2-羟基-5-烷基苯乙肟萃取Am~(3+)和镧系元素的研究Ⅰ.萃取条件的确定
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摘要: 研究了2-羟基-5-烷基苯乙肟(商品代号7804)萃取Am ̄(3+)和镧系元素时,平衡时间、温度、pH值、萃取剂浓度及料液中起始Am ̄(3+)和镧系元素浓度对各元素分配比的影响。研究结果表明,合适的萃取条件为:平衡时间30min、温度20±1°C、萃取剂浓度0.2mol/l、pH4.8—5.1。在此条件下,7804与Am ̄(3+)或镧系元素形成2:1配合物。7804萃取Am ̄(3+)及镧系元素的顺序为:Am>Eu>Sm>Nd>Pr>Ce>La。
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关键词:
- Am ̄(3+) /
- 镧系元素 /
- 萃取 /
- 2-羟基-5-烷基苯乙肟
Abstract: STUDIES OF THE EXTRACTION BEHAVIOR OF Am~(3+) AND LANTHANIDES WITH 7804 EXTRACTANT 1.STUDIES ON EXTRACTION CONDITIONSHOU RUIQIN(Northwest lnstitute of Nuclear Technology,Xi’an,710024)JIAO RONGZHOU ; ZHU YONGJUN(Institute of Nuclear Energy Technology,Tsinghua University,Beijing,100084)ABSTRACT The extraction behavior of Am~(3+) and lanthanides from nitrate solution using β-oxime extrac-tant, 7804,is studied.Distribution ratios are examined as a function of contact time,concentrationof extractant,pH and extraction temperature. The suitable extraction conditions are as follows :equilibrium time,30min;temperature,20土1℃;extractant concentration,0.2mol/l,pH,4.8—5.1.Under these experimental conditions,7804 forms 2 :1 complex with Am~(3+) or lanthanides.The extractability sequence is in the order of Am>Eu>Sm>Nd>Pr>Ce>La Key words Americium Lanthanides Extraction 2-hydroxy-5-alkyl-acetophenone oxime(7804) -
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