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第 40 卷第 3 期Vol. 40 No. 3
2010 年 6 月Jun 2010

所屬欄目:有機合成原料

三氧化二錳氧化法合成對氟苯甲醛的綠色工藝
張啟蒙,薛敘明,馬金花,李玉輝,馬偉剛 (常州工程職業(yè)技術(shù)學(xué)院,江蘇 常州 213164)
摘 要:二氧化錳焙燒制得的三氧化二錳作氧化劑,在硫酸溶液中氧化對氟甲苯合成對氟苯甲醛。優(yōu)化工藝條件為n(對氟甲苯)∶n(三氧化二錳)=2.5∶2,反應溫度80℃,硫酸濃度為55%。反應混合物顏色轉變成白色即反應終點(diǎn)。產(chǎn)品收率約54%,純度在97%以上。工藝中油-水-固三相可回收、循環(huán)使用,不產(chǎn)生三廢,符合綠色化工生產(chǎn)工藝的要求。
關(guān)鍵詞:氧化;對氟苯甲醛;三氧化二錳;綠色工藝
中圖分類(lèi)號:TQ244.4  文獻標識碼:A  文章編號:1009-9212(2010)03-0047-03
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
作者簡(jiǎn)介:張啟蒙(1979-),女,江蘇啟東人,講師,碩士,研究方向:精細化工中間體合成。(E-mail:qmzhang@email.czie.net)
收稿日期:010-04-26
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