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Nano-porous Composites Based on Heteropolyacid Functionalized Ionic Liquid: Synthesis, Characterization, and Catalytic Performance in Esterification
Fu-dong Zhou,Wei Chu*,Xiao-yan Dai,Shi-zhong Luo
Author NameAffiliationE-mail
Fu-dong Zhou Department of Chemical Engineering, Sichuan University, Chengdu 610065, China chuwei1965_scu@yahoo.com 
Wei Chu* Department of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaKey Lab of Green Chemistry and Technology of Ministry of Education, Sichuan University, Chengdu 610064, China chuwei1965_scu@yahoo.com 
Xiao-yan Dai Department of Chemical Engineering, Sichuan University, Chengdu 610065, China chuwei1965_scu@yahoo.com 
Shi-zhong Luo Department of Chemical Engineering, Sichuan University, Chengdu 610065, China chuwei1965_scu@yahoo.com 
Abstract:
Functionalized ionic liquid samples (bmim-PW12) were synthesized by 1-butyl-3-methyl-imidazolium bromide (bmimBr) and 12-phosphotungstic heteropolyacid (PW12). The sam-ples were annealed at 100-450 oC and were characterized by Fourier transform infrared spec-troscopy, X-ray diffraction, scanning electron microscope, thermal gravity-DTG, brunauer emmett teller, and NH3-temperature programmed desorption. The results showed that the bmim-PW12 samples were crystal and maintained intact Keggin structure. The organic parts of those samples were partly decomposed at a temperature more than 350 oC. The sample annealed at 400 oC exhibited nano-porous structure, strong acidity, and excellent catalytic activity on the esterification of n-butanol with acetic acid. The higher ester yield was ob-tained when the mass ratio of catalyst over the reactants amount was 5% for bmim-PW12 catalyst annealed at 400 oC.
Key words:  Ionic liquid, 1-Butyl-3-methyl-imidazolium bromide, Phosphotungstic het-eropolyacid, Annealing treatment, Esterification
FundProject:
纳米多孔离子液体复合材料的合成及其在酯化反应中的应用
周夫东,储伟*,戴晓雁,罗仕忠
摘要:
以溴化1-丁基-3-甲基咪唑离子液体和磷钨杂多酸(H3PW12O40)为原料制备了杂多酸功能化离子液体复合材料催化剂(bmim-PW12),并用于催化乙酸与正丁醇酯化合成乙酸正丁酯的反应,考察了bmim-PW12不同热处理温度对其结构以及催化酯化反应活性的影响.结果表明,bmim-PW12在500 oC热处理时杂多酸 阴离子仍保持Keggin结构,但有机阳离子在350 oC以上发生了部分分解.bmim-PW12在400 oC热处理具有纳米多孔结构和较大的酸强度,且在丁醇与乙酸酯化合成乙酸丁酯反应中,具有较高的催化活性和较好的重复使用性能.
关键词:  离子液体,溴化1-丁基-3-甲基咪唑离子液体,磷钨杂多酸酸,热处理温度,酯化反应
DOI:10.1088/1674-0068/23/04/473-478
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