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介孔分子筛MCM-41依次与3-氯丙基三乙氧基硅烷、环己二胺和三唑醛反应,得到席夫碱修饰的新型介孔分子筛MCM-41催化剂.通过傅里叶变换红外光谱(FTIR)和X射线多晶衍射(XRD)等方法对所得催化剂进行表征.以过氧化氢为氧源,介孔分子筛MCM-41负载的席夫碱为催化剂,研究了α,β-不饱和酮的环氧化反应,考察了金属盐、溶剂、催化剂用量、反应时间等因素对环氧化反应的影响.结果表明,在室温下乙腈溶剂中,α,β-不饱和酮的环氧化反应在短时间内均以很高的产率(高达99%)得到了相应的产物.同时,对催化剂的重复利用进行了研究,发现重复使用四次,仍能以较高产率得到环氧化产物.
Mesoporous molecular sieve MCM-41 was sequentially reacted with 3-chloropropyltriethoxysilane, cyclohexanediamine and triazole aldehyde to obtain Schiff base modified mesoporous molecular sieve MCM-41 catalyst by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) were used to characterize the obtained catalyst.With hydrogen peroxide as oxygen source and Schiff base supported on mesoporous molecular sieve MCM-41 as catalyst, the effects of α, β- The effects of metal salts, solvents, catalyst amount and reaction time on the epoxidation reaction were investigated.The results showed that the epoxidation of α, β-unsaturated ketone in acetonitrile solvent at room temperature, The corresponding products were obtained in a very short time with high yield (up to 99%). At the same time, the catalyst reuse was studied and found that repeated use of four times, can still get epoxy with higher yield Products.