高等学校化学学报2012，Vol.33Issue(2)：373-377,5.DOI:10.3969/j.issn.0251-0790.2012.02.028
四羰基钴/咪唑离子液体在羰基化合成丙二酸二甲酯反应中的催化性能
Catalytic Properties of Cobalt Tetracarbonyl/Imidazolium Ionic Liquids in the Synthesis of Dimethyl Manolate by Carbonylation
蒋文杰 1莫婉玲 1贾永梅 1李光兴1
作者信息
- 1. 华中科技大学化学与化工学院,武汉430074
- 折叠
摘要
Abstract
A series of [Co(C0)4]-/imidazolium ionic liquids was synthesized, and their catalytic properties were evaluated in the carbonylation reaction of methyl chloroacetate. The effect of imidazolium with different branched chains on the catalytic properties of [ Co( CO)4 ]- species was investigated. The experimental results show that l-butyl-3-methylimidazolium cobalt tetracarbonyl( [ Bmim] [ Co( C0)4 ] ) is an efficient and reusable catalyst for the carbonylation of methyl chloroacetate. At reaction conditions of pco=2 Mpa, 85 °C , and t = 3 h, the average conversion of methyl chloroacetate was 94. 3% , the average selectivity to malonic ester was 98. 5% and the average yield of dimethyl malonate was 92.9% for [ Bmim] [ Co( C0)4 ] catalyst at four recycles. Compared with the traditional Na[Co(CO)4] catalyst, [Bmim] [Co(CO)4] catalyst exhibited high activity and good reusability, which could be mostly attributed to the good stability for air of the versatile [Co(CO)4]- species at the circumstance of imidazolium ionic liquids.关键词
四羰基钴/咪唑离子液体/羰基化/丙二酸二甲酯Key words
Cobalt tetracarbonyl/ Imidazolium ionic liquid/ Carbonylation/ Dimethyl malonate分类
化学化工引用本文复制引用
蒋文杰,莫婉玲,贾永梅,李光兴..四羰基钴/咪唑离子液体在羰基化合成丙二酸二甲酯反应中的催化性能[J].高等学校化学学报,2012,33(2):373-377,5.
