醇析法合成过碳酸钠工艺优化研究

Study on optimization of synthesis technology of sodium percarbonate by ethanol deposition method

为确定醇析法合成过碳酸钠工艺,对反应温度、原料配比、反应时间及乙醇加入量对产品活性氧含量与收率的影响进行了考察。最后得出,反应温度对产品收率和活性氧含量的影响最大,乙醇加入量次之,反应时间和原料配比也有一定影响。通过实验得出最佳实验条件:反应温度为15℃,原料配比(碳酸钠与过氧化氢物质的量比)为1∶1.5,双氧水滴加时间为15 min,乙醇加入量为60 mL,反应时间为60 min。

For sure the process conditions of sodium percarbonate by ethanol deposition method,effects of reaction temperature,mix ratio of raw materials,reaction time,and dosage of ethanol on the content of active oxygen and yield of product were investigated.Finally concluded that the reaction temperature had biggest influence on the product yield and active oxygen content,dosage of ethanol secondly and reaction time and mix ratio also had some influences.Through the experiment,the best experimental conditions were obtained as follows：reaction temperature was 15 ℃,mix ratio of raw materials（amount-of-substance ratio of sodium carbonate to hydrogen peroxide） was 1∶1.5,hydrogen peroxide droped for 15 min,ethanol dosage was 60 mL,and reaction time was 60 min.