CALIXARENE ACETAMIDO DERIVATIVES, PREPARATION AND USE THEREOF FOR EXTRACTING STRONTIUM

摘要

The invention concerns calixarene derivatives of formula (I), wherein: R1 represents various hydrocarbon groups; R?2 and R3¿ represent an alkyl, cycloalkyl, aryl group or a group of formula: O(CH¿2?)n [O(CH2)p]q, OR?4¿, or form together with the nitrogen atom a heterocyclic group; and m is equal to 6, 7, or 8. Said derivatives are useful for extracting strontium from aqueous solutions.