CALIXARENE DERIVATIVES, THEIR PREPARATION PROCESS AND THEIR USE FOR THE EXTRACTION OF ACTINIDES AND LANTHANIDES

摘要

The invention relates to new calixarenes according to the formula:wherein:R1 is an alkyl or aryl group, or a hydrogen atom,R2 and R3, which may be identical or different, are alkyl or aryl groups,n is an integer ranging from 2 to 8, andp is an integer ranging from 4 to 8.Said calixarenes may be used to extract actinides and lanthanides from aqueous solutions.