Patents Assigned to Commissariat a l'Energie Atomiguie
  • Calixarene acetamido derivatives, preparation and use thereof for extracting strontium
    Patent number: 6709642
    Abstract: The invention concerns derivatives of calixarene having the formula: in which: R1 represents various hydrocarbon groups, R2 and R3 represent an alkyl, cycloalkyl or aryl group or a group having the formula: O(CH2)n[O(CH2)p]q OR4, or form a heterocyclic group with the nitrogen atom, and, n equals 6, 7 or 8. These derivatives can be used for extracting strontium from aqueous solutions.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: March 23, 2004
    Assignee: Commissariat a l'Energie Atomiguie
    Inventors: Jean-François Dozol, Rocco Ungaro, Alessandro Casnati