高纯度天然苯甲醛的制取工艺  

Process of Producing High-purity Natural Benzaldehyde

作　　者：陆顺忠[1] 黎贵卿[1] 江燕 谭桂菲 关继华[1] 

机构地区：[1]广西壮族自治区林业科学研究院国家林业局八角肉桂工技术研究中心广西特色经济林栽培与利用重点实验室,南宁530002 [2]广西分析测试研究中心,南宁530022

出　　处：《广西林业科学》2016年第1期81-84,共4页Guangxi Forestry Science

基　　金：广西林业重点项目(桂林科字[2010]第4号);广西林科院基本科研业务费专项(林科201421号);中央财政林业科技推广示范项目([2009]TG05号)

摘　　要：以天然肉桂油精馏制取的肉桂醛进行水解制取粗苯甲醛,再经过精馏得到高纯度天然苯甲醛。肉桂醛水解制取苯甲醛的最佳工艺条件为:催化剂为Na_2CO_3+H_2O_2、催化剂浓度为30%、用量为5倍肉桂醛的量,反应温度100℃、反应时间为5 h,反应后水蒸气蒸馏,得到粗苯甲醛,反应得率78.0%。然后对粗苯甲醛进行精馏,制取高纯度苯甲醛,精馏的最佳工艺条件为:精馏温度为塔釜135℃;回流比2∶1;真空度5 mm Hg。苯甲醛精馏的得率为80.5%,纯度达到99.3%。综合水解反应的得率,肉桂醛生产苯甲醛的最终得率为62.8%。High-purity natural benzaldehyde was obtained by purifying crude benzaldehyde which was gained by hydrolysis of cinnamic aldehyde purified from natural cinnamon oil. The optimum condition to obtain natural benzaldehyde from cinnamic aldehyde by hydrolysis was catalyst Na2CO3 ＋ H2O2, catalyst concentration of 30 %, 5 times amount of cinnamic aldehyde, reaction temperature 100℃, reaction time 5 h. After reaction, by steam distillation, crude benzaldehyde was obtained with 78% yield. The optimal rectification condition for crude benzaldehyde was bottoms temperature of 135℃, reflux ratio of 2： 1, vacuum degree 5 mmHg. The yield was 80. 5 %, and purity of benzaldehyde was 99.3 %. The final yield of high-purity benzaldehyde was 62.8%.

关 键 词：肉桂醛 苯甲醛 水解 精馏 

分 类 号：TQ654.2[化学工程—精细化工]