DERIVES DE CALIXARENES, LEUR PROCEDE DE PREPARATION ET LEUR UTILISATION POUR L'EXTRACTION DES ACTINIDES ET DES LANTHANIDES

摘要

The invention concerns novel calixarenes of formula (I) wherein: R<1> and R<2>, identical or different, are alkyl, alkoxy or aryl groups; and n is an integer equal to 2, 3 or 4. Said calixarenes are very useful for extracting actinides and lanthanides from aqueous solutions.