羰基合成醋酐反应中催化剂的作用  

The Function of Catalysts in Carbonylation of Methyl Acetate

作　　者：金柳伟 陈墨庆 崔伟 徐庆 

机构地区：[1]上海焦化有限公司,上海200241

出　　处：《上海化工》2005年第11期21-24,共4页Shanghai Chemical Industry

摘　　要：对醋酸甲酯羰基化制备醋酐的反应机理作了分析,对主催化剂和助催化剂的作用作了描述。在整个催化循环中,碘甲烷氧化加成到二碘二羰基铑是反应的控制步之一,由于碱金属的参与,改变了反应历程,可以认为反应仅受限于铑和碘甲烷的浓度。The mechanism for earbonylation of methyl acetate to acetie anhydride is studied and the function of main eatalysts and sub-eatalysts are described in this article. In the catalytic cycle,one ot the rate-determining steps is the oxidative addition of methyl iodide to [Rh（CO）2I2]^-. When introducing cationic promoter, the reaction process is changed and it can he considered that the reaction rate is only limited by the coneentration of rhodium and methyl iodide.

关 键 词：醋酐 羰基化 反应机理 

分 类 号：O643.32[理学—物理化学]