负载型对甲苯磺酸催化合成乙二醇硬脂酸单酯

探讨了以负载型对甲苯磺酸为催化剂合成乙二醇硬脂酸单酯的工艺。研究了醇酸摩尔比、催化剂用量、带水剂用量、反应时间等因素对硬脂酸转化率的影响。结果表明,合成乙二醇硬脂酸酯优化条件是:n(乙二醇)∶n(硬脂酸)=3.5∶1,催化剂用量为硬脂酸的物质的量的2.8%,带水剂甲苯的用量为硬酯酸质量的30%,反应时间150min,在此条件下,酸的转化率可达97.82%。

Catalytic Synthesis of Ethylene Glycol Mono Stearate by Supported p-Toluene Sulphonic Acid

The synthesis of ethylene glycol mono stearate by supported p-toluene sulfonic acid was investigated.The factors influencing its catalytic performance were also studied and optimized,including reaction time,molar ratios of alcohol to acid,the amount of dosage and the amount of catalyst.The conversion of stearic acid was 97.82% under the optimum conditions of the molar ratio of alcohol to acid 3.5 ∶ 1,the amount of catalyst 2.8%,the dosage of toluene used as water-carrying reagent 30%,and reaction time 150 min.Moreover,the catalyst could be recycled and used for many times.