液-液萃取法从钨中分离钽

SEPARATION OF TANTALUM FROM TUNGSTEN BY LIQUID LIQUID EXTRACTION

用放射化学方法和γ谱测量技术检验了在ＨＮＯ３－ＨＦ体系中用甲基异丁基酮萃取钽的快速化学分离流程。实验结果表明，该流程在ＨＮＯ３－ＨＦ体系中能快速、有效地从１４ＭｅＶ中子轰击天然钨靶样中分离钽，对Ｗ的去污系数在１０４以上。将上述化学流程用于中能１８Ｏ离子轰击过的钨靶时，从γ谱图发现，除少数元素未被分离外。

A rapid radiochemical separation procedure is performed using radiochemical separation method and γ spectrum measurement technique.In the procedure,tantalum produced by 14 MeV neutrons bombardment of natural tungsten is extracted by isobutyl methyl ketone from the HF HNO 3 solution.The experimental result shows that this separation procedure is rapid and efficient for separating tantalum from the mixed solution of HF HNO 3 by isobutyl methyl ketone and the decontamination factors are more than 10 4.At the same time,the procedure is also used to separate tantalum from tungsten targets bombarded with intermediate energy ( 18 O).The measured γ spectrum shows that tantalum has been separated from most elements produced in the nuclear reactions except for less elements.