摘要
以K2O/Al2O3固体碱为催化剂,催化苯甲醛与醋酐反应合成了肉桂酸。探讨了催化剂用量、反应温度、反应时间、反应物配比、不同种类和不同方法制备的催化剂对产品收率的影响。结果表明,以K2O/Al2O3为催化剂的最佳反应条件为:固体碱用量5.0 g,反应时间1 h,反应温度160℃,苯甲醛0.05 mol,苯甲醛与醋酐摩尔比1∶3。最佳合成条件下肉桂酸产率达65.4%。不同方法制得的催化剂以微波制备的较好。
Cinnamic acid is synthesized from benzaldehyde and acetic anhydride using solid base K2O/Al2O3 as catalyst. The effect of different reaction condition on the yield has been discussed. The results show that the optimum reaction conditions are as follows： benzaldehyde is 0.05 mol, molar ratio of benzaldehyde to acetic anhydride is 1 ： 3, the amount of solid base catalyst K2O/Al2O3 is 5.0 g,reaction temperature is 160℃, reaction time is 1 h. The yield of cinnamic acid is 65.4% under the above experimental conditions. The microwave method is superior to dipping method for preparation of solid base catalyst.
出处
《化学与生物工程》
CAS
2008年第1期18-20,共3页
Chemistry & Bioengineering
关键词
肉桂酸
固体碱
苯甲醛
醋酐
cinnamic acid
solid base
benzaldehyde
acetic anhydride
