NOVEL BIFUNCTIONAL COMPOUNDS USEFUL AS URANIUM (VI) LIGANDS AND USES THEREOF, IN PARTICULAR FOR EXTRACTING URANIUM (VI) FROM AQUEOUS PHOSPHORIC ACID SOLUTIONS

摘要

The invention relates to novel compounds which correspond to the following general formula (I): in which: R1 and R2, which are identical or different, each represent a saturated or unsaturated, linear or branched, C6 to C12 hydrocarbon-based group; ; R3 represents a saturated or unsaturated hydrocarbon group, linear or branched, C1 to C12 and optionally comprising one or more heteroatoms; R4 represents a hydrogen atom or a linear or branched, C1 to C12 saturated or unsaturated hydrocarbon group and optionally comprising one or more heteroatoms; and R5 represents a hydrogen atom or a saturated or unsaturated hydrocarbon group, linear or branched, C 2 to C 10 carbon atoms. It also relates to the uses of these compounds as ligands for uranium (VI), in particular for extracting uranium (VI) from an aqueous solution of phosphoric acid such as a solution resulting from the attack of a natural phosphate with sulfuric acid and a process for recovering uranium (VI) present in an aqueous solution of phosphoric acid resulting from the attack of a natural phosphate by sulfuric acid and using said compounds. Applications: treatment of natural phosphates in order to valorize the uranium present in these phosphates.