METHOD FOR PRODUCING URANIUM OXIDE AND SILICON TETRAFLUORIDE FROM URANIUM TETRAFLUORIDE Russian patent published in 2017 - IPC C01G43/01 C01B33/107 B82Y40/00 

FIELD: physics.

SUBSTANCE: method comprises mixing in the stoichiometric ratio of uranium tetrafluoride and silica previously subjected to the mechanical activation in the presence of 0.5-1.5 wt % of inorganic alkali element compound, granulating the homogenized blend, drying the granules at the temperature of 100 to 250°C and subsequent heating the granules at the temperature not higher than 600°C for 0.5 to 1 hour. Lithium fluoride, or potassium, or rubidium, or cesium, or chloride, or nitrate, or carbonate, or sulfate, or hydroxide, or phosphate of lithium, sodium, potassium, rubidium or cesium are used as an inorganic compound of the alkali element. To produce U₃O₈, heating is performed in the dry air environment, to produce UO₂ - in an environment of the drained inert gases.

EFFECT: reducing power consumption and high product yield, including high-purity silicon tetrafluoride.

4 dwg, 1 tbl, 15 ex