PROCESS FOR THE EXTRACTION OF URANIUM (VI) AND/OR PLUTONIUM (IV) PRESENT IN AN ACID AQUEOUS SOLUTION BY MEANS OF A MIXTURE OF N,N-DIALKYL AMIDES USABLE FOR THE REPROCESSING OF IRRADIATED NUCLEAR FUELS

摘要

The invention relates to a process for the extraction of uranium (VI) and/or plutonium (IV) present in an acid aqueous solution by means of a mixture of N,N-dialkyl amides usable for the reprocessing of irradiated nuclear fuels. In (50 or 52) contacting takes place between an aqueous solution containing U(VI) and Pu(IV) and an organic solvent incorporating a mixture of two N,N-dialkyl amides, e.g. of formulas: <IMAGE> and <IMAGE> and then by separating (in 50 or 52) the organic solvent containing either U(VI) and Pu(IV), or U(VI).