中孔分子筛Zr-Mo-MCM-41催化2-甲氧基萘傅-克酰基化反应

Mesoporous Molecular Sieves Zr-Mo-MCM-41 as Catalysts for the Friedel-Crafts Acylation of 2-Methoxynaphthalene

采用水热合成法制得Mo MCM 41 ,以Zr(SO4) 2 为Zr源 ,制备中孔分子筛Zr Mo MCM 41。采用XRD、FT IR及Hammett指示剂法对其结构及酸强度进行表征。将其用于催化 2 甲氧基萘与乙酸酐的傅 克酰基化反应 ,考察了反应温度、催化剂用量、酰化剂用量、反应时间等因素对该反应转化率及选择性的影响 ,得到了较适宜的工艺条件 :2 甲氧基萘 3.95g ,Zr Mo MCM 41 1 .5g ,2 甲氧基萘与乙酸酐摩尔比为 1∶8,反应温度 1 2 0℃ ,反应时间 2 4h ,2 甲氧基萘的转化率可达 80 % ,催化剂对 1 乙酰基 2 甲氧基萘的选择性可达 95 %。此外还考察了催化剂的重复使用情况。

A kind of mesoporous sieve Zr-Mo-MCM-41 was prepared.The structure and acid properties of the mesoporous sieve were investigated by XRD, FT-IR and Hammett indicator.The mesoporus sieve was used to catalyze the Friedel-Crafts acylation between 2-methoxynaphthalene and acetlc anhydride,and the effects of factors such as temperature, the amount of catalyst,amount of acylation agent and reaction time on reaction results were examined.The suitable conditions were as following:2-methoxynaphthalene 3.95 g,Zr-Mo-MCM-41 1.5 g,molar ratio of 2-methoxynaphthalene to acetic anhydride 1∶8,reaction temperature 120 ℃ and reaction time 24 h.Under above conditions,conversion of 2-methoxynaphthalene was 80 %, selectivity to 1-acyl-2-methoxynaphthalene was 95 %.