第 40 卷第 3 期 | ![](image2/wentou.gif) | Vol. 40 No. 3 | 2010 年 6 月 | Jun 2010 |
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所属栏目:有机合成原料
三氧化二锰氧化法合成对氟苯甲醛的绿色工艺 |
张启蒙,薛叙明,马金花,李玉辉,马伟刚
(常州工程职业技术学院,江苏 常州 213164) |
摘 要:二氧化锰焙烧制得的三氧化二锰作氧化剂,在硫酸溶液中氧化对氟甲苯合成对氟苯甲醛。优化工艺条件为n(对氟甲苯)∶n(三氧化二锰)=2.5∶2,反应温度80℃,硫酸浓度为55%。反应混合物颜色转变成白色即反应终点。产品收率约54%,纯度在97%以上。工艺中油-水-固三相可回收、循环使用,不产生三废,符合绿色化工生产工艺的要求。 |
关键词:氧化;对氟苯甲醛;三氧化二锰;绿色工艺 |
中图分类号:TQ244.4 文献标识码:A 文章编号:1009-9212(2010)03-0047-03 |
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Green Preparation of p-Fluorobenzaldehyde by Oxidation of p-Fluorotoluene with Mn2O3 |
ZHANG Qi-meng,XUE Xu-ming,MA Jin-hua,LI Yu-hui,MA Wei-gang
(Changzhou Insititute of Engineering Technology,Changzhou 213164,China) |
Abstract:p-Fluorotoluene was oxidized to p-fluorobenzaldehyde in sulfuric acid solution with manganese sesquioxide as the oxidant which was obtained from manganese dioxide calcination. The optimum conditions were achieved as n(p-fluorobenzene) ∶ n(Mn2O3)=2.5∶2,reaction temperature 80℃,concentration of sulfuric acid 55%. The reaction completed when the color of the mixture turns to white. The yield of the product was about 54% with purity above 97%. The three phases of oil-aqueous-solid in this process can be recovered and back to the reaction system,without any wastes disposed of. |
Key words:oxidation;p-fluorobenzaldehyde;manganese sesquioxide;green technology |
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作者简介:张启蒙(1979-),女,江苏启东人,讲师,硕士,研究方向:精细化工中间体合成。(E-mail:qmzhang@email.czie.net)
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收稿日期:010-04-26
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