离子液体[Hnmp]HSO_4催化合成乙酸正丁酯的动力学研究  

Kinetic studies on synthesis of n-butyl acetate catalyzed by ionic liquid [Hnmp]HSO_4

作　　者：黎子进[1] 黄宝华[1] 张维刚[1] 张焜[1] 方岩雄[1] 周蓓蕾[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《工业催化》2008年第3期45-48,共4页Industrial Catalysis

基　　金：广州市科技计划(2005J1-C0231;2004J1-C0151);广东省科技计划工业攻关(2006B13801007)

摘　　要：研究了以离子液体N-甲基吡咯烷酮硫酸氢盐([Hnmp]HSO4)为催化剂时的乙酸/正丁醇液相反应动力学。实验结果表明,此反应的正、逆反应皆为表观二级反应,正、逆反应的活化能分别为74.37 kJ.mol-1和53.76 kJ.mol-1。其动力学方程为:r=6.48×108exp(-74.37/RT)[HAc][C4H9OH]-1.06×105exp(-53.76/RT)[CH3COOC4H9][H2O]。在该实验的反应条件下,其反应机理与质子酸催化酯化反应机理相似。The kinetics for liquid phase esterification of acetic acid and n-butanol catalyzed by ionic liquid of N-methyl pyrrolidonium hydrosulfate was studied. The experimental results showed that the positive and negative reaction were both apparent second-order reaction. Activation energy of the positive and neg- ative reaction was 74.37kJ·mol^-1 and 53.76kJ·mol^-1, respectively. The kinetic equation was as follows：r=6.48×10^8exp（-74.37/RT）[HAc][C4H9OH]-1.06×10^5exp（-53.76/RT）[CH3COOC4H9][H2O]. Mechanism of the reaction was similar to that catalyzed by Bronsted acid.

关 键 词：催化化学 乙酸丁酯 酯化反应 离子液体 动力学 反应机理 

分 类 号：O643.36[理学—物理化学] O643.1[理学—化学]