Bis-diglycolamides (BISDGA) as new extractants for lanthanides [Ln(III)] and actinides [An(III)] from aqueous high-level wastes

The present invention provides new bis-diglycolamide compounds having formula (I) which are suitable for the extraction of lanthanides [Ln(III)] and actinides [An(III)] from aqueous nitric solutions in general and from high-level radioactive liquid wastes in particular. The invention also relates to a process for preparing said compounds and a method of extraction of lanthanides [Ln(III)] and actinides [An(III)] using said compounds. Finally, the invention provides extracting solutions comprising said compounds for the joint separation of lanthanides [Ln(III)] and actinides [An(III)] from aqueous nitric solutions and preferably, from high-level radioactive liquid wastes.