Patent ID: 7041267

Claim:
A process for the production of granular sodium percarbonate by fluid-bed spray granulation, the process comprising: (a) spraying (i) an aqueous sodium carbonate solution or sodium carbonate suspension, (ii) an aqueous hydrogen peroxide solution, and (iii) at least one stability-enhancing additive into a fluid bed containing sodium percarbonate particles; and (b) evaporating water at the same time as a temperature of from 40° C. to 95° C., wherein the additive is (i) a magnesium compound in an amount of from 125–1000 ppm Mg 2+ and (ii) waterglass having an SiO 2 /Na 2 O module of from 1 to 3 in an amount corresponding to 0.1 wt. % to 1 wt. % SiO 2 ; wherein the quantity of the magnesium compound and waterglass are based on the sodium percarbonate to be produced, and wherein the additive does not contain a magnesium salt in combination with a condensed phosphate.