Biodiesel oil is prepared from soya bean oil and methanol, the ester exchange reaction is conducted under ultrasonic conditions with alkali as the catalyst, and the effect is discussed of ultrasonic wave on the reaction.

• 摘要以大豆油和甲醇为原料制备生物柴油，酯交换反应在超声波条件下以碱作为催化剂进行，讨论了超声波对反应的影响。