【摘要】 以树脂固载硅钨酸为催化剂,乙二醇和硬脂酸为原料,催化合成乙二醇硬脂酸酯。重点研究离子交换树脂的种类、催化剂用量、反应时间、带水剂的种类及其用量,醇酸摩尔比等因素对合成乙二醇硬脂酸酯收率的影响。结果表明,催化剂用量为硬脂酸质量的25%,反应时间为4.5h,n乙二醇:n硬脂酸=3.0:1,环己烷带水剂量为10mL,酸的转化率可达94%以上,并且催化剂可以重复使用。更多还原

【Abstract】 Silicotungstic acid Immobilized on ion exchange resin as a catalyst,ethylene glycol and stearic acid as raw materials,Synthesis of glycol stearate.Influecing on the yield of reaction craft like the type of ion exchange resin,the amount of catalyst,reaction time,with the type and amount of water-carrying agent,molar ratio of glycol to acid was investigated.The results showed that the amount of catalyst was 25%,reaction time was 4.5h,the molar ration of alcohol to acid was 3.0:1,cyclohexane was 10mL.The conversion of acetic acid was 94%,and the catalyst can be reused.更多还原