In this work, we have systematically studied the kinetics and mechanism of ionic liquid catalyzed solvent less liquid-phase O-methylation of p-cresol with dimethyl carbonate (DMC). The effect of various parameters such as mass transfer resistance, catalyst loading, mole ratio, initial CO₂ pressure, and temperature was studied. The reaction was found to be pseudo zero order with respect to p-cresol and first order with respect to DMC. o- and m-Cresols were also used. The values of apparent activation energy for o-, m-, and p-cresol are found as 32.5, 34.0, and 32.5 kcal/mol, respectively. Our study also suggests that type of cation and anion affects the catalytic acitivity of ionic liquids. Ionic liquid, tetra butyl phosphonium bromide, offers excellent activity, selectivity, reusability, recyclability and stability.

在这项工作中，我们系统地研究了离子液体催化的对甲苯酚与碳酸二甲酯（DMC）的液相O-甲基化的溶剂化反应。研究了传质阻力，催化剂负载量，摩尔比，初始CO ₂压力和温度等各种参数的影响。发现该反应相对于对甲酚为伪零级，相对于DMC为一级。ø -和米-Cresols还使用。o-，m-和p的表观活化能值甲酚含量分别为32.5、34.0和32.5 kcal / mol。我们的研究还表明，阳离子和阴离子的类型会影响离子液体的催化活性。离子液体溴化四丁基phospho具有出色的活性，选择性，可重复使用性，可回收性和稳定性。