A METHOD FOR SEPARATION OF THREE-VALENT ACTINIDES AND, AT LEAST MEASUREMENT, OF ONE THREE-VALUE LANTHANIDE BY MEANS OF BIS (ARYL) DITIOPHOSPHINIC ACID AS EXTRAGENT AND ORGOPHOSPHATE BY WHAT A CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER THIS CHAPTER WHITE CHAPTER

摘要

The application describes a method for the separation of trivalent actinides and trivalent lanthanides, in which trivalent actinides are extracted from an aqueous solution at an H-concentration ranging from 0.01 to 2 moles / l using bis (aryl) dithiophosphinic acid of the general formula (4) RRPS (SH ), where R denotes phenyl or naphthyl, R denotes phenyl or naphthyl, as well as these residues R and R may be replaced by methyl, ethyl, propyl, isopropyl, cyano, nitro or halogenyl, with the addition of trioctyl phosphate, tris (2-propylphenyl) diphosphine. - ethylhexyl) phos veil as a synergist. The use of a synergist helps to increase the selectivity in the extraction process. In one of the preferred embodiments of the invention, at least one component from the group comprising toluene, xylene, (t-butyl) benzene, bis (t-butyl) benzene, tris (t-butyl) benzene is used as an aromatic solvent. , bis (isopropyl) benzene and tris (isopropyl) benzene, which additionally makes it possible to increase the selectivity with respect to An (III), as well as to increase the distribution coefficient of DAn (III). The international application was published together with an international search report.