吡啶酰胺的合成及萃取U(Ⅵ)的性能研究  

Synthesis of Picolinamide and its Extraction Performance for Uranium(Ⅵ)

作　　者：程倩[1] 包伯荣[1] 曹卫国[1] 陈荣卿[1] 

机构地区：[1]上海大学理学院化学系,上海200436

出　　处：《核化学与放射化学》2004年第3期171-174,183,共5页Journal of Nuclear and Radiochemistry

摘　　要：合成了一种新型酰胺类螯合剂,用IR,1HNMR及气相色谱 质谱等方法对其结构进行了表征。研究了以二氯乙烷为溶剂时,该萃取剂在硝酸介质中对铀(Ⅵ)的萃取行为,考察了稀释剂、萃取剂浓度、酸度、温度及盐析剂离子强度对萃取分配比的影响。同时对萃合物的化学组成及萃取机理进行了分析和讨论。研究结果表明,吡啶酰胺对铀(Ⅵ)的萃取属中性配合萃取,形成1∶1的配合物,在萃取过程中没有形成三相。A novel chelating extractant,1-(2-pyridyl)-1-pyrrolidyl-1-methanone,is synthesized from picolinic acid and pyrrolidine and identified by IR, ~1 H MNR and GC-MS. The influence of various factors on the extraction of U(Ⅵ) from aqueous nitric acid solutions with this picolinamide (L) is studied,including diluent,extractant concentration, acidity of aqueous phase,ionic strength of salting-out agent and temperature. The extracted species is deduced to be UO_2(NO_3)_2·L from the experimental results. No emulsification or third-phase formation is observed.

关 键 词：吡啶酰胺 合成 铀 萃取性能 中性配合萃取 高放废液处理 

分 类 号：TL941.1[核科学技术—辐射防护及环境保护]