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本文制备了ＳＯ_４~（２－）／Ｆｅ_２Ｏ_３－Ａｌ_２Ｏ_３系列固体酸催化剂，评价了各催化剂对醋酸与乙酸的酯化反应活性，该活性与由乙醇和苯探针分子的吸附热所标度的催化剂表面酸强度有较好关联。发现在７７３～８２３Ｋ温度下处理所得的ＳＯ_４~（２－）／Ｆｅ_２Ｏ_３－Ａｌ_２Ｏ_３催化剂的酸强度较大，催化活性较高．ＤＴＡ、ＩＲ和ＸＲＤ分析表明在该温度条件下处理所得的催化剂表面的硫酸根离子以剪式双配位于ｒ－Ｆｅ_２Ｏ_３之上。
In this paper, a series of SO_4 ~ (2 -) / Fe_2O_3-Al_2O_3 solid acid catalysts were prepared, and the esterification reactivity of acetic acid and acetic acid was evaluated for each catalyst. The activity was related to the catalytic activity of the catalysts scaled by the heat of adsorption of ethanol and benzene probe molecules Surface acid strength is better correlated. It was found that the acidity of SO_4 ~ (2 -) / Fe_2O_3-Al_2O_3 catalyst treated at 773 ~ 823K was higher and the catalytic activity was higher. DTA, IR and XRD analyzes showed that the sulfate ions on the surface of the catalyst obtained under the conditions of temperature were sci-bidentally bidentate on r-Fe 2 O 3.