[Emim]Br-FeCl_3催化合成二苯甲酮的活性与酸性的关联

Relationship Between Acidity And Catalytic Activity Of [Emim] Br-FeCl_3 For Benzophenone

以功能化酸性离子液体[Emim]Br-FeCl3为催化剂,苯和苯甲酰氯为原料酰基化合成二苯甲酮,考察了离子液体的路易斯酸强度对催化活性的影响,并对离子液体的酸强度进行了红外表征。结果表明:FeCl3含量越高,离子液体的酸强度越大,二苯甲酮催化反应活性越高,强酸位有利于该酰基化反应的进行。X=0.75时催化活性最好,达98.3%。

Friedel - Crafts acylation of benzene with benzoylchloride to produce benzophenone was studied over functionalized acidic ionic liquids [Emim]Br- FeCl3 as catalyst. Effects of Lewis acidity of [Emim]Br- FeCl3 on yield of benzophenone were investigated. And the acidity of acidic ionic liquids have been studied by IR technique using acetonitrile as a probe molecule. The experiment results indicated that acid strength of ionic liquids and catalyst activity rise with the increase of the amount of FeCl3. And strong acid sites was favorable for the production of Benzophenone. The best yield reached 98.3 % at X = 0.75.