METHOD OF PROCESSING THE URANIUM- AND FLUORINE-CONTAINING WASTES Russian patent published in 2007 - IPC C22B60/02 G21F9/28 C22B3/04 

FIELD: technology of processing uranium-and fluorine-containing wastes.

SUBSTANCE: proposed method includes preparation of solutions from wastes, concentration of solutions by sedimentation of uranium followed by dissolving of sediments in nitric acid, extraction conversion of concentrated solutions with the use of tributyl phosphate in hydrocarbon thinner and sedimentation of ammonium polyuranates from re-extracts thus obtained. Sedimentation of uranium at stage of concentration is performed with the use of sodium hydroxide at pH= 9-10 and temperature of 60-90C. Proposed method enhances purification of uranium from fluorine due to enhanced sedimentation and filtration properties of sediments at concentration stage. Content of admixtures in triuranium octa-oxide powders obtained from re-extracts by sedimentation of ammonium polyuranates and subsequent calcination does not exceed specified norms.

EFFECT: enhanced efficiency.

1 dwg, 2 tbl, 1 ex