| 摘要 |
A method for the preparation of sodium percarbonate granules having enhanced stability, comprising modifying the surface of the sodium percarbonate granules by a surface reaction between sodium percarbonate and carbon dioxide or bicarbonate species to form a dense solid film of essentially sodium bicarbonate on the surface of the sodium percarbonate granules, the method comprising the steps of:a) dissolving carbon dioxide in water to form an aqueous solution containing dissolved carbon dioxide and bicarbonate,b) exposing the surface of the sodium percarbonate granules to a spray of the aqueous solution containing dissolved carbon dioxide and bicarbonate, to form the solid film of essentially sodium bicarbonate, and subsequentlyc) removing the residual fluid from the surface.
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