Journal of Industrial and Engineering Chemistry, Vol.9, No.6, 748-752, November, 2003
Tertiary Butylation of Phenol over HY and Dealuminated HY Zeolites
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The catalytic properties of HY and dealuminated HY zeolites in the vapor phase t-butylation of phenol with t-butyl alcohol (TBA) in the temperature range 100-200 ℃ are reported. The influence of various reaction parameters such as temperature, space velocity, molar ratio of the reactants are discussed. The main products are p-t-butyl phenol (p-TBP), o-t-butyl phenol (o-TBP), are 2,4-di-t-butyl phenol (2,4-DTPB). The products distribution depends on the reaction temperature, number of acid sites and the ratio of Brnsted to Lewis acid sites. which changes with the steaming temperature. Lower molar ratio of reactants and higher apace velocity, facilitated mono alkylated products.
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