纳米固体超强酸催化剂SO_4^(2-)/α-Fe_2O_3的制备及其催化合成乙酸乙酯  

Preparation of nanoparticle SO_4^(2-)/α-Fe_2O_3 solid superacid catalysts and their catalytic properties for synthesis of ethyl acetate

作　　者：谢小莉[1] 焦华[2] 

机构地区：[1]西北化工研究院,陕西西安710061 [2]渭南师范学院,陕西渭南714000

出　　处：《工业催化》2013年第12期68-71,共4页Industrial Catalysis

摘　　要：采用水热法合成纳米方块和纳米微球固体超强酸催化剂SO2-4/α-Fe2O3,研究超强酸的制备条件,并以此为催化剂,考察催化合成乙酸乙酯的条件。结果表明,焙烧温度450℃制备的纳米微球固体超强酸催化剂SO2-4/α-Fe2O3具有较好的催化活性,催化合成乙酸乙酯的条件为:n(酸)∶n(醇)=2.5∶1,反应时间2 h,反应温度95℃,酯化率为91.5%。Nanoparticle SO42-/α-Fe2O3 solid superacid catalysts with the crystal structures of nanocubes and hollow microspheres were synthesized via a hydrothermal route. The preparation condition of SO42-/α-Fe2O3 solid superacid catalysts and the synthesis condition of ethyl acetate over the as-prepared catalysts were investigated. The results showed that the catalyst with the crystal structure of hollow microspheres calcined at 450 ℃ possessed better catalytic activity, and ethyl acetate yield of 91.5 % was obtained under the appropriate reaction condition as follows ： n （acid） ： n （ alcohol ） = 2.5： 1, reaction time 2 h,and reaction temperature 95 ℃.

关 键 词：精细化学工程 纳米固体超强酸 酯化反应 乙酸乙酯 

分 类 号：TQ225.241[化学工程—有机化工] TQ426.6