从辐照过的钍中分离镤的研究  

SEPARATION OF PROTACTINIUM FROM THORIUM IRRADIATED BY 14 MeV NEUTRONS

作　　者：方克明[1] 杨维凡[1] 牟万统[1] 袁双贵[1] 李宗伟[1] 沈水法[1] 张学谦[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《核化学与放射化学》1998年第3期176-182,共7页Journal of Nuclear and Radiochemistry

摘　　要：研究了以１－苯基－３－甲基－４－苯甲酰基吡唑啉酮－５（ＰＭＢＰ）和三异辛胺（ＴＩＯＡ）为萃取剂，盐酸－氢氟酸溶液为反萃剂，从中子辐照过的钍中分离纯化镤的一个快速、有效的流程。对流程的一些主要步骤中的分离条件作了研究。以钍的裂变产物为多重示踪剂检验了该流程，得到了主要杂质元素的去污因子，给出了镤的回收率。A rapid and efficient procedure for separation of trace protactinium from thorium irradiated by 14 MeV neutrons is described by using 1 phenyl 3 methyl 4 benzoylpyrazolone 5(PMBP) and triisooctyl amine (TIOA) as extractants and hydrochloric hydrofluoric acid solution as back extractant.The separating conditions in some main steps of this procedure has been studied.The decontamination factors for principal impurity elements and the recovery efficiency for 233 Pa has been obtained.The procedure is verified by using the active products of thorium as multitracers.

关 键 词：镤 钍 PMBP TIOA 分离 中子辐照 萃取剂 反萃剂 

分 类 号：TL243[核科学技术—核燃料循环与材料]