吡啶为助剂合成甲酸甲酯的动力学研究  

Study on Kinetics of Synthesis of Methyl Formate Using Pyridine as a Promoter

作　　者：方智利[1] 章江洪[2] 陈梁[3] 宋麟[3] 

机构地区：[1]华东交通大学基础学院,江西南昌330013 [2]昆明理工大学理学院,云南昆明650093 [3]昆明理工大学生化学院,云南昆明650093

出　　处：《化学反应工程与工艺》2003年第4期306-310,共5页Chemical Reaction Engineering and Technology

摘　　要：　在60～90℃对以吡啶为助催化剂由一氧化碳合成甲酸甲酯的反应进行了动力学研究。结果表明该反应为2级反应,速率方程rυ=-dpco/dt=k[MOH]pco,无助催化剂时反应活化能Ea=67.63kJ/mol,反应速率常数k=9.66×106exp(-67.63×103/RT)(mol-1·L·min-1);当有助催化剂存在时,反应活化能为Ea=61.19kJ/mol,反应速率常数k=8.82×106exp(-61.19×103/RT)(mol-1·L·min-1)。并对助催化剂吡啶的助催化机理进行了探讨。Kinetics of synthesis of methyl formate from carbon monoxide and methanol with (MeONa) as catalysts and pyridine as promoters in a batch reactor was studied. The experiment results demonstrated that the reaction could be accelerated when pyridine is used as a promoter, and can decrease activation energy up to 6.44kJ/mol. The results also showed the reaction is two order-reaction and a general reaction equation was found by:r_υ=-dp_(co)/dt=kp_(co)in the formula:k=9.66×10~6 exp(-67.63/RT)k=8.82×10~6 exp(-61.19/RT)Moreover, the mechanism of the reaction with pyridine promoter was discussed preliminarily.

关 键 词：吡啶 助剂 合成 甲酸甲酯 动力学 一氧化碳 甲醇钠 

分 类 号：TQ225.241[化学工程—有机化工]