Abstract: B-ZSM-5 zeolite with a smaller crystal size and a suitable amount of framework boron was synthesized by modifying hydrothermal synthesis temperature.Ti-ZSM-5 zeolite was prepared by the gas-solid reaction of acid-treated B-ZSM-5 with gaseous TiCl₄.The samples were characterized by SEM,XRD,FT-IR,UV-Raman and UV-Vis.The performance of Ti-ZSM-5 in phenol hydroxylation was investigated.The results showed that the smaller sized Ti-ZSM-5 samples had MFI topology structure and high crystallinity, higher content of framework titanium and no extra-framework titanium.The optimal reaction conditions of phenol hydroxylation over Ti-ZSM-5 were as follows: acetone as solvent, reaction temperature 343—363 K, the mass ratio of catalyst to phenol 5.0%—10.0%, the molar ratio of phenol to hydrogen peroxide 3—6,reaction time 3—6 h.Phenol conversion could be more than 23%.

摘要： 采取变温晶化的方式，以水热法合成了具有较小晶粒尺寸和合适骨架硼含量的B-ZSM-5沸石;以B-ZSM-5沸石为母体，经过预处理脱硼以后，与TiCl₄进行气固相反应制备了Ti-ZSM-5沸石.利用SEM、XRD、FT-IR、UV-Raman、UV-Vis等手段对其进行了表征，并考察了Ti-ZSM-5沸石的苯酚羟基化性能.结果表明：该路线制备的Ti-ZSM-5沸石晶体粒度较小，具有完整的MFI拓扑结构和较高的结晶度，骨架钛含量较高，不含非骨架钛.该含钛沸石用于催化苯酚羟基化反应，合适的反应条件为：丙酮为溶剂，反应温度343 K<T<363 K，催化剂用量占苯酚质量的5.0%~10.0%，苯酚与过氧化氢的摩尔比3~6，反应时间3~6 h，苯酚的转化率可以达到23%以上.