摘要
以粉煤灰(FA)为原料制备了一种新型的固体酸催化剂,用X射线衍射、热分析和红外光谱等手段表征了催化剂的物化性能。研究了催化剂在环己酮与乙二醇的缩合反应中的催化性能,系统考察了带水剂种类、带水剂用量、酮醇量比、催化剂用量、反应时间等因素对缩酮产率的影响。通过正交实验得出了最佳反应条件:n(环己酮)∶n(乙二醇)=1∶1.4、催化剂用量为环己酮质量的2%、带水剂环己烷用量10.0mL、反应时间2h,缩酮产率可达99.6%。该催化剂活性较高,可重复使用。
Cyclohexanone glycol ketal was synthesis from cyclohexanone and ethylene glycol in the presence of a late-model catalyst, which was prepared with fly ash as raw material. The catalysts were characterized by means of XRD, TG and FTIR. Various reaction parameters, such as the molar ratio of cyclohexanone to ethylene glycol, amount of catalyst, reaction time, water-carrying reagent and other factors influencing the synthesis were discussed and the optimum conditions was established. The results showed that molar ratio of cyclohexanone to ethylene glycol was 1 ： 1.4, the amount of catalyst was 2% cyclohexanone, amount of cyclohexane was 10 mL, the reaction time 2 h, the yield of cyclohexanone ethylene ketal reached 99.6% under the optimum condition. The catalyst had a higher activity with respect to condensation reaction and can be used repeatedly.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2009年第3期499-503,共5页
Chemical Industry and Engineering Progress
基金
国家自然科学基金资助项目(20572021)
关键词
粉煤灰
硫酸铵
固体酸
环己酮乙二醇缩酮
fly ash
ammonium sulfate
solid acid
cyclohexanone glycol ketal
