Recently, by the Chinese Academy of Sciences Guangzhou Institute of Energy researchers completed a 'homogeneous solution of ionic liquids solubilizing homogeneous preparation of biodiesel method' by the national invention patent.
Biodiesel is sulfur-free and aromatics-rich, has a high cetane number and good lubricity and is a good quality clean diesel. The researchers used the ionic liquid's strong plasticity to develop a solid that is solid at room temperature and heated To above 80 ° C melt into liquid, good for grease and short-chain alcohol solubility of the ionic liquid in the preparation of biodiesel, the ionic liquid both as a catalyst and as a solubilizing agent for the reaction substrate, the reaction system was compatible ' One phase 'state, which in turn facilitates the reaction.
According to reports, after the reaction, through cooling, the ionic liquid crystal precipitation, its solubilization also will disappear, the reaction system into an ionic liquid as a solid phase, biodiesel and dissolved a small amount of unreacted raw materials Of the 'oil phase' and the methanol and glycerol 'alcohol phase' out of phase 3. The reaction system after filtration and decantation can be easily separated to solve the prior art ionic liquid poor solubility of the substrate , Ionic liquids require distillation and other issues.
The invention has the advantages of simple and convenient operation, high reaction speed, high conversion rate, easy separation and purification of products, reusable catalyst ionic liquid, low corrosiveness and no pollution to the environment, rapid preparation of biodiesel, greatly increased production efficiency and lower production cost , Has a good prospect of industrialization.
