溶剂对氧化苯乙烯液相重排制备苯乙醛反应的影响  

Effect of Solvents on the Liquid-Phase Rearrangement of Styrene Oxide to Phenylacetaldehyde

作　　者：谭丽媛[1] 王日杰[1] 杨晓霞[1] Tan Liyuan Wang Rijie Yang Xiaoxia(School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, Chin)

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2017年第1期25-29,共5页Chemical Industry and Engineering

摘　　要：以HZSM-5分子筛为催化剂,探讨了不同极性的溶剂对氧化苯乙烯液相催化重排制备苯乙醛反应的影响。结果表明,极性最强的DMF溶剂易吸附在分子筛表面,导致催化剂失活,使反应不能进行;极性稍弱的甲醇、乙醇和丙酮溶剂,加快了重排反应的速率,但易与苯乙醛反应生成副产物;弱极性和非极性溶剂性质稳定,能有效抑制催化剂积碳失活,其中1,2-二氯乙烷是氧化苯乙烯液相重排反应最适宜的溶剂。The effect of solvents with variant polarity was investigated in liquid-phase rearrangement of styrene oxide to phenylacetaldehyde over HZSM-5 zeolite. The experimental results showed that DMF,which possessed the strongest polarity,could be easily adsorbed on the surface of zeolites and resulted in quick deactivation of the catalyst. Other solvents with weaker polarity could improve the reaction rate effectively,while by-products were generated by reacting with phenylacetaldehyde. The weakest polar or nonpolar solvents were more stable,owing to the suppression of carbon deposits. Among all the solvents,1,2-dichloroethane was proven to be the most suitable one for the reaction.

关 键 词：氧化苯乙烯 苯乙醛 ZSM-5 溶剂效应 

分 类 号：TQ032[化学工程]