摘要
以工业甘油和自制催化剂为原料在环路反应器上制备聚甘油，通过监测反应过程中游离甘油含量和羟值的变化以确定甘油转化率和产物的平均聚合度。研究了反应温度、催化剂用量和反应器压力对甘油转化率及产品平均聚合度的影响。结果表明，环路反应器制备聚甘油的优化工艺条件为：反应温度240℃，催化剂用量2．0％，反应器压力0．2～0．3MPa；此条件下甘油转化率可以达到99％以上，产品的平均聚合度能达到20以上。
Polyglycerol was prepared in a loop reactor with industrial grade glycerol as starting material and cat-alyst self- made in laboratory. The free glycerol content and hydroxyl value of the product were measured to determine the conversion of glycerol and the average degree of polymerization, respectively. The effects of reaction temperature, dosage of catalyst and the operating pressure on glycerol conversion and degree of polymerization were investigated. The optimal process conditions were identified as： reaction temperature, 240℃ ;dosage of catalyst,2.0% ;operating pressure ,0.2 -0. 3 MPa. The conversion of glycerol could reach 99% and the polymerization degree of the product obtained is higher than 20.
出处
《日用化学工业》
CAS
CSCD
北大核心
2014年第7期383-386,共4页
China Surfactant Detergent & Cosmetics
基金
国家国际科技合作专项资助项目(2013DFA42120)
关键词
聚甘油
环路反应器
聚合度
polyglycerol
loop reactor
polymerization degree
