酸处理活性炭催化臭氧氧化肉桂醛为苯甲醛

Acid treated Activated Carbon Catalyzed Ozonation of Cinnamaldehyde to Benzaldehyde

摘要:

以经酸处理的活性炭为催化剂，进行多相催化臭氧氧化肉桂醛为苯甲醛的研究。考察了溶剂种类、乙醇用量、活性炭用量、臭氧流量及臭氧化反应温度对反应的影响。结果表明，活性炭能够明显提高臭氧的利用率，臭氧利用率从单独使用臭氧时的53.5%提高到67.4%。最佳反应条件为：无水乙醇为溶剂，无水乙醇/肉桂醛质量比值为3，氧气流量为800 mL/min（臭氧流量为0.71 g/h），活性炭/肉桂醛质量比值为0.01，在0 ℃下臭氧化反应2 h，然后进行还原反应，苯甲醛收率为44.0%。

Abstract:

Acid treated activated carbon was used as a catalyst for heterogeneous catalytic ozonation of cinnamaldehyde to natural benzaldehyde. The effects of the solvents type, dosage of ethanol and activated carbon, ozone flow rate, and ozonation reaction temperature on the reaction of catalytic ozonation of cinnamaldehyde to benzaldehyde on activated carbon were investigated. The results show that the utilization of ozone can be improved by using activated carbon as catalyst, and the utilization of ozone was increased from 53.5% of the ozone alone to 67.4%. The optimal reaction conditions were as follows: ethanol was used as solvent, the mass ratio of ethanol to cinnamaldehyde was 3, oxygen flow rate was 800 mL/min (ozone flow rate was 0.71 g/h ), the mass ratio of activated carbon to cinnamaldehyde was 0.01, reacted at 0 ℃ for 2 h, the yield of benzaldehyde was 44.0%.