第 37 卷第 1 期 |  | Vol. 37 No. 1 | 2007 年 2 月 | Feb 2007 |
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所屬欄目:有機合成原料
己內酰胺苯磺酸類(lèi)離子液體催化甲苯選擇性硝化反應的研究 |
錢(qián)德勝1,2,程廣斌1,齊秀芳1,呂春緒1
(1. 南京理工大學(xué) 化工學(xué)院,江蘇 南京 210094;2. 巢湖學(xué)院,江蘇 巢湖 238000) |
摘 要:制備了己內酰胺對甲基苯磺酸和苯磺酸離子液體作為催化劑和溶劑,用于催化甲苯與等摩爾67%(m/m)硝酸的硝化反應,并用1H NMR進(jìn)行了表征。研究了不同的反應溫度、時(shí)間和離子液體用量及不同的離子液體等因素對甲苯硝化反應的影響。結果表明:該離子液體對甲苯的硝化有較好的對位選擇性,產(chǎn)物中鄰、對異構體質(zhì)量比為1.2,較硝硫混酸硝化(鄰、對異構體質(zhì)量比約2.0)顯著(zhù)降低,收率可達37.1%,且可重復使用。 |
關(guān)鍵詞:甲苯;離子液體;硝化反應 |
中圖分類(lèi)號:O643.32 文獻標識碼:A 文章編號:1009-9212(2007)01- 0058 - 03 |
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Regioselective Nitration of Toluene in Caprolactam-p-toluenesulfonate Ionic Liquid |
QIAN De-sheng1,2,CHENG Guang-bin1,QI Xiu-fang1,L?譈 Chun-xu1
(1. School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;2. Chaohu College,Chaohu 238000,China) |
Abstract:A novel caprolactam-cation-based Bronsted acid ionic liquids(ILs)was prepared for niration of toluene with 1 equiv of 67%(m/m)nitric acid as catalysts and characterized by NMR The effects of reaction temperature,reaction time,the amount of ionic liquid and various ionic liquids on nitration of toluene were investigated. It was found that toluene was nitrated with higher para-selectivity,and mass ratio of para-ortho isomer was 1.2,much less than 2.0 of para-ortho isomer mass ratio obtained as sulfonitric acid as catalyst. The yield of mononitro-compound could obtain 37.1% using caprolactam-para-toluene-sulfonate ionic liquid as the catalyst,and the ionic liquids can be used repeatedly. |
Key words:oluene;ionic liquid;nitration |
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基金項目:國防科工委“十五”預研資助項目(40406020103)。
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作者簡(jiǎn)介:錢(qián)德勝(1968-),男,安徽巢湖人,講師,碩士研究生,研究方向:綠色硝化反應。
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聯(lián) 系 人:程廣斌(1967-),男,副教授,博士,研究方向:主要從事精細化工產(chǎn)品的綠色合成化學(xué)和工藝學(xué)方面的研究。(E-mail:gcheng@mail.njust.edu.cn)
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收稿日期:2006-12-15
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