低碳化学与化工2025，Vol.50Issue(11)：36-43,8.DOI:10.12434/j.issn.2097-2547.20250036
多级孔钛硅分子筛催化环己烯合成环氧环己烷性能研究
Study on catalytic performances of hierarchical titanium silicate zeolites for synthesis of epoxycyclohexane from cyclohexene
摘要
Abstract
As an important organic intermediate,epoxycyclohexane has shown a very broad application prospect in the field of chemistry and chemical engineering.However,current synthesis faces the problems of low selectivity and efficiency.Titanium silicate zeolites have unique porous structures and catalytic active centers,which can be used for efficient synthesis of epoxycyclohexane.Two types of titanium silicate zeolites(Ti-CHO-1 and Ti-CHO-2)were prepared,and their structures were characterized by XRD and UV-Raman spectroscopy,etc.The catalytic performance of Ti-CHO-1 and Ti-CHO-2 in synthesis of epoxycyclohexane by hydrogen peroxide(H2O2)oxidation of cyclohexene was studied,and the reaction conditions were optimized by optimal titanium silicate zeolites.The results indicate that compared to Ti-CHO-1,Ti-CHO-2 with hierarchical structure has a lower TiO2 content and lower acidity,resulting in better catalytic performance.Under the optimal conditions of acetonitrile solvent,temperature of 80℃,time of 4.0 h,cyclohexene dosage of 40 mmol,30%(mass fraction)H2O2 dosage of 40 mmol(dropping time of 10 min),EDTA disodium salt dosage of 60 mg and Ti-CHO-2 dosage of 0.8 g,the conversion rate of cyclohexene,selectivity of epoxycyclohexane and yield of epoxycyclohexane are 87.2%,83.1%,and 72.5%,respectively.Under optimal conditions for 5 cycles,the catalytic performance of Ti-CHO-2 can remain stable,which demonstrates that it has good recyclability.关键词
环氧环己烷/双氧水/环己烯/催化氧化/钛硅分子筛Key words
epoxycyclohexane/hydrogen peroxide/cyclohexene/catalytic oxidation/titanium silicate zeolites分类
化学化工引用本文复制引用
王洋,贾立明,白红鑫..多级孔钛硅分子筛催化环己烯合成环氧环己烷性能研究[J].低碳化学与化工,2025,50(11):36-43,8.基金项目
国家自然科学基金重点项目(22438004). （22438004）
