METHOD OF HIGH-CONCENTRATED URANIUM PROCESSING Russian patent published in 1998 - IPC

FIELD: chemical technology, nuclear materials. SUBSTANCE: high-concentrated uranium is placed to nitric acid solution. Extractive purification of uranium from plutonium, alloying metals and products of radioactive element degradation is carried out using tributyl phosphate solution in hydrocarbon solvent. Denitration of uranium solution to oxides is carried out in low-temperature air plasma. Obtained uranium oxides are fluorinated in homogeneous mixture with calcium and/or magnesium oxides at their content 0.5-2 wt. -% of uranium content in mixture. Calcium and/or magnesium can be added to uranium solution before denitration. Invention ensures to process high-concentrated uranium to low-concentrated product. EFFECT: increased purity degree of uranium from plutonium and output of process. 3 cl, 1 tbl