Cyanex301和Cyanex302对镅和稀土元素的萃取研究  

STUDY ON THE EXTRACTION OF AMERICIUM AND SOME LANTHANIDES BY CYANEX 301 AND CYANEX 302

作　　者：刘德敏[1] 邵芸[1] 刘翔峰[1] 杨裕生[1] 

机构地区：[1]西北核技术研究所

出　　处：《核化学与放射化学》1997年第4期18-22,共5页Journal of Nuclear and Radiochemistry

摘　　要：用二烷基一硫代膦酸（Ｃｙａｎｅｘ３０２）和二烷基二硫代膦酸（Ｃｙａｎｅｘ３０１）作萃取剂，环己烷作稀释剂，研究了它们对示踪量镅和铕的萃取行为及在常量镧存在时，Ｃｙａｎｅｘ３０１对镅、镧、铕和铥的萃取。结果表明，Ｃｙａｎｅｘ３０１和Ｃｙａｎｅｘ３０２萃取示踪量镅和铕时，镅与铕的萃取行为极其相似，但有常量稀土存在时，Ｃｙａｎｅｘ３０１对镅有明显的选择性，镅与铕的分离因数接近２００；稀土元素的萃取顺序为：ＤＴｍ＞ＤＥｕ＞ＤＬａ。The solvent extraction of Am 3+ 、La 3+ 、Eu 3+ and Tm 3+ by Cyanex 301 (bis(2,4,4 trimethylpentyl)dithiophosphinic acid) and Cyanex 302 (bis(2,4,4 tri methylpentyl)monothiophosphinic acid) in cyclohexane from natrate aqueous solution has been investigated.The results show that the extraction behaviors of trace amount of Am 3+ and Eu 3+ by Cyanex 301 or Cyanex 302 are very similar.However,in the presence of macro amount of La(NO 3) 3,the high selectivity towards Am 3+ is rather apparent.The separation factor for Am 3+ and Eu 3+ is as high as 200,and the order of distribution coefficient for rare earth elements is: D Tm > D Eu > D La .

关 键 词：镅 稀土 Cyanex301 Cyanex302 萃取 

分 类 号：O614.354[理学—无机化学] O614.33[理学—化学]