METHOD FOR RECYCLING PLUTONIUM FROM SPENT RADIOACTIVE FUEL

WIPO Patent Application WO/2018/157424

A1

Provided is a method for recycling plutonium from a spent radioactive fuel. The method successively comprises the following steps: extraction: tetravalent plutonium is extracted from an aqueous solution of the spent radioactive fuel using an organic solvent containing tributyl phosphate; reduction of plutonium with a reducing reagent: an organic solvent containing dimethyl hydroxylamine is added into an organic phase, so as to reduce the tetravalent plutonium into trivalent plutonium; and back extraction: an aqueous dilute acid solution is added into the organic phase so as to re-extract plutonium into the aqueous phase for recycling. The use of the method for recycling plutonium from a spent radioactive fuel can significantly improve the efficiency of recycling plutonium from a spent radioactive fuel with respect to HAN back extraction, and at the same time, can avoid the problems resulting from U (IV) reduction and extraction.

JPH0627290	METHOD FOR PROCESSING PRODUCT CONTAINING RADIOACTIVE ELEMENT AND MICROWAVE HEATING DEVICE FOR RADIOACTIVE PRODUCT
JP2972369	[Title of Invention] Method for controlling valence of plutonium
JPS6249901	VACUUM DISTILLATION EQUIPMENT

ZUO CHEN (CN)
ZHENG WEIFANG (CN)
YAN TAIHONG (CN)

PCT/CN2017/077640

September 07, 2018

March 22, 2017

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CHINA INST OF AMOMIC ENERGY (CN)

C22B60/04; C22B3/38; C22B7/00

CN104004928A	2014-08-27
CN105734310A	2016-07-06
CN1472347A	2004-02-04
CN102352436A	2012-02-15
CN105913887A	2016-08-31
JP2015094754A	2015-05-18
GB865778A	1961-04-19

BEIJING TIANYUE GIP LAW FIRM (CN)

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