反应结晶条件对过碳酸钠颗粒形态的影响

Influence of Crystallization Conditions on the Morphology of Sodium Percarbonate

以十水碳酸钠和双氧水为原料,通过单滴加方式制备过碳酸钠球形颗粒,考察了碳酸钠反应液中碳酸钠的质量分数、六偏磷酸钠的质量分数、氯化钠的质量分数、滴加速率和搅拌速率对产品形貌的影响.结果表明:当碳酸钠反应液中碳酸钠质量分数为33%,、六偏磷酸钠质量分数为0.18%,、氯化钠的质量分数为16%,、滴加速率为6,m L/min、搅拌速率为450,r/min时,可得到粒度大小均匀、颗粒圆整且致密性好的球形过碳酸钠颗粒.

bSodium percarbonate spherical particles were prepared by using sodium carbonate decahydrate and hydrogen peroxide as raw materials.The effects of sodium carbonate concentration,dropping speed,agglomerating agent dosage,agitation speed and the amount of salting-out agent on the product＇s shape were researched.The results showed that when the mass fraction of sodium carbonate was 33%,,the dropping speed was 6,m L/min,the adding amount of agglomerating agent was 0.18%,,the stirring speed was 450,r/min and the mass fraction of sodium chloride was 16%,,sodium percarbonate particles were uniform in size,round in grain and compact in surface.