固体超强酸S_2O_8^(2-)/TiO_2催化合成乙酸正丁酯  

Synthesis of n-butyl acetate catalyzed by solid S_2O_8^(2-)/TiO_2 superacid

作　　者：李秋荣[1] 赵倩[1] 

机构地区：[1]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《工业催化》2006年第7期35-37,共3页Industrial Catalysis

摘　　要：以固体超强酸S2O82-/TiO2为催化剂、冰乙酸和正丁醇为原料合成乙酸正丁酯,考察反应条件对酯化率的影响。结果表明,最佳反应条件n(醇)∶n(酸)=1.4∶1,催化剂用量0.5 g(冰乙酸用量0.2 mol),过硫酸铵浓度0.75 mol.L-1,115~117℃反应1.5 h,酯化率达99%以上。催化剂可重复使用,且对设备腐蚀程度较小。n-Butyl acetate was synthesized from acetic acid and n-butanol using S2O8^2-/TiO2superacid as the catalyst. The influences of reaction condition on the esterification rate were investigated. The results showed that the optimum condition for synthesis of n-butyl acetate using S2O8^2-/TiO2 solid superacid was as follows： 0.2 mol acetic acid, n（ acetic acid） ： n（n-butanol） = 1.0： 1.4; 0.5 g catalyst; concentration of （ NH2 ） 2 S2O8 = 0.75 mol ·L^-1 ; reaction at 115-117 ℃ for 1.5 h. Esterification rate of over 99% was attained. The catalyst can be repeatedly used with little corrosion to equipment.

关 键 词：乙酸正丁酯 固体超强酸 正交实验 酯化 

分 类 号：TQ426.94[化学工程] TQ225.24