METHOD OF PRODUCING GRANULAR SODIUM PERCARBONATE Russian patent published in 2012 - IPC C01B15/10 B01J2/16 

FIELD: chemistry.

SUBSTANCE: invention can be used in production of detergents and bleaching agents. Granular sodium percarbonate is obtained through granulation in a fluidised bed which contains sodium percarbonate particles, into which aqueous hydrogen peroxide solution and aqueous sodium carbonate solution are sprayed through at least one multi-component nozzle with external mixing, with simultaneous evaporation of water. The sodium carbonate solution additionally contains sodium carbonate and/or sodium percarbonate in suspended form. Before feeding into the multi-component nozzle, the sodium carbonate solution is passed through a mechanical disperser to disperse solid substances using shearing force created between the stator and the rotor.

EFFECT: invention enables to avoid clogging of multi-component nozzles and return dust-like sodium percarbonate, separated from the stream going out of the fluidised gas layer, into the granulation process.

5 cl, 2 ex