第 37 卷第 6 期 |  | Vol. 37 No. 6 | 2007 年 12 月 | Dec 2007 |
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所屬欄目:有機合成原料
離子液體催化反應精餾合成乙酸乙酯 |
尉志蘋(píng),王少君,曲豐作
(大連工業(yè)大學(xué) 化工與材料學(xué)院,遼寧 大連 116034) |
摘 要:利用1-己基吡啶四氟硼酸鹽離子液體作溶劑和催化劑,在催化反應精餾塔內合成乙酸乙酯。結果表明該離子液體具有催化活性,反應的選擇性為100%,分離后的1-已基吡啶四氟硼酸鹽離子液體重復使用5次,其活性沒(méi)有明顯變化?疾炝嘶亓鞅、進(jìn)料比、溶劑和催化劑用量對酯化反應結果的影響,優(yōu)化了反應的工藝條件,適宜的反應條件為:物料比n(乙酸) ∶ n(乙醇) =1.1 ∶ 1,離子液體用量n(乙酸) ∶ n(離子液體)=8 ∶ 1,回流比為3。 |
關(guān)鍵詞:離子液體;乙酸乙酯;酯化反應;反應精餾 |
中圖分類(lèi)號:TQ032.42 文獻標識碼:A 文章編號:1009-9212(2007)06- 0039-03 |
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Synthesis of Ethyl Acetate by Ionic Liquid Using Catalytic Reaction Distillation |
WEI Zhi-ping, WANG Shao-jun , QU Feng-zuo
(Department of Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China) |
Abstract:Ethyl acetate is synthesized in the reactive distillation column using ionic liquid of 1-hexyl-pyridinium tetrafluoroborate(HPyBF4)as catalyst and solvent. The result shows that HPyBF4 has catalytic activity and 100% selectivity in esterification,but there is no significant change in activity of HPyBF4 after reusing 5 times in esterification. The influences of reflux ratio,feed ratio,amount of HPyBF4 on esterification are studied. The optimal conditions is as follow: acetic acid: ethanol =1.1 ∶ 1,acetic acid:HPyBF4=8 ∶ 1,and reflux ratio=3. |
Key words:ionic liquid;ethyl acetate;esterification;reactive distillation |
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基金項目:國家重點(diǎn)基礎研究發(fā)展計劃(973計劃)資助項目(2003CB615805)。
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作者簡(jiǎn)介:尉志蘋(píng)(1972-),女,吉林松原人,工程師,研究方向:環(huán)境綠色化學(xué)。(E-mail:weizp@dlpu.edu.cn)
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收稿日期:2007-07-23
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