Calix 4 arenas-bis-crowns, their preparation process and their use for the selective extraction of cesium and actinides.

摘要

The invention relates to calix [4] arenes-bis-crowns, their preparation process and their use for the selective extraction of cesium and actinides. BR/ These calix [4] arenas-bis-crowns correspond to the formula: BR/ (CF DRAWING IN BOPI) BR/ BR/ in which R1 and R2 represent respectively X (C2 H4 X) m and X (C2 H4 X) n with X = 0 or N, m and n = 3, 4, 5 or 6, or X (C2 H4 X) p / 2 YX (C2 H4 X) p / 2 with p = 2 or 4 and Y = cycloalkylene or arylene. BR/ These calix [4] arenes-bis-crowns whose benzene rings are optionally substituted by alkyl groups, can be used as an extractant, for example in the form of liquid membrane, to separate cesium from acid solutions containing sodium in a large amount relative to the amount of cesium, for example effluents from irradiated fuel reprocessing plants.