CAJ | 학술논문

用水热晶化法合成了Ti-MCM-41分子筛,并对其进行甲基硅烷化改性。用X射线衍射、傅里叶变换红外光谱和紫外漫反射光谱等手段对其结构进行了表征,在过氧化氢异丙苯做氧化剂催化环氧化丙烯制环氧丙烷的反应中,考察了催化剂的环氧化性能。结果表明：甲基硅烷化增强了Ti-MCM-41分子筛的表面疏水性,但分子筛的介孔特征仍然保持,改性后催化剂的活性提高,环氧丙烷的选择性可达92.1%。反应产物中的α,α-二甲基苄醇用于过氧化二异丙苯合成,可得过氧化二异丙苯产率71.2%。
용수열정화법합성료Ti-MCM-41분자사,병대기진행갑기규완화개성。용X사선연사、부리협변환홍외광보화자외만반사광보등수단대기결구진행료표정,재과양화경이병분주양화제최화배양화병희제배양병완적반응중,고찰료최화제적배양화성능。결과표명：갑기규완화증강료Ti-MCM-41분자사적표면소수성,단분자사적개공특정잉연보지,개성후최화제적활성제고,배양병완적선택성가체92.1%。반응산물중적α,α-이갑기변순용우과양화이이병분합성,가득과양화이이병분산솔71.2%。
Ti-MCM-41 mesoporous molecular sieves were synthesized by hydrothermal method and silylated with trimethylchlorosilane （TMCS）. The sieves were characterized by means of X-Ray diffraction （XRD）, Fourier transform infrared spectrometer （FTIR） and UV-Vis diffuse reflectance spectroscopy. The epoxidation function of Ti-MCM-41 samples were investigated in the process from epoxidation of propylene to propylene oxide with cumene hydroperoxide（CHP） as oxidant. The results showed that the silylation could enhance surface hydrophobicity of the sieves, however, existence of the mesoporous characteristics. Because of the modification the activity of the catalysts was increased, the selectivity for propylene oxide up to 92.1%. The α,α-dimethyl benzyl alcohol in the reaction product for synthesis of dicumyl peroxide, its yield was up to 71.2%.