METHOD OF PROCESSING PROCESSED ION EXCHANGE RESINS Russian patent published in 2017 - IPC G21F9/04 

FIELD: chemistry.

SUBSTANCE: method for processing spent ion exchange resins involves grinding the resin grains to a particle size of not more than 500 mcm, preparing 18-22% of a suspension of ground resin in an alkali solution at a concentration of 5-50 g/l, oxidizing the slurry in the reactor by supplying air to the oxidation zone in conditions of the supercritical state of water at a temperature of 480-580°C and a pressure of 235-245 atm, the withdrawal of gaseous oxidation products in the form of water vapour, CO₂ and N₂, the removal of solid reaction products in the form of an aqueous suspension, the oxidation of solid reaction products in an additional reactor when air is supplied to the oxidation zone under supercritical water conditions at a temperature of 480-580°C and a pressure of 235-245 atm, condensation of water vapour, separation of gaseous, solid and liquid phases.

EFFECT: invention allows to reduce energy costs for grinding, to shorten the grinding time.

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