甲酸-H_2O_2物系氧化苯乙烯制苯甲酸  

Oxidation of styrene by formic acid-H_2O_2 system

作　　者：孙琪[1] 王丽润[1] 崔岩[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）》2011年第2期203-205,共3页Journal of Liaoning Normal University:Natural Science Edition

基　　金：辽宁省高校创新团队项目(2008T106)

摘　　要：在无催化剂的条件下,采用不同物系进行了苯乙烯氧化反应制得苯甲酸的研究.考察了物系种类、H2O2用量、反应温度、反应时间、反应物的加入方式等因素对该反应的影响.结果表明:在甲酸-H2O2物系中,苯乙烯被氧化生成苯甲酸.在此物系中,随甲酸用量的增加,反应时间的延长,反应温度的升高,苯乙烯的转化率升高,苯甲酸的选择性先增加后减小;加料顺序和酸的种类也影响苯乙烯氧化的转化率和选择性.氧化苯乙烯制苯甲酸反应的优化条件为:甲酸-H2O2物系,采用先加入苯乙烯和甲酸再滴加H2O2的加料方式,过氧化氢38.4 mmol,苯乙烯6.4 mmol,甲酸38.4 mmol,反应温度80℃,反应时间5 h.在此条件下,苯乙烯的转化率为100%,苯甲酸的选择性达到91.4%.Oxidation of styrene was studied using different systems in the absence of catalyst.Effects of the composition of the system,formic acid-H2O2 mole ratio,reaction temperature,reaction time and operating procedures on oxidation of styrene were investigated.The results indicated that the oxidation production of styrene was benzoic acid in formic acid-H2O2 system.With the increase in H2O2 dosage,reaction time and reaction temperature,the conversion of styrene increased and the selectivity to benzoic acid increased firstly and then decreased.The conversion and selectivity of styrene oxidation were also influenced by operating procedures and acids.Under the optimal conditions for styrene oxidation： H2O2 38.4 mmol（adding H2O2 in drop to the mixture of styrene and formic acid）,styrene 6.4 mmol,formic acid 38.4 mmol,80 ℃ and 5 h,the conversion of styrene and selectivity to benzoic acid were 100% and 91.4%,respectively.

关 键 词：甲酸 过氧化氢 苯乙烯 苯甲酸 氧化反应 

分 类 号：O643.322[理学—物理化学]