摘要
以碳酸钠和双氧水为原料制备过碳酸钠.考察了反应温度、反应时间、原料配比、后处理工艺等因素对过碳酸钠产品收率和稳定性的影响.适宜工艺条件：反应温度为15℃、反应时间为30 min、复合稳定剂（聚丙烯酸钠-硅酸钠-硫酸镁）加入量为碳酸钠质量的1％、碳酸钠与双氧水物质的量比为1∶（1.5～1.6）.在此条件下,制得过碳酸钠产品活性氧含量较高.结晶后,利用双氧水溶液对晶粒进行洗涤,于50℃下干燥3h,过碳酸钠产品收率可达到88％,活性氧质量分数可达到14.75％.过碳酸钠产品存储35 d后,活性氧质量分数仍可达到13.90％,稳定性较好.
Sodium percarbonate was prepared with sodium carbonate and hydrogen peroxide as raw materials.The effects of reaction temperature, reaction time, mix ratio of reactants, and aftertreatment techniques ere.on yield and stability of product were investigated and analyzed.The suitable conditions were obtained as follows ：reaction temperature was 15℃ ,reaction time was 30 min,the amount of composite stabilizer （sodium polyaerylate,sodium silicate,and magnesium sulfate） was 1% （mass fraction ）, and the amount-of-substance ratio of sodium carbonate to hydrogen peroxide was 1 ：（1.5-1.6） .Under those conditions, the content of oxygen was high.After crystallization, the crystalline was washed by hydrogen peroxide solution at 50 ℃for 3 h.Then the yield of sodium perearbonate reached 88% and mass fraction of active oxygen was 14.75%.After sodi- um percarbonate was stored for 35 days, mass fraction of active oxygen was still 13.90%, exhibiting better stabilization.
出处
《无机盐工业》
CAS
北大核心
2014年第3期50-53,共4页
Inorganic Chemicals Industry
关键词
过碳酸钠
活性氧含量
稳定性
收率
sodium percarbonate
active oxygen content
stability
yield
