采用MCM-41分子筛催化剂进行液相催化苯酚与叔丁醇的烷基化反应,通过XRD、TEM、BET、NH₃-TPD等手段对催化剂进行表征,考察了反应条件对苯酚转化率、对叔丁基苯酚(PTBP)选择性以及改性处理对催化剂性能的影响。结果表明,酸改性后MCM-41分子筛并未改变其结构,酸性增强,微孔体积基本不变,比表面积、孔体积和孔径都增加。在反应温度为130℃、n(叔丁醇)∶n(苯酚)=7∶1的条件下,反应10 h内苯酚平均转化率为65%,PTBP选择性为60%。

MCM-41 molecular sieve catalyst is used to catalyze the alkylation reaction of liquid phenol and tert-butanol.The catalysts are characterized by techniques such as X-ray diffraction (XRD),transmission electron microscope (TEM),ammonia temperature-programmed desorption (NH₃-TPD),and BET surface area analysis.The effects of reaction conditions on the conversion of phenol and the selectivity of p-tert-butyl phenol (PTBP) are studied.The influences of modification treatment on the performance of catalysts are evaluated.It is shown that after acid treatment,MCM-41 molecular sieve has no significant changes in the structure and has an enhanced acidity,its micropore volume is hardly changed,but its specific surface area,pore volume and pore diameter are all increased.It is found that the average conversion of phenol reaches about 65% and the selectivity of PTBP is about 60% when the reaction has been performed for 10 h over the catalysts at 130℃ when the molar ratio of tert-butyl alcohol) to phenol is 7∶1.

韩洪林(1995-),女,硕士研究生,研究方向为催化剂及其应用,632332896@qq.com