METHOD OF PROCESSING SPENT ION-EXCHANGE RESINS Russian patent published in 2012 - IPC G21F9/04 

FIELD: chemistry.

SUBSTANCE: method of processing spent ion-exchange resins contaminated with radioactive elements involves wet grinding of resin grains to particle size 1-45 mcm, adding alkali to the obtained suspension to pH 10.5-11.0, liquid-phase oxidation of the suspension while feeding air into the oxidation zone under conditions of supercritical state of water at temperature 450-550°C and pressure 230-250 atm, removing gaseous oxidation products in form of CO₂ and N₂, separating the solid and liquid phases by filtering and subsequent deactivation of the liquid phase.

EFFECT: invention enables to reduce the volume of radioactive wastes for permanent storage, is characterised by absence of secondary gaseous wastes and does not require use of aggressive chemicals.

5 cl, 1 ex, 1 tbl