HY沸石催化芳环化合物的苯甲酰化反应  

Liquid phase benzoylation of aromatics over HY zeolite

作　　者：袁冰[1] 李宗石[1] 乔卫红[1] 王桂茹[1] 程侣柏[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012

出　　处：《现代化工》2006年第z1期198-200,共3页Modern Chemical Industry

摘　　要：采用廉价易得的三维大孔HY沸石替代传统均相酸催化剂催化了各种苯环和萘环化合物与苯甲酰氯的苯甲酰化反应。比较了不同活化程度的芳环化合物催化苯甲酰化活性及产物分布,n(芳环底物)∶n(苯甲酰氯)=2∶1时,在各自回流条件下反应8 h,苯环化合物的反应活性顺序为:氯苯<苯<甲苯<<二苯醚<苯甲醚=苯酚=间苯二酚,萘环化合物的反应活性顺序为:萘<2-甲基萘<2-萘甲醚=2-萘酚。对HY沸石的吡啶-红外光谱表征证明了HY沸石的表面酸中心以B酸中心为主,提出了HY沸石催化芳环苯甲酰基化反应的反应机理。A low-cost three-dimensional large pore HY zeolite was used in the liquid phase benzoylation of various aromatics with benzoyl chloride instead of classical homogeneous catalysts.The benzoylation activity and products distribution of aromatics with different substituents were compared in the presence of HY zeolite.The activity order of benzene ring compounds was chlorobenzene<benzene<toluene<<diphenyl ether<anisole=phenol=resorcinol,and that of naphthalene ring compounds was naphthalene<2-methylnaphthalene<2metoxylnaphthalene=2-naphthol when the molars of aromatic substrates and benzoyl chloride were in the ratio of 2∶1,refluxing for 8 h respectively.A plausible reaction mechanism of benzoylation of aromatics with benzoyl chloride over HY zeolite was also discussed in this paper according to the Pyridine-IR characterization result of HY zeolite.

关 键 词：HY沸石 Friedel-Crafts酰基化 二苯甲酮 苯甲酰化 

分 类 号：O643.322[理学—物理化学]