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采用 0 .3～ 2 .0mol/dm3的硫酸水溶液浸渍预焙烧过的二元氧化物 ,然后在 4 50～ 6 50℃的温度下焙烧 3～ 5h ,制得SiO2 /ZrO2 摩尔比为 1∶9～ 30的SO4 2 - /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 1.0mol/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 .
The pre-calcined binary oxide is impregnated with a sulfuric acid solution of 0.3-2.0 mol / dm3 and then calcined at a temperature of 4-50-650 ° C. for 3-5 hours to obtain a SiO2 / ZrO2 molar ratio of 1: 9 ~ 30 SO42- / ZrO2 -SiO2 catalyst.ZrO2 -SiO2 binary oxide precursor by precipitation / mixed precipitation method for acetic acid / butanol esterification, the activity of the catalyst obtained than the traditional SO2 - 4 / ZrO2 catalyst was 6 ~ 10 times higher than that of the other catalysts.The effects of preparation conditions such as molar ratio of SiO2 to ZrO2, concentration of sulfuric acid solution, pre-calcination temperature and calcination temperature on the catalyst activity were investigated.The molar ratio of SiO2 / ZrO2 was 10-15, / dm3 sulfuric acid solution impregnated, and calcined at a temperature of 550 ℃ prepared catalyst showed the best catalytic activity.