Production of biodiesel from Jatropha oil catalyzed by nanosized solid basic catalyst

► Nanosized base Mg-Al calcined hydrotalcite catalyst was synthesized. ► The catalyst was successfully used to produce high qualified biodiesel from Jatropha oil under ultrasonic radiation. ► Maximum biodiesel yield of 95.2% was achieved at optimized condition. ► The catalyst can be reused for 8 times.