摘要
HIDA是一种氨羧类螯合剂,本文介绍了它的合成方法。合成原料为一乙醇胺,氰化钠,甲醛,氢氧化钠等,通过工艺条件的优化,确定了最佳的反应条件：合成阶段：一乙醇胺与氰化钠,甲醛,氢氧化钠投料比例为1：2.20：2.20：0.05,反应温度为70-80℃,反应时间为4-5h。后处理阶段：得到的碱解液用硫酸酸化至p H值为1.5,降温至10℃抽滤,产品洗涤后烘干。实验结果：产品液相纯度为99.6%,NTA含量为0.5%,收率为86.6%。
HIDA is a kind of ammonia carboxy chelating agent,its synthesis method has been introduced in this paper,raw materials is ethanol amine,sodium cyanide,formaldehyde,sodium hydroxide,etc.,through the optimization of process conditions,the best reaction conditions are determined： Synthetic stage： ethanol amine and sodium cyanide,formaldehyde and sodium hydroxide feeding ratio 1： 2. 20： 2. 20： 0. 05,the reaction temperature is 70 - 80℃,The reaction time is 4 to 5h. Post- processing stage： the alkaline hydrolysis fluid acidification with sulfuric acid to p H = 1. 5,suction filtration after cool down to 10 ℃,after washing and drying the product can be obtained. Results： the purity of product is more than 97%,yield is 86. 6%.
出处
《山东化工》
CAS
2015年第24期32-33,37,共3页
Shandong Chemical Industry
