Al-MCM-41介孔分子筛催化对甲酚叔丁基化反应的研究

2-叔丁基对甲酚是一种有机中间体,在有机合成领域中占有重要地位,被广泛应用于表面活性剂、高档酚类抗氧化剂2246和2246-S、紫外线吸收剂UV-326等的生产[1]。特别是近十年来,以抗热老化为特征的功能性高档酚类抗氧化剂在国内外相继问世,它们对于提高聚合物材料的成型加工性能、

Tert-butylation of p-cresol catalyzed by Al-MCM-41 mesoporous molecular sieves

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.