| 摘要 |
The invention relates to a process for the synthesis of a mixed peroxide or hydroxo-peroxide of an actinyl and of at least one cation X1, in which the actinyl is a uranyl or a neptunyl and said at least one cation X1 is a doubly, triply or quadruply charged cation of a metal. This process comprises the reaction, in a solvent, of a salt of said at least one cation X1 with a compound C2 chosen from the mixed peroxides and hydroxo-peroxides of the actinyl and of at least one singly charged cation X2, as a result of which the compound C2 is converted into the peroxide or the hydroxo-peroxide by replacement of said at least one cation X2 with said at least one cation X1. It also relates to a process for the synthesis of a mixed oxide of an actinide chosen from uranium and neptunium, and of at least one metal capable of forming a doubly, triply or quadruply charged cation, which implements the preceding synthesis process. It also relates to a mixed peroxide or hydroxo-peroxide of an actinyl and of at least one doubly, triply or quadruply charged cation of a metal, and also to the use thereof for preparing a mixed oxide of an actinide and of at least this metal. Uses: manufacture of mixed oxides of actinides suitable for use in the manufacture of nuclear fuel pellets or of transmutation targets, decontamination of effluents contaminated with radionuclides from nuclear facilities, etc. |
