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1-甲基-3-丁基咪唑硫酸氢盐催化合成乙二醇丁醚乙酸酯

乔艳辉,滕俊江,马丽群,钱 键,吴 烨   

  1. 广东石油化工学院化学与生命科学学院,广东 茂名 525000
  • 出版日期:2011-06-05 发布日期:2011-06-05

Synthesis of 2-butoxyethyl acetate catalyzed by ionic liquid of 1-methyl-3-butylimidazolium hydrosulfate

QIAO Yanhui,TENG Junjiang,MA Liqun,QIAN Jian,WU Ye   

  1. School of Chemistry and Life Science,Guangdong University of Petrochemical Technology,Maoming 525000,Guangdong,China
  • Online:2011-06-05 Published:2011-06-05

摘要:

离子液体1-甲基-3-丁基咪唑硫酸氢盐[C4mim]HSO4催化下,以乙二醇单丁醚和冰乙酸为原料合成了乙二醇丁醚乙酸酯。探讨了催化剂用量、物料配比、反应时间、带水剂等因素对反应的影响。实验结果表明[C4mim]HSO4对合成乙二醇丁醚乙酸酯有着良好的催化活性,在催化剂用量为反应物料总质量的7%乙二醇单丁醚11.8 g乙二醇单丁醚、冰乙酸及带水剂环己烷的摩尔比为130.9,回流时间3 h的条件下产品收率达93.8%且催化剂重复使用5次仍保持较高活性。产品经核磁定性分析,纯度经气相色谱分析大于99.0%

Abstract:

2-Butoxyethyl acetate was synthesized from ethylene glycol monobutyl ether and acetic acid with catalyst of 1-methyl-3-butylimidazolium hydrosulfate. The influence of synthesis conditions on the yield was investigated. The results showed that 1-methyl-3-butylimidazolium hydrosulfate exhibited excellent catalytic activity. Under the following conditionsdosage of catalyst 7% of total mass of reactants. amount of ethylene glycol monobutyl ether11.8gmolar ratio of ethylene glycol monobutyl etheracetic acid and cyclohexane 130.9refluxing time 3 hthe yield of 2-butoxyethyl acetate was up to 93.8%. The catalyst could be reused for five times without significant yield decline. Qualitative analysis of product was conducted by NMR. Purity of the product analyzed by GC was above 99.0%.

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