USE OF AN ORGANIC-INORGANIC HYBRID MATERIAL FOR EXTRACTING URANIUM(VI) FROM A SULFURIC ACID AQUEOUS SOLUTION, ISSUED NOTABLY FROM THE SULFURIC LEACHING OF A URANIUM-BEARING ORE

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 having the 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, whereas, 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, whereas, 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, whereas, if z=1, R3=a group bound to the inorganic solid support by at least one covalent bond;R4 and R5═H, a saturated or unsaturated, linear or branched, C2 to C8 hydrocarbon group, or a monocyclic aromatic group;

for extracting uranium(VI) from a sulfuric acid aqueous solution.
;The invention also relates to a method that makes it possible to recover the uranium(VI) present in a sulfuric acid aqueous solution, selectively with respect to the other metal cations that may also be present in said solution.

主权项

1: A method of extracting uranium(VI) from a sulfuric acid aqueous solution, comprising:
(i) contacting the sulfuric acid aqueous solution with an organic-inorganic hybrid material, which comprises an inorganic solid support on which is grafted in a covalent manner a plurality of organic molecules of formula (I): wherein: x, y and z are equal to 0 or 1, with the proviso that at least one of x, y and z is equal to 1; m is a whole number ranging from 1 to 6; v and w are equal to 0 or 1, with the proviso that v is equal to 1 when w is equal to 0 and that v is equal to 0 when w is equal to 1; if x is equal to 0, R1 represents a hydrogen atom or a saturated or unsaturated, linear or branched hydrocarbon group, comprising 1 to 12 carbon atoms, whereas, if x is equal to 1, R1 represents a group bound to the inorganic solid support by at least one covalent bond indicated by the dotted line; if y is equal to 0, R2 represents a hydrogen atom or a saturated or unsaturated, linear or branched hydrocarbon group, comprising 1 to 12 carbon atoms, whereas, if y is equal to 1, R2 represents a group bound to the inorganic solid support by at least one covalent bond indicated by the dotted line; if z is equal to 0, R3 represents a hydrogen atom or a saturated or unsaturated, linear or branched hydrocarbon group, comprising 1 to 12 carbon atoms, whereas, if z is equal to 1, R3 represents a group bound to the inorganic solid support by at least one covalent bond indicated by the dotted line; and R4 and R5 represent, independently of each other, a hydrogen atom, a saturated or unsaturated, linear or branched hydrocarbon group, comprising 2 to 8 carbon atoms, or a monocyclic aromatic group; and then (ii) separating the sulfuric acid aqueous solution from the organic-inorganic hybrid material.