METHOD OF SELECTIVE EXTRACTION OF RADIONUCLIDES FROM RADIOACTIVE NITRIC ACID SOLUTIONS (VERSIONS) Russian patent published in 2014 - IPC G21F9/00 G21F9/04 

FIELD: chemistry.

SUBSTANCE: invention relates to radiochemical technology and can be used in production of "reactor" ⁹⁹Mo as a generator of ^99mTc of a biomedical purpose, as well as in an analysis of technological solutions for preliminary separation of Mo or Mo and Zr in extraction reprocessing of solutions of technology of spent nuclear fuel of nuclear power plants (NPP SNF). Described are versions of methods of selective extractive separation of a considerable part of molybdenum or together molybdenum and zirconium from radioactive solutions with obtaining an extract. A reprocessed radioactive solution is processed with an extractant, which represents poorly soluble in a water phase alcohol, in the presence of an extracted complexing agent. As the complexing agent, hydroxamic acids with a number of carbon atoms 6-12 can be used, which ensures sufficiently complete extraction of molybdenum and zirconium in an organic phase. Molybdenum or molybdenum and zirconium are separated from the extract in the compact form by sublimation or re-extraction.

EFFECT: obtaining the extract, purified from alpha- and gamma-radioactive admixtures more than by 100 times, and further separate extraction of radionuclides from the extract, combined in the final stage of the process with the extractant regeneration.

17 cl, 2 tbl, 12 ex