3,5-二羟基苯甲酸转移加氢动力学  

Macrokinetics of Transfer Hydrogenation of 3,5-dihydroxybenzoic Acid

作　　者：郑纯智[1] 张继炎[1] 王日杰[1] 

机构地区：[1]天津大学化工学院催化科学与工程系,天津300072

出　　处：《化学反应工程与工艺》2005年第1期1-5,共5页Chemical Reaction Engineering and Technology

摘　　要：研究了3,5-二羟基苯甲酸(DHB)为原料采用催化转移加氢法合成3,5-二氧代环己烷羧酸(DOC)的过程,得到了以5%Pd/C为催化剂、甲酸钠为氢供体的3,5-二羟基苯甲酸转移加氢宏观反应动力学。研究发现,在实验条件下原料3,5-二羟基苯甲酸的反应级数为0,供体甲酸钠和催化剂分别为一级;当氢供体大量过量时,3,5-二羟基苯甲酸的吸附速率是反应的控速步骤,初步探讨了反应过程的机理。Macrokinetics formula of catalytic transfer hydrogenation reaction of 3,5-dihydroxybenzoic acid with sodium formate as donor and 5%Pd/C as catalyst was obtained. It was found that the reaction to 3,5-dihydroxybenzoic acid, sodium benzoate and catalyst are zero-, one-and one-order respectively. The adsorption rate of 3,5-dihydroxybenzoic acid is control step of the reaction when mole ratio of donor to 3,5-dihydroxybenzoic acid was too high. The mechanism of CTH of 3,5-dihydroxybenzoic acid was put forward.

关 键 词：二羟基苯甲酸 加氢动力学 宏观反应动力学 环己烷羧酸 催化转移 Pd/C 实验条件 反应级数 吸附速率 反应过程 催化剂 甲酸钠 加氢法 二氧代 供体 原料 

分 类 号：TQ245.4[化学工程—有机化工] TQ333.7