羰基铁催化乙炔羰化合成丙烯酸甲酯的研究

Study on the Preparation of Methyl Acrylate by Carbonylation of Acetylene Catalyzed with Iron Carbonyl

通过对羰基金属催化乙炔羰基化反应的研究,发现羰基铁具有合成丙烯酸甲酯的催化活性.并分别考察了五羰基铁的用量、CO与C2H2的摩尔比、温度、初始压力等因素对反应的影响,进而,对Fe(CO)5催化反应的活性物种进行了推测.结果表明,以甲醇为溶剂,在140℃,CO压力为4.2 MPa、n(Fe(CO)5)/n(C2H2)=0.26条件下,单一的Fe(CO)5能够催化乙炔羰化,丙烯酸甲酯的选择性可达97%.其中,n(CO)/n(C2H2)值越高,产物丙烯酸甲酯的选择性越高.

Acetylene carbonylation reaction has been preliminarily explorated with a variety of metal carbonyl,the result is that the iron carbonyl has the catalytically active. The factors of the dosage of catalyst,the molar radio of CO / C2H2,temperature,initial pressure and the role of CO were studied and the active center has also been s peculated. The results of the experiments as follows: n( Fe( CO)5) /n(C2H2) = 0. 26,the reactant methanol as solvent,the initial pressure is 4. 2 MPa and reaction temperature 140 ℃ for 6 h. Under this conditions,the s elective of methyl acrylate approached 97%. The higher n( CO) / n( C2H2) is crucial to the high selective of m ethyl acrylate.