Abstract
During the solvent extraction studies on zirconium and niobium in the system of TBP-hydrochloric acid solution, it was found that both elements are extracted with very diluted TBP in toluene from 810N hydrochloric acid.Extraction with 1% TBP in toluene from 8-10N hydrochloric acid provides a nice method for the separation of zirconium and niobium from the slow neutron fission products of uranium.(1) A synthetic mixture was prepared by adding 95Zr-95Nb into an old fission products solution. From the mixture, 95Zr-95Nb was recovered by 1% TBP extraction from 10N hydrochloric acid.(2) The fission products of uranium, irradiated in JRR-1 for 2 hr and cooled for one day, was dissolved in 8N hydrochloric acid and shaken with 1% TBP. The zirconium and niobium extracted were stripped from the organic phase with 0.5N hydrochloric acid.(3) Starting from a mixture of 95Zr-95Nb, 141Ce and small amounts of other fission products, 95Zr-95Nb was isolated by a similar extraction from 10N acid.This method is supposed to be a handy method for the cleaning up of 95Zr-95Nb tracer.
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