CAJ | 학술논문

采用0.3～2.0 mol/dm3 的硫酸水溶液浸渍预焙烧过的二元氧化物, 然后在450～650 ℃ 的温度下焙烧3～5 h, 制得SiO2/ZrO2 摩尔比为1∶9～30的SO42-/ZrO2-SiO2催化剂.ZrO2-SiO2 二元氧化物前体由沉淀/混合沉淀法制得.对于乙酸/丁醇酯化反应，所制得的催化剂的活性比传统的SO2-4/ZrO2催化剂高6～10倍.考察了SiO2/ZrO2摩尔比，硫酸水溶液浓度，预焙烧温度和焙烧温度等制备条件对催化剂活性的影响.SiO2/ZrO2摩尔比为10～15，以1.0 mol/dm3 硫酸溶液浸渍，且在550℃温度下焙烧制得的催化剂表现出最好的催化活性.
채용0.3～2.0 mol/dm3 적류산수용액침지예배소과적이원양화물, 연후재450～650 ℃ 적온도하배소3～5 h, 제득SiO2/ZrO2 마이비위1∶9～30적SO42-/ZrO2-SiO2최화제.ZrO2-SiO2 이원양화물전체유침정/혼합침정법제득.대우을산/정순지화반응，소제득적최화제적활성비전통적SO2-4/ZrO2최화제고6～10배.고찰료SiO2/ZrO2마이비，류산수용액농도，예배소온도화배소온도등제비조건대최화제활성적영향.SiO2/ZrO2마이비위10～15，이1.0 mol/dm3 류산용액침지，차재550℃온도하배소제득적최화제표현출최호적최화활성.
A new type of superacid catalysts, SO2-4/ZrO2-SiO2, in which the molar ratios of SiO2/ZrO2 range from 0.11 to 30, has been prepared by impregnating the pre_calcined binary oxides with 0.3 to 2.0 mol/dm3 H2SO4 aqueous solutions, followed by calcining at 450 to 650℃ for 3 to 5 hours. The precursor ZrO2-SiO2 binary oxides were prepared by a precipitating/mixing_precipitate method. The prepared catalyst showed an activity six to ten times higher than the traditional SO2-4/ZrO2 catalyst for the esterification of acetic acid with butanol. The effects of some preparation conditions, such as the molar ratio of SiO2/ZrO2, the concentration of H2SO4 aqueous solution, the pre_calcining temperature and calcination temperature on the catalytic activity were investigated. The catalyst with ratio of SiO2/ZrO2 of 10 to 15 and soaked with 1.0 mol/dm3 sulfuric acid solution and calcined at 550 ℃ showed the best activity.