【摘要】 以无水氯化锆、过硫酸铵、硫酸亚铁、硝酸铁为原料，采用共沉淀-浸渍法制备了二元磁性S₂O₈^2-/Fe₃O₄-ZrO₂固体酸催化剂，利用IR、XRD、BET、NH₃-TPD对二元磁性固体酸进行表征，并用于乙酸乙酯的合成反应。实验结果表明：催化剂制备条件为Fe₃O₄的添加量35%,过硫酸铵的浸渍浓度0.5 mol/L;适宜的酯化条件为醇酸摩尔比3∶1,酯化时间2 h,固体超强酸的用量0.5 g。以S₂O₈^2-/Fe₃O₄-ZrO₂为催化剂乙酸乙酯酯化率90.25%,重复4次后，乙酸乙酯的酯化率可达62.5%。更多还原

【Abstract】 A binary magnetic S₂O₈^2-/Fe₃O₄-ZrO₂ solid acid catalyst was prepared by co precipitation impregnation method using anhydrous zirconium chloride, ammonium persulfate, ferrous sulfate, and iron nitrate as raw materials. The binary magnetic solid acid was characterized by IR, XRD, BET, and N H₃-TPD, and was used forthe synthesis reaction of ethyl acetate. The experimental results showtha t the obtained catalyst is a solid superacid through characterization, when the addition of Fe₃O₄ is 35% and thei mpregnation concentration of ammonium persulfatei s 0.5 mol/L. The optimal pro cessconditions for the catalytic synthesis of ethyl acetate are as follows: alcohol to acid molar ratio of 3∶1, esterification time of 2 h, and solid superacid dosage of 0.5 g. The esterification rate of ethyl ace tateusing S₂O₈^2-/Fe₃O₄-ZrO₂ as catalyst is 90.25%. After four repetitions, the esterification rate ofethyl acetate can still reach 62.5%.更多还原