| abstract |
The invention relates to diphosphine dioxides, which can be used for the extraction of actinides such as Pu, Am, Np from aqueous effluents and from concentrates of fission products from plants for the reprocessing of spent nuclear fuel. These diphosphine dioxides correspond to one of the following formulas: (CF DRAWING IN BOPI) in which R1, R2, R3, R4, R and R 'are optionally substituted alkyl or aryl groups, and Q and Q' are chains hydrocarbons optionally comprising oxygen, sulfur or nitrogen atoms. |