A functionalized basic ionic liquid for synthesis of dimethyl carbonate from methanol and CO₂
2013
Sun, Jia | Lü, Bin | Wang, Xin | Li, Xin | Zhao, Jingxiang | Cai, Qinghai
A series of hydroxyl-functionalized basic ionic liquids were synthesized and used as catalysts and reaction medium for direct synthesis of dimethyl carbonate (DMC) from methanol and carbon dioxide. The hydroxyl-functionalized basic ionic liquid, namely choline hydroxide (CH) is an effective catalyst with high selectivity (95.2%) to DMC under mild conditions as compared with other similar ionic liquids. The ionic liquid can be reused three times without a significant change in its catalytic activity. Furthermore, the relationship between the catalytic reactivity and OH-functional group was discussed and the mechanism of this synthetic reaction was proposed according to the experimental results and previously reported literatures.
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