Ultrasonic-assisted reactive-extraction is a fast and easy method for biodiesel production from Jatropha curcas oilseeds.

The alkyl ester of vegetable oil represents as an alternative fuel for diesel engines which is to reduce the cost of biodiesel by increasing the efficiency of biodiesel production by single step reaction i.e. production of biodiesel by combing extraction of oil from oilseed and reaction of extract with alcohol by using ultrasonication. This process is called ultrasonic reactive-extraction. It consists of the investigation of the optimum conditions i.e. seed size >1-<2, molar ratio oilseed to methanol 1:100, catalyst concentration 1.5wt% of oilseed, reaction time 20min and ultrasonic amplitude 50%, cycle 0.3s gives the maximum conversion.