Tert-butylation of p-cresol catalyzed by Al-MCM-41 mesoporous molecular sieves
Al-MCM-41介孔分子筛催化对甲酚叔丁基化反应的研究

Mesoporous molecular sieves Al-MCM-41 with n(SiO_2)/n(Al_2O_3) ratio being 20,50 and 100 were prepared.As proved by X-ray diffraction(XRD) patterns and the N_2 physical sorption,the as-synthesized Al-MCM-41 exhibited typical hexagonal structure,large surface areas and narrow pore distribution.The performance of HAl-MCM-41 as catalyst for tert-butylation of p-cresol with methyl tert-butyl-ether(MTBE) was then investigated.The effects of temperature,weight hourly space velocity(WHSV) and the feed ratio n(MTBE)/n(p-cresol) on p-cresol conversion and product selectivity were examined.The results showed that mesoporous HAl-MCM-41 molecular sieves(n(SiO_2)/n(Al_2O_3) = 20) is an efficient catalyst with high activity,selectivity and stability for the synthesis of 2-tert-butyl-p-cresol from p-cresol and MTBE by tert-butylation.