CMPO修饰杯［4］芳烃对三价An/Ln离子的萃取分离性能

杨亮; 刘俊; 羊衍秋; 方玉宇; 白冰; 冯文; 袁立华; 罗顺忠

doi:10.7538/hhx.2014.36.05.0289

CMPO修饰杯［4］芳烃对三价An/Ln离子的萃取分离性能

Extraction and Separation Properties of CMPO-Modified Calix［4］arenes Towards Actinide(Ⅲ) and Lanthanide(Ⅲ) Ions

摘要

摘要: 对正辛基苯基-N，N′-二异丁基胺甲酰甲基氧化膦（CMPO）是一种对镧系和锕系金属离子具有很好萃取效率的萃取剂。本工作以两种CMPO修饰杯［4］芳烃分子a（上缘）和b（下缘）为主体，考察了其对三价¹⁵²Eu和²⁴¹Am核素离子的萃取分离性能，并对溶剂、酸度、盐析剂和时间等影响因素进行了研究。结果表明：化合物a具有较好的²⁴¹Am萃取分离选择性，而正十二烷+正辛醇（体积比1∶1）为较合适的萃取溶剂，同时在c(H⁺)为1~2 mol/L、萃取时间为10 min、c(NaNO₃)<4 mol/L的条件下，萃取剂达到最佳²⁴¹Am/¹⁵²Eu分离性能。

Abstract: Carbamoylmethylphosphine oxide(CMPO) is very efficient in chelating cations of actinides and lanthanides. In the present paper, 2 CMPO modified calix［4］arenes a（at the upper rim） and b（at the lower rim） were investigated for the extraction properties towards actinide ²⁴¹Am（Ⅲ） and lanthanide ¹⁵²Eu（Ⅲ）. In addition, the influence of nitric acid concentration, extraction time, NaNO₃ concentration and different solvents upon extraction efficiency of ²⁴¹Am/¹⁵²Eu were studied. The results show that compound a exhibits very good selectivity in extraction of ²⁴¹Am（Ⅲ）, and n-dodecane+n-octanol(1∶1) is more suitable as solvent. Otherwise, on condition of c(H⁺)=1-2 mol/L,10 min extraction time, NaNO₃ concentration less than 4mol/L, extraction agents achieve the best separation performance.

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