Abstract: The bulk density of market available sodium percarbonate (SPC) is often no less than 850 kg/m3，it is therefore difficult to blend uniformly between the detergent and the SPC due to their difference in bulk density. The method and techniques for synthesizing low-density SPC by the wet-method were proposed. The factors，such as stabilizer and process conditions affecting the stability and density were examined. The stability mechanism of external stabilizers，such as magnesium sulfate was discussed. The bulk density of this newly prepared SPC varied from 550 kg/m3 to 750kg/m3，the wet stability was larger than 60%，and the thermal stability was larger than 90%. The average particle size of this low-density SPC varied from 0.5mm to1.0mm.

摘要： 市售过碳酸钠的堆密度通常大于850 kg/m3，容易在洗衣粉中产生分层现象，难以形成均一的混合体系。本文通过调整配方与合成工艺，湿法合成出低堆密度高稳定性的颗粒型过碳酸钠，考察了稳定剂的加入量及工艺条件等因素对产品密度及稳定性的影响，重点讨论了硫酸镁等外稳定剂的稳定机理。合成产品的堆密度为550～750 kg/m3，湿稳定性不低于60%，热稳定性不低于90%。颗粒平均粒度0.5～1.0 mm。