USE OF ORGANIC-INORGANIC HYBRID MATERIAL FOR EXTRACTING URANIUM (VI) FROM AQUEOUS SOLUTION OF SULFURIC ACID, IN PARTICULAR FROM THE SULFURIC LIXATION OF A URANIUM URANIUM

摘要

The invention relates to the use of an organic-inorganic hybrid material, comprising an inorganic solid support on which are grafted organic molecules of general formula (I) below: in which: x, y and z = 0 or 1, with at least one of x, y and z different from 0; m = 1 to 6; v and w = 0 or 1, with v = 1 when w = 0, and v = 0 when w = 1; if x = 0, R1 = H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, while, if x = 1, R1 = a group bound to the inorganic solid support by at least one covalent bond; if y = 0, R2 = H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, while, if y = 1, R2 = a group bound to the inorganic solid support by at least one covalent bond; if z = 0, R3 = H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, while, if z = 1, R3 = a group bound to the inorganic solid support by at least one covalent bond; R4 and R5 = H, a linear or branched C2-C8 hydrocarbon group, saturated or unsaturated, or a monocyclic aromatic group; to extract uranium (VI) from an aqueous solution of sulfuric acid. The invention also relates to a process which makes it possible to recover the uranium (VI) present in an aqueous solution of sulfuric acid, selectively vis-à-vis other metal cations that may also be present in this solution.