CH_3COOH/H_2O_2体系氧化苯乙烯制苯甲醛  

Oxidation of styrene to benzaldehyde with CH_3COOH/H_2O_2 system

作　　者：孙琪[1] 张欣欣[1] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2014年第4期515-518,共4页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(21173110)

摘　　要：在合适条件下CH3COOH与H2O2反应生成过氧乙酸(CH3COOOH),过氧乙酸氧化苯乙烯生成苯甲醛.研究了反应温度、反应时间、过氧化氢用量、加料顺序及添加乙腈和水等对CH3COOH/H2O2体系氧化苯乙烯制苯甲醛反应的影响.结果表明:当苯乙烯为0.5mL,乙酸5mL,H2O22mL,反应时间为5h,反应温度为60℃,苯乙烯的转化率可以达到99.6%,苯甲醛的过氧乙酸选择性大于60%.The preparation of benzaldehyde by oxidizing styrene in the CH3COOH/H2O2 system has been studied .Firstly ,the condition for the oxidation of styrene in the CH3 COOH/H2 O2 system has been optimized .Under the condition of styrene 0 .5 mL ,acetic acid 5 mL ,n（H2 O2 ）∶n（styrene）=4 .5 ,60 ℃ ,5 h ,the conversion rate of styrene and the selectivity of benzaldehyde are 99 .6% and 60% .T he selectivity of phenylacetaldehyde decreases ,the selectivity of benzaldehyde increases w hen introducing a certain amount of solvent ,acetonitrile or water into the CH3COOH/H2O2 system .

关 键 词：苯乙烯 苯甲醛 乙酸 过氧化氢 

分 类 号：O643.322[理学—物理化学]