新型钨基催化剂上环己烯环氧化反应

摘要

烯烃环氧化在现代化学中具有重要的学术和工业价值，但采用绿色氧化剂过氧化氢仍面临传质的挑战。采用过氧缩合法制备了一种新型钨基催化剂，用于过氧化氢与环己烯环氧化研究，环己烯的转化率为51.2%，环氧环己烷的选择性为69.2%。结果显示该催化剂催化活性高，环氧环己烷的选择性好，反应条件温和，工艺无溶剂且绿色环保。%Olefin epoxidation is of academic and industrial importance in modern chemistry. However, olefin epoxidation is still quite a challenge due to the difficulty of mass transfer when using the green oxidant hydrogen peroxide. A novel tungsten-based catalyst for epoxidation was prepared using an oxidative condensation method, and was applied to study the effect on epoxidation of cyclohexene with commercially available hydrogen peroxide as an oxidant. The conversion of cyclohexene (51.2%) and selectivity to cyclohexene oxide (69.2%) were obtained under a certain reaction condition. It exhibited high catalytic activity and good selectivity towards cyclohexene oxide under mild conditions without any solvent and with less environmental contaminations.