摘要
以苯甲醛为原料,过氧化氢作氧化剂,1∶12磷钨杂多酸哌啶盐为催化剂,一步反应制得苯甲酸。考察了反应温度、物料比、催化剂用量及反应时间对反应的影响。反应产物抽滤烘干后,通过测熔点来进行分析。采用正交实验法对苯甲酸的合成路线进行优化设计,得出了最优化工艺条件:温度75℃,V(苯甲醛)∶V(过氧化氢)=1∶3.0,m(催化剂)=0.4 g,反应时间5 h,苯甲酸产率达96.7%。
The benzoic acid was directly synthesized from benzaldehyde,using 1∶12 phosphotungstic acid salt piperidine as catalyst,hydrogen peroxide as oxidant.The effects of molar ration,reaction temperature,the amount of catalyst and reaction time were investigated.After filtration and drying,the chemical structure of the reaction product was analyzed by IR and measuring melting point.The synthetic route of benzoic acid was optimally designed by orthogonal experiment,the optimized preparation conditions were given by dealing with the experiment data：reaction temperature is about 75℃,V（benzaldehyde）/V（hydrogen peroxide）=1∶3.0,catalyst amount is 0.4g,reaction time is 5 hours,the local synthetic yield reached 96.7%.
出处
《化工科技》
CAS
2010年第6期25-28,共4页
Science & Technology in Chemical Industry
关键词
苯甲酸
过氧化氢
苯甲醛
1∶12磷钨杂多酸哌啶盐
Benzoic acid
Hydrogen peroxide
Benzaldehyde
1∶12 Phosphotungstic acid salt piperidine
