PROCEDE POUR SEPARER EN MILIEU AQUEUX DES LANTHANIDES ET/OU DES ACTINIDES PAR COMPLEXATION-NANOFILTRATION, ET NOUVEAUX COMPLEXANTS MIS EN OEUVRE DANS CE PROCEDE

摘要

The invention concerns the separation of lanthanides and actinides by combined nanofiltration-complexing. The invention aims at providing an inexpensive, efficient and simple technique for separating lanthanides and actinides. The inventive method is characterised in that it consists in using amino polyacid ligands such as EDTA and DPTA for complexing the lanthanides and/or actinides, before separating them by nanofiltration. The invention also concerns novel amino polyacid ligands, except EDTA and DPTA. The invention is useful for producing rare earths or treating nuclear waste, in particular derived from recycling treatment processes of spent nuclear fuels.