Purification of crude biodiesel fuel by emulsification/demulsification

对碱催化合成的生物柴油粗燃料（BDF）净化所需水量进行了实验和理论研究。这与皂液种类、碱金属初始浓度和萃取温度有关。例如，在353K下，使用0.16%的水，从油酸甲酯中提取35mg-K/kg油酸钾，这是传统纯化过程中水量的1875分之一。

The amount of water needed to purify crude biodiesel fuel (BDF), which was synthesized using alkali catalysts, was studied experimentally and theoretically. It depended on the species of soap, the initial concentration of alkali metal and the extraction temperature. For example, 35mg-K/kg of potassium oleate can be extracted at 353K from methyl oleate using 0.16 % of water, which is one 1,875th of water amount in a conventional purification process.