Revealing the roles of hydrogen bond and Al2Cl–7 anion species and kinetics for ionic liquid catalyzed transesterification of ethylene carbonate with methanol was written by Wang, Gang;Zhao, Shirun;Yao, Haoyu. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2023.Category: imidazoles-derivatives This article mentions the following:
The co-production of di-Me carbonate (DMC) and ethylene glycol (EG) from the transesterification of ethylene carbonate (EC), which is synthesized from CO2 and ethylene oxide, with methanol has received researchers′ attention. The interaction between cation and methanol via hydrogen bond and activation of carbonyl group in EC (or 2-hydroxyethyl Me carbonate, HEMC) by metal chloride-contained anion were identified to show synergistic effects on catalytic transesterification. Not AlCl4– but Al2Cl7– anion species in AlCl3-based IL exhibited activity in this transesterification, and the content of Al2Cl7– species was observed to show linear relationship with the transformative rates of both EC and HEMC. The kinetic studies also elucidated that the rates of both EC (or HEMC) and methanol are first-order dependent on their concentrations, and the formation of HEMC intermediate was the kinetic-relevant step with the activation barrier of 92 kJ/mol. As a result, the yield and selectivity of DMC (or EG) could reach up to around 95 % and 97 % with catalysis of [MDMIM]Cl/AlCl3 with AlCl3 molar fraction of 0.67 after 12 h reaction at 140 °C, which showed higher performance than any other tested metal chloride-based IL. Besides, no decay in catalytic activity and selectivity of this IL was observed after 10 times′ recycling. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Category: imidazoles-derivatives).
1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. Imidazole derivatives generally have good solubility in protic solvents. Simple imidazole derivatives, such as 1H-imidazole, 2-methyl-1H-imidazole, and 1,2-dimethylimidazole, have very high solubility in water. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Category: imidazoles-derivatives
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem