| abstract |
THE INVENTION REFERS TO CALIX (4) ARENOS-CORONAS ITS PREPARATION PROCESS AND ITS USE FOR THE SELECTIVE EXTRACTION OF CESIUM AND ACTINIDES. THESE CALIX {(4 ARENOS-CROWNS RESPOND TO THE FORMULA (I) IN WHICH R1 REPRESENTS A GROUP OF FORMULA (X (C2H4 X) MYX (C2H4 X) NX (C2H4X) N WITH X = 0 ON (R4) M = 3 , 4,5 OR 6, Y = CYCLLOALKYLENE OR ARYLENE YN = 1, 2 OR 3. THESE CALIX {(4 SANDS-CROWNS WHOSE NUCLEI BENZENICES ARE EVENTUALLY SUBSTITUTED BY ALKILO GROUPS, MAY BE USED AS EXTRACTANTS, FOR EXAMPLE BY FORMER MEMBERS IN FORMAT , TO SEPARATE THE CESIUM OF ACIDIC SOLUTIONS CONTAINING SODIUM IN IMPORTANT AMOUNTS REGARDING THE QUANTITY OF CESIUM, FOR EXAMPLE EFFLUENTS OF IRRADIATED FUELS FACTORIES. |