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菜鸟一号: 金币+150, 翻译EPI+1, ★★★★★最佳答案 2015-06-09 13:35:47
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In this research, the boehmite was treated by high-temperature roasting, producing the γ-Al2O3, which was then modified by Ce(SO4)2-H2SO4 solution impregnation method into the Ce-SO42-/ Al2O3 solid catalyst. And the soild catalyst was characterized by analysis methods such as x-ray diffraction（XRD）,infrared spectroscopy(IR), scanning electron microscope(SEM) and N2/adsorption-desorption. The results show that the active component load exert a great influence on the structure of Al2O3 substrate,such as structure changing from laminated structure to granular structure, and increased specific surface area that was measured as 346.3m2 /g by BET. After particle accumulation, channels were produced within the mesoporous range with average aperture of approximately 5.29nm. The Ce-SO42-/ Al2O3 catalyst can play a good effect in the synthesis of acetic acid n-butyl ester, in particular, when the substance ratio of glacial acetic acid and n-butyl alcohol is 1:1.0, with the addtition of 0.375g catalyst (equals the 5% of glacial acetic acid mass) , after reaction for 3h,the esterification rate can reach 93.42％. |
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