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酸性离子液体N-甲基吡咯烷酮硫酸氢盐催化合成乙酸乙酯

发表时间:2011-04-15  浏览量:1482  下载量:428
全部作者: 高楠楠,李文春,唐晓雪,崔巍,唐盛伟
作者单位: 四川省多相流传质与化学反应工程重点实验室,四川大学化学工程学院
摘 要: 以酸性离子液体N-甲基毗咯烷酮硫酸氢盐([Hnmp]HSO4)为催化剂,对乙酸乙酯的酯化反应进行研究,重点考察反应温度、反应时间、催化剂用量等因素对乙酸乙酯产率的影响。实验结果表明:离子液体[Hnmp]HSO4对酯化合成乙酸乙酯有着良好的催化活性,在乙醇∶乙酸为1.4∶1.0条件下,催化剂用量为乙醇的2.5%(物质的量分数),反应温度120℃,反应时间135 min,乙酸乙酯产率可达65%(质量分数)以上,且催化剂重复使用6次仍保持较高活性。
关 键 词: 化学反应工程;离子液体;乙酸乙酯;乙酸;乙醇;酯化
Title: Catalytic synthesis of ethyl acetate by an acidic ionic liquid N-methylpyrrolidone hydrosulfate
Author: GAO Nannan, LI Wenchun, TANG Xiaoxue, CUI Wei, TANG Shengwei
Organization: Laboratory of Multi-phase Mass Transfer and Chemical Reaction Engineering, School of Chemical Engineering, Sichuan University
Abstract: An acidic ionic liquid N-methylpyrrolidone hydrosulfate ([Hnmp]HSO4) was used as catalyst to synthesize ethyl acetate. The effects of different reaction parameters, such as reaction temperature, reaction time and catalyst dosage were investigated. The results showed that N-methylpyrrolidone hydrosulfate exhibited excellent catalytic activity. The yield of ethyl acetate was about 65% (mass fraction) when the reaction was conducted at optimum reaction conditions: the molar ratio of ethanol and acetic acid is 1.4∶1.0, the dosage of catalyst based on alcohol is 2.5% (molar fraction), the reaction temperature is 120℃ and reaction time is 135 min. After separation with the product and dry at high vacuum, the acidic ionic liquids recycled 6 times without significant yield decrease.
Key words: chemical reaction engineering; ionic liquid; ethyl acetate; acetic acid; ethanol; esterification
发表期数: 2011年4月第7期
引用格式: 高楠楠,李文春,唐晓雪,等. 酸性离子液体N-甲基吡咯烷酮硫酸氢盐催化合成乙酸乙酯[J]. 中国科技论文在线精品论文,2011,4(7):648-655.
 
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