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生物质化学工程

生物质化学工程 ›› 2009, Vol. 43 ›› Issue (2): 23-26.

• 论文 • 上一篇    下一篇

苯甲醛氧化制备苯甲酸的研究

谢水龙1, 肖健1, 刘先章1,2   

  1. 1. 厦门劲美生物科技有限公司, 福建, 厦门, 361003;2. 中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放性实验室, 江苏, 南京, 210042
  • 收稿日期:2008-10-10 修回日期:1900-01-01 出版日期:2009-03-30 发布日期:2009-03-30
  • 通讯作者: 刘先章,研究员,主要研究领域为天然产物化学.

Study on Preparation of Benzoic Acid by Catalytic Oxidation of Benzaldehyde

XIE Shui-long1, XIAO Jian1, LIU Xian-zhang1,2   

  1. 1. Xiamen Kimy Biotechnology Co., Ltd., Xiamen 361003, China;2. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, China
  • Received:2008-10-10 Revised:1900-01-01 Online:2009-03-30 Published:2009-03-30

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摘要： 以氧气为氧化剂,在六水合氯化钴催化剂作用下,催化氧化苯甲醛制备苯甲酸,分别考察了温度、溶剂量、催化剂量、乳化剂量对苯甲酸收率的影响.在苯甲醛:水:乳化剂:六水合氯化钴质量比为75:50:37.5:0.075,反应温度75～80℃,反应时间6 h,氯气流量0.3 L/min下反应,产率在85%以上,用水进行两次重结晶,得率为60%～65%.

关键词: 苯甲醛, 苯甲酸, 催化氧化

Abstract: Benzoic acid was prepared by catalytic oxidation of benzaldyde with oxygen in the presence of cobalt chloride hexahydrate. The effects of the reaction temperature, dosage of solvent, catalyst and emulsifier on the yield of benzoic acid were studied. The yield was over 85% at the condition of mass ratio of benzaldehyde, water, emulsifier, and cobalt hexahydrate 75:50:37.5:0.075,reaction temperature 75-80℃, reaction time 6h, oxygen flow rate 0.3 L/min. The yield of benzoic acid was 60%-65% after twice recrystallization with water.

Key words: benzaldehyde, benzoic acid, catalytic oxidation

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