PROCESS FOR THE SELECTIVE SEPARATION OF ACTINIDES (III) AND LANTHANIDES (III)

摘要

The subject of the present invention is a process for the selective separation of actinides (III) and lanthanides (III) from a reaction medium containing them, more precisely the present invention allows a selective extraction of actinides (III) by using a reaction medium. aqueous solution containing pertechnetate ions TcO4 ** -. The preferred extraction agents are chosen from picolinamides and their derivatives. This process finds particular application in the separation of actinides (III) from high activity raffinates generated during the reprocessing of nuclear fuels according to the method of the present invention. solvent extraction known as the "PUREX" process.