对甲苯磺酸催化乙二醇合成1,4-二氧六环

Catalytic synthesis of 1,4dioxane from ethanediol using p-toluene sulphonic acid as the catalyst

以对甲苯磺酸作催化剂,对乙二醇脱水制备1,4-二氧六环的反应进行研究。考察了催化剂用量、反应时间和反应温度等因素对收率的影响,得出最佳反应条件:催化剂用量为乙二醇质量的4.3%,反应时间50 min,收率可达84.82%。

1,4-dioxane was synthesis by dehydration of ethanediol using p-toluene sulphonic acid as the catalyst. Influence of catalyst dosage, reaction temperature and reaction time on the yield was investigated. The optimum reaction condition was as follows： catalyst dosage = 4.3% of the amount of ethanediol, reaction time 50 min. 1,4-dioxane yield of 84.82% was obtained under the optimum condition.