二元磁性S_(2)O_(8)^(2-)/Fe_(3)O_(4)-ZrO_(2)固体超强酸催化合成乙酸乙酯工艺研究  

STUDY ON THE SYNTHESIS OF ETHYL ACETATE CATALYZED BY BINARY MAGNETIC S_(2)O_(8)^(2-)/Fe_(3)O_(4)-ZrO_(2) SOLID SUPERACID

作　　者：吴田甜 刘海波[2] 闫锋[1] 孙方力 刘宇新 Wu Tiantian;Liu Haibo;Yan Feng;Sun Fangli;Liu Yuxin(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning,China;PetroChina Fushun Petrochemical Company,Fushun 113008,Liaoning,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]中国石油天然气股份有限公司抚顺石化分公司,辽宁抚顺113008

出　　处：《精细石油化工》2024年第2期34-39,共6页Speciality Petrochemicals

基　　金：国家科技重大专项课题(2016ZX05010-004-005)。

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S_(2)O_(8)^(2-)/Fe_(3)O_(4)-ZrO_(2)固体酸催化剂,利用IR、XRD、BET、NH_(3)-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Fe_(3)O_(4)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S_(2)O_(8)^(2-)/Fe_(3)O_(4)-ZrO_(2)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%。A binary magnetic S_(2)O_(8)^(2-)/Fe_(3)O_(4)-ZrO_(2) 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 NH_(3)-TPD,and was used for the synthesis reaction of ethyl acetate.The experimental results show that the obtained catalyst is a solid superacid through characterization,when the addition of Fe_(3)O_(4) is 35%and the impregnation concentration of ammonium persulfate is 0.5 mol/L.The optimal process conditions 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 acetate using S_(2)O_(8)^(2-)/Fe_(3)O_(4)-ZrO_(2) as catalyst is 90.25%.After four repetitions,the esterification rate of ethyl acetate can still reach 62.5%.

关 键 词：磁性 二元 乙酸乙酯 固体酸 氧化物 

分 类 号：O623.1[理学—有机化学]