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Olefin oligomerization via new and efficient Bronsted acidic ionic liquid catalyst systems 被引量:3
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作者 Guoqin Wang heyuan song +2 位作者 Ruiyun Li Zhen Li Jing Chen 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第6期1110-1120,共11页
Olefin oligomerization reaction catalyzed by new catalyst systems(a Br?nsted‐acidic ionic liquid as the main catalyst and tricaprylylmethylammonium chloride as the co‐catalyst) has been investigat‐ed. The synthe... Olefin oligomerization reaction catalyzed by new catalyst systems(a Br?nsted‐acidic ionic liquid as the main catalyst and tricaprylylmethylammonium chloride as the co‐catalyst) has been investigat‐ed. The synthesized Br?nsted acidic ionic liquids were characterized by Fourier transform infrared spectroscopy(FT‐IR), ultraviolet‐visible spectroscopy(UV), ^1H nuclear magnetic resonance(NMR), and ^13 C NMR to analyze their structures and acidities. The influence of different ionic liquids, ionic liquid loading, different co‐catalysts, catalyst ratios(mole ratio of ionic liquid to co‐catalyst), reac‐tion time, pressure, temperature, solvent, source of reactants, and the recycling of catalyst systems was studied. Among the synthesized ionic liquids, 1‐(4‐sulfonic acid)butyl‐3‐hexylimidazolium hydrogen sulfate([HIMBs]HSO4) exhibited the best catalytic activity under the tested reaction con‐ditions. The conversion of isobutene and selectivity of trimers were 83.21% and 35.80%, respec‐tively, at the optimum reaction conditions. Furthermore, the catalyst system can be easily separated and reused; a feasible reaction mechanism is proposed on the basis of the distribution of experi‐mental products. 展开更多
关键词 Bronsted acidic ionic liquid OLEFIN OLIGOMERIZATION CATALYSIS CO-CATALYST
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Brφsted-acidic ionic liquids as efficient catalysts for the synthesis of polyoxymethylene dialkyl ethers 被引量:3
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作者 heyuan song Meirong Kang +3 位作者 Fuxiang Jin Guoqin Wang Zhen Li Jing Chen 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第5期853-861,共9页
Acetalation of formaldehyde(HCHO)with dialkyl formal or aliphatic alcohol to prepare polyoxymethylene dialkyl ethers(RO(CH2O)nR,n≥1)catalyzed by Br?nsted‐acidic ionic liquids has been developed.The correlation betwe... Acetalation of formaldehyde(HCHO)with dialkyl formal or aliphatic alcohol to prepare polyoxymethylene dialkyl ethers(RO(CH2O)nR,n≥1)catalyzed by Br?nsted‐acidic ionic liquids has been developed.The correlation between the structure and acidity activity of various ionic liquids was studied.Among the ionic liquids investigated,1‐(4‐sulfonic acid)butyl‐3‐methylimidazolium hydrogen sulfate([MIMBs]HSO4)exhibited the best catalytic performance in the reaction of diethoxymethane(DEM1)with trioxane.The influences of ionic liquid loading,molar ratio of DEM1to HCHO,reaction temperature,pressure,time,and reactant source on the catalytic reaction were explored using[MIMBs]HSO4as the catalyst.Under the optimal conditions of n([MIMBs]HSO4):n(DEM1):n(HCHO)=1:80:80,140°C,and4h,the conversion of HCHO and selectivity for DEM2?8were92.6%and95.1%,respectively.The[MIMBs]HSO4catalyst could be easily separated and reused.A feasible mechanism for the catalytic performance of[MIMBs]HSO4was proposed. 展开更多
关键词 Acetalation reaction Polyoxymethylene dialkyl ether Diethoxymethane FORMALDEHYDE Bronsted乚acidic ionic liquid
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离子液体固载化及应用研究 被引量:9
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作者 康美荣 金福祥 +2 位作者 李臻 宋河远 陈静 《化学进展》 SCIE CAS CSCD 北大核心 2020年第9期1274-1293,共20页
离子液体固载化是将离子液体通过物理吸附或化学键合的方法负载到不同的载体上,得到一种新型固体材料,兼具了离子液体与载体的特征,能够显著提升离子液体的利用率,解决离子液体黏度大、传质及分离困难等问题,拓展了离子液体的应用领域... 离子液体固载化是将离子液体通过物理吸附或化学键合的方法负载到不同的载体上,得到一种新型固体材料,兼具了离子液体与载体的特征,能够显著提升离子液体的利用率,解决离子液体黏度大、传质及分离困难等问题,拓展了离子液体的应用领域。本文根据不同的载体类型,综述了近年来离子液体固载化的研究进展及应用情况,总结了不同载体的优缺点及现阶段研究和应用发展中存在的一些问题,并对固载化离子液体的应用前景进行了展望。 展开更多
关键词 离子液体 固载化 载体 多相催化 复合材料
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