K_2O/Al_2O_3催化丙烯酸乙酯与乙醇加成反应研究
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- 英文论文题名：Addition of Ethanol to Ethyl Acrylate Catalyzed by K_2O/Al_2O_3
- 论文作者：康婧娟 ; 汤吉海 ; 费兆阳 ; 陈献 ; 崔咪芬 ; 乔旭
- 英文论文作者：Jingjuan Kang ; Jihai Tang ; Zhaoyang Fei ; Xian Chen ; Mifen Cui ; Xu Qiao ; College of Chemical Engineering ; Nanjing Tech University ; State Key Laboratory of Materials Oriented Chemical Engineering ; Nanjing Tech University
- 年：2016
- 作者机构：南京工业大学化工学院;南京工业大学材料化学工程国家重点实验室;
- 论文关键词：丙烯酸乙酯 ; 加成反应 ; 固体碱 ; K_2O/Al_2O_3
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十三分会：绿色化学
- 语种：中文
- 分类号：O621.251
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十三分会 ; 绿色化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：437k
- 原文格式：D
- 会议级别：全国
摘要
3-乙氧基丙酸乙酯(EEP)广泛应用于电子、清洗、涂料、印刷油墨等行业。由丙烯酸乙酯与乙醇加成反应生成EEP是绿色环保工艺。近年来,固体碱因具有反应条件温和、产物易于分离以及可循环利用等优点备受研究者关注~([1])。本文以K_2O/Al_2O_3为催化剂,研究其对丙烯酸乙酯和乙醇加成反应的催化性能。从FT-IR谱图可以看出,样品经过焙烧后,1380 cm~(-1)处的O-N-O不对称伸缩振动峰明显减弱~([2]),且在1270cm~(-1)处没有出现KNO_3特征吸收峰,说明KNO_3在高温煅烧分解成K_2O。XRD结果表明K_2O成功地负载在Al_2O_3上并且没有破坏Al_2O_3结构,载体表面的Al-O-K结构为丙烯酸乙酯和乙醇的加成反应提供活性位。不同负载量的K_2O/Al_2O_3对丙烯酸乙酯和乙醇的催化结果表明,随着K_2O负载量的增加,丙烯酸乙酯转化率逐渐增加,EEP选择性高于98%。对30%K_2O/Al_2O_3催化剂,在反应温度70℃,催化剂用量为丙烯酸乙酯质量的10%,丙烯酸乙酯和乙醇摩尔比为6:1时,反应的催化转化率可达到53.5%,选择性为98.5%。
K_2O/Al_2O_3 catalysts were applied to catalyze the addition of ethanol to ethyl acrylate.FT-IR spectra indicated that KNO_3 decomposited into K_2O as the peak of O-N-O at 1380 cm~(-1) weakened and peak of KNO_3 was not observed at1270cm~(-1) after calcination.XRD results implied that the peak intensity of Al_2O_3 for K_2O/Al_2O_3 samples was stronger than that of its precursor,indicating that K_2O did not affect the structure of the support.The Al-O-K from the support provided active site for the addition reaction.The conversion of ethyl acrylate arises with increasing K_2O loading.For 30%K_2O/Al_2O_3,applying 10 wt.%catalyst to ethyl acrylate,the conversion of ethyl acrylate reached up to 53.5%and the selectivity of EEP was 98.5%in 5 h at 70 ℃ with n_(ethanol)/n_(acrylic ester) about 6.
K_2O/Al_2O_3 catalysts were applied to catalyze the addition of ethanol to ethyl acrylate.FT-IR spectra indicated that KNO_3 decomposited into K_2O as the peak of O-N-O at 1380 cm~(-1) weakened and peak of KNO_3 was not observed at1270cm~(-1) after calcination.XRD results implied that the peak intensity of Al_2O_3 for K_2O/Al_2O_3 samples was stronger than that of its precursor,indicating that K_2O did not affect the structure of the support.The Al-O-K from the support provided active site for the addition reaction.The conversion of ethyl acrylate arises with increasing K_2O loading.For 30%K_2O/Al_2O_3,applying 10 wt.%catalyst to ethyl acrylate,the conversion of ethyl acrylate reached up to 53.5%and the selectivity of EEP was 98.5%in 5 h at 70 ℃ with n_(ethanol)/n_(acrylic ester) about 6.
引文
[1]Sun,L.;Liu,X.;Zhou,H.Chem.Soc.Rev.2015,44:5092.
[2]Benjapornkulaphong,S.;Ngamcharussrivichai,C.;Bunyakiat,K.Chem.Eng.J.2009,145(3):468.
[2]Benjapornkulaphong,S.;Ngamcharussrivichai,C.;Bunyakiat,K.Chem.Eng.J.2009,145(3):468.