmis91.04%,only2.93%EufollowswithAmintheorganicsolvent・InordertoincreasetherecoveryofAm,acounter-currentcascade(10mLglasstubewithplug)extractionexperimentwascarriedoutwith0.04mol/LDPTP/ODOD・Inthisexperiments,theflowrateratioisasfollow：X：F：S=2.5：4：1,BF：BX=1：1；thefeedsolutionisEu(III)+1.0mol/LHNO3,senibbingsolutionis1.0mol/LHNO3,strippingreagentis0.01mol/LHNO3.TheresultsshowthatintheextractionsectiontherecoveryofAmis98.42%,onlycontaining<0.9%Euintheorganicsolvent,andthestrippingefficiencyofAmandEuis99.9%,99%,respectively.Thetotalseparationfactorisover104.4StudyonReactionKineticsofNitrousAcidWithAcetohydroxamicAcidinHNO3MediumZHENGWci-fa...