吗啉基功能化酸性离子液体催化苯酚-叔丁醇选择性烷基化反应

Selective Alkylation of Phenol with Tert-butyl Alcohol Catalyzed by Morpholine-based Task Specific Acidic Ionic Liquids

研究了吗啉基磺酸功能化离子液体催化苯酚与叔丁醇的烷基化反应.考察不同的功能化离子液体、反应时间、反应温度、苯酚与叔丁醇的摩尔比以及离子液体的用量等反应条件对烷基化反应的影响,并考察了离子液体的循环使用.研究结果表明离子液体用量为20%苯酚时,在最佳优化条件下苯酚的转化率和选择性分别为92.4%和64.1%;离子液体重复使用三次,其催化活性不变.

Alkylation reaction of phenol with text-butyl alcohol （TBA） catalyzed by morpholine-based acidic ionic liquids has been investigated. The influences of different ionic liquids, reaction time, reaction temperature, reactant ratio （mole ratio of phenol to that of TBA）, the amount and the recycle of the ionic liquid were studied. The experimental results demonstrate that when the amount of the ILs was 20% phenol, the conversion of phenol and the selectivity of 2, 4-DTBP were 92. 4 and 64. 1%, respectively, under optimum reaction condition. And the ILs could be reused over three times.