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将一系列酸性、碱性和中性的功能化离子液体用于催化甘油和尿素合成甘油碳酸酯.结果表明,中性离子液体表现出更高的催化活性.离子液体阳离子和阴离子的协同效应促进了反应的进行,离子液体阳离子的正电性活化尿素,阴离子的负电性活化甘油,并且催化剂酸碱位点的平衡对催化反应过程也有一定的影响.此外,离子液体可以实现回收利用至少五次,且催化活性基本不变.采用功能化离子液体替代传统金属催化剂,减少了不可再生资源的利用,且所用原料为廉价易得的生物基原料,过程中也不使用有机溶剂,环境友好.
A series of acidic, basic and neutral functional ionic liquids were used to catalyze glycerol and urea to synthesize glycerol carbonate.The results showed that the neutral ionic liquid showed higher catalytic activity.The synergistic effect of ionic liquid cation and anion promoted The progress of the reaction, positive ionic activated cationic urea cation, negative anionic activated glycerol, and the catalyst acid-base site balance of the catalytic reaction process also has some effect.In addition, the ionic liquid can achieve recycling at least five times , And the catalytic activity is basically the same.Using functionalized ionic liquid instead of traditional metal catalyst can reduce the use of non-renewable resources, and the raw materials used are cheap and easy-to-obtain bio-based raw materials, and do not use organic solvents in the process.