活性炭负载乙酸钾催化邻苯二酚和乙醇合成邻羟基苯乙醚

以活性碳为载体,以乙酸钾为活性组分的固体碱催化剂对邻苯二酚与乙醇气固相催化合成邻羟基苯乙醚的过程,考察了乙酸钾负载量对催化剂活性的影响以及反应条件对该反应的影响。结果表明随乙酸钾负载量的增加催化剂的碱性先增加后减小,乙酸钾负载量为15%质量分数的催化剂对该反应有最好的催化性能,当反应温度为433 K,邻苯二酚和乙醇摩尔比为10时,反应时间为150 min较适宜。在此条件下,邻苯二酚的转化率和邻羟基苯乙醚的选择性分别为99%和97%。

Synthesis of Catechol Ethylether from Catechol and Ethanol Over Potasssium Loaded Active Carbon Catalyst

Synthesis of catechol ethylether by ethylation of catechol with ethanol is carried out over potassium acetate.Results show that the catalyst of 15 wt % potassium acetate loaded on active carbon exhibites the highest catalytic activity.Under the reaction conditions as follows： 433K and 1∶5 of molar ratio of ethanol to catechol,150 min of reaction time,the conversion rate of catechol and seletivity of catechol ethylether can both 99.5 % and 97.8 %.