METHOD FOR PRODUCING FOAMABLE AND FLOATABLE SODIUM PERCARBONATE PARTICLE EXCELLENT IN STORAGE STABILITY

PROBLEM TO BE SOLVED: To provide a method for producing sodium percarbonate particles having improved safety during storage and excellent foaming and floating properties. SOLUTION: The method for producing sodium percarbonate particles is characterized by reacting sodium carbonate and hydrogen peroxide in an aqueous solution in the presence of 0.02-1 wt.% (based on the hydrogen peroxide) of an organic chelating agent, then granulating the resulting sodium percarbonate crystals, heating the resulting granules for 30-90 min by a hot air of 90-110°C in a fluidized bed, and further, adding a nonionic surfactant to the granules of sodium percarbonate in an amount of 0.1-0.5 wt.%, based on the granules and mixing the surfactant and the granules. COPYRIGHT: (C)2011,JPO&INPIT