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《cyanex923與酸性膦酸萃取劑協(xié)同萃取ce、f性能研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫(kù)。
1、遼寧石油化工大學(xué)畢業(yè)設(shè)計(jì)（論文）用紙Cyanex923與酸性膦酸萃取劑協(xié)同萃取Ce、F性能研究XXX（遼寧石油化工大學(xué)xxxxxxxxxxxxxxxxx班xxxxx）摘要協(xié)同萃取就是在兩種或兩種以上萃取劑組成的多元素萃取體系中，金屬離子的萃取分配比D協(xié)顯著大于每一萃取劑在相同條件下單獨(dú)使用時(shí)的分配比之和D加合，即認(rèn)為這一萃取體系有協(xié)同效應(yīng)。與此相反，若D協(xié)小于D加合則為反協(xié)同，如兩值相等，則無(wú)協(xié)同。本文主要研究了中性萃取劑三烷基氧膦（Cyanex923）與酸性膦酸萃取劑二（2,4,4-三甲基）膦酸（P204）協(xié)同萃取Ce和F的性能。具體內(nèi)容如下
2、：（1）考察了Cyanex923與P204單獨(dú)體系對(duì)Ce(IV)、Ce(III)、F(I)及Ce(IV)-F混液的萃取。確定體系中各離子是否可被Cyanex923和P204萃取。（2）研究了Cyanex923與P204混合體系對(duì)Ce(IV)、F(I)、Ce(III)及Ce(IV)-F混液的協(xié)同萃取性能。確定該混合體系各離子是否存在協(xié)同萃取效應(yīng)。計(jì)算了萃取Ce(IV)的協(xié)同增長(zhǎng)因子。用斜率法確定了Cyanex923與P204確定兩種萃取劑有最大協(xié)萃效應(yīng)時(shí)的分配比，并探討萃取機(jī)理。（3）考察了溫度對(duì)Cyanex923與P204混合體系萃取Ce(IV
3、)的影響，計(jì)算Ce(IV)萃取的熱力學(xué)常數(shù)。關(guān)鍵詞：Cyanex923，協(xié)同萃取，Ce，F(xiàn)Researhonthecharactersofceriumand33遼寧石油化工大學(xué)畢業(yè)設(shè)計(jì)（論文）用紙fluorinesynergisticextractionwithCyanex923andorganophosphoricacidsextractantGuoHongfeiClass0602,EnvironmentalScience,SchoolofEnvironmentalandBiologicalEngineering,LiaoningShihua
4、University,LiaoningFushun,113001AbstractSynergisticextractionmeansthattheextractiondistributionratioDsynergisticinthemultielementsystemscomposedbytwoormoreextractantismuchmorethanthatofDadductwithsingleextractantusinginthesamecondition.Namelytheextractantsystemisregardedtoha
5、vesynergisticeffect.Onthecontrary,thesystemwasregardtohaveanti-synergisticeffect,ifDsynergisticissmallerthatDadductandnosynergisticeffectwhentheyareequal.ThesynergisticextractionofCeandFwithaneutralextractantnamedthreealkylatedphosphineoxide(Cyanex923)andakindoforganophospho
6、ricacidextractantnamedbi-(2,4,4-trimethyl)phosphinicacid(P204)hasbeeninvestigated.Thefollowingaspectswereincludedinthethesis:(1)TheextractionofCe(IV),Ce(III),F(I)andCe(IV)-FmixedsolutionwithCyanex923andP204alonewasstudiedtodeterminewhethertheionscouldbeextractedbyCyanex923an
7、dP204ornot.(2)ThesynergisticcharactersofCe(IV),Ce(III),F(I)andCe(IV)-FmixedsolutionwithmixtureofCyanex923andP204wasinvestigatedtomakesuretheionswithsynergisticextraction.Thesynergistic33遼寧石油化工大學(xué)畢業(yè)設(shè)計(jì)（論文）用紙increasingfactorswerecalculated.Thedistributionratiointhemaximumsynergi
8、sticefficiencyofthetwoextractantwasobtainedbyslopeanalysisandtheextractionm
