Synthesis of 2, 2, 4-trimethyl-1, 3-pentaerediol monoisobutyrate catalyzed by homogeneous catalysis-liquid/liquid separation catalytic system based on Bibasic sites Ionic Liquids |
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| Authors: | Shuying Zhang Jiaomei Wang Xiangxue Liu Ke Wang Chao Zhang Hongbing Song Zhenmei Guo Zhiguo Lv |
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| Affiliation: | 1. State Key Laboratory Base for Eco-chemical Engineering, School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China;2. State Key Laboratory Base for Eco-chemical Engineering, School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, 530004 China;3. School of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China |
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| Abstract: | Herein a novel homogeneous catalysis-liquid/liquid separation catalytic system based on 1, 8-diazabicyclo-[5.4.0] undec-7-ene (DBU)-functionalized, 1, 1, 3, 3-tetramethyl guanidine-functionalized and imidazolium-functionalized bibasic sites ionic liquids (BSILs) ([HDBU]IM, [Aemim]IM, [TMG]IM, [Aemim]Pro, [Aemim]Gly, [HDBU]Pro and [HDBU]Gly) with a room temperature liquid/liquid phase transition characteristic were reported. And for the first time, this novel catalytic system was employed for the synthesis of 2, 2, 4-trimethyl-1, 3-pentaerediol monoisobutyrate (CS-12), achieving homogeneous catalysis, easy recycling and long service-life of the catalyst. Additionally, the mechanism of homogeneous catalysis-biphasic separation might be explained by the solubility of reactant and product in BSILs/H2O catalytic system and the existence H-bonding between BSILs and H2O. Bibasic sites were confirmed by two endothermic peaks on the TG-DCS curve of [Aemim]IMC (the CO2 captured by [Aemim]IM). |
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| Keywords: | catalyst recycling CS-12 homogeneous catalysis ionic liquids separation |
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