Title:
【発明の名称】プルトニウムの原子価制御方法
Document Type and Number:
Japanese Patent JP2972369
Kind Code:
B2
Abstract:
A method for selectively reducing tetravalent plutonium dissolved in an aqueous solution or organic solvent solution together with hexavalent uranium, which comprises adding isobutyraldehyde to said solution. Separation between uranium and plutonium in nuclear fuel reprocessing can be carried out by adding isobutyraldehyde to an extract of tetravalent plutonium and hexavalent uranium in a TBP solvent, and back extracting the trivalent plutonium thus produced into a nitric acid solution. Isobutyraldehyde also acts to remove nitrous acid from the nitric acid to prevent re-oxidation of the trivalent plutonium, and its oxidation product, butyric acid, is readily decomposed.
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Inventors:
UCHAMA GUNZO
HOTOKU SHINOBU
FUJINE YUKIO
MAEDA MITSURU
HOTOKU SHINOBU
FUJINE YUKIO
MAEDA MITSURU
Application Number:
JP6427891A
Publication Date:
November 08, 1999
Filing Date:
March 28, 1991
Export Citation:
Assignee:
NIPPON GENSHIRYOKU KENKYUSHO
International Classes:
C22B60/02; C22B60/04; G21C19/46; G21F9/06; (IPC1-7): G21C19/46; G21F9/06
Attorney, Agent or Firm:
Jun Tsuda (3 others)