用不同的铝源改性Ti MCM 41催化剂 ,得到了具有长程有序结构、n(Si) /n(Ti) =2 5的不同Si/Al比的改性Ti MCM 41.通过研究芳烃羟化反应随催化剂表面性质的变化规律发现 ,调变催化剂的表面性质 ,可控制反应物苯及目的产物苯酚与Al Ti MCM 41催化活性中心接近的程度 ,从而可实现对芳烃羟化反应化学选择性的控制 .介质极性对芳烃的化学亲和选择性也有影响 ,只有富含供电子氧原子且其极性大于苯的介质才有利于芳烃的羟化反应 Ti MCM 41 catalyst was modified with different aluminum sources to obtain modified Ti MCM 41 with different Si / Al ratios of n (Si) / n (Ti) = 25 with long-range ordered structure. The results show that the surface properties of the catalyst can be controlled by the reaction of benzene and the target product of phenol and Al Ti MCM 41 close to the catalytic activity center, which can be achieved for the aromatic hydrocarbon hydroxylation chemoselective Control.The polarity of the medium also has an influence on the chemical affinity of aromatics, only the media enriched with electron-donor oxygen atoms whose polarity is greater than benzene is favorable for the hydroxylation of aromatics