A new solid base catalyst for the transesterification of rapeseed oil to biodiesel with methanol

► A new solid catalyst containing Ca12Al14O33 and CaO was synthetically prepared. ► The catalyst has good activity with ME (methyl ester) content reached 90%. ► The catalyst can be used for at least 7 cycles with the ME content over 87%. ► The catalyst can be separated from reaction system effectively and easily. ► This study may provide benefits for developing a continuous biodiesel process.