KF/γ-Al_2O_3型固体超强碱催化合成肉桂酸的研究  

Study of Cinnamic Acid Catalyzed by KF/Y - A1_2O_3 Solid Superbase

作　　者：项东升[1] 

机构地区：[1]江苏省盐城纺织职业技术学院,江苏盐城224005

出　　处：《贵州化工》2005年第2期16-18,共3页Guizhou Chemical Industry

摘　　要：苯甲醛与乙酐的Perkin反应合成肉桂酸,首次采用KF/γ-Al2O3固体超强碱催化剂,降低了反应温度,明显缩短了反应时间,最佳反应条件为n(苯甲醛):n(乙酐)=1.0:3.0,反应时间1.5h,反应温度160℃,催化剂用量为苯甲醛质量的0.5%,所得的肉桂酸的产率可达81%以上。该催化剂具有较高的催化活性,易于回收,可重复使用5次以上。Perkin synthesis of cinamic acid from acetic anhydride and benzaldehyde was prepared by solid superbas (KF/γ-Al2O3) for the first time. Higher yield (81 % ) ,lower reaction temperature and shorter time were obtaine. Optimum conditions were n (benzaldehyde) :n(acetic anhydride) = 1:3,reaction time 1.5 hours,reaction temperature 160℃ and the amount of catalysts was 0.5% (base on the mass of benzaldehyde). Under these conditons the yield of cinnamic acid was 81% by GC analysis,and the catalyst can be recovered and reused for more than five times.

关 键 词：固体超强碱(KF/γ-Al2O3) 肉桂酸Perkin合成催化 

分 类 号：TQ245.12[化学工程—有机化工]