METHOD FOR URANIUM TETRAFLUORIDE PRODUCTION Russian patent published in 2017 - IPC C01G43/06 

FIELD: chemistry.

SUBSTANCE: uranium dioxide is mixed with ammonium bifluoride, the mixture of powders is placed in a closed container with limited air access, the closed container is placed in another container with a gap that is filled with carbon graphite material in the form of granules so that the granules completely cover the closed container, the resulting mixture is heat-treated at the stage of the formation of a double uranium salt in the air atmosphere at a temperature above the melting point of ammonium bifluoride, but below its boiling point and the double salt is heat-treated at the stage of its decomposition to uranium tetrafluoride at a temperature above the onset of carbon and graphite material oxidation but below the uranium tetrafluoride melting point.

EFFECT: production of conditional uranium tetrafluoride with low oxygen content, high bulk density and yield more than 99 percent, process simplification.

10 cl, 2 tbl