Esterification of oleic acid using 12-tungstophosphoric supported in flint kaolin of the Amazonia

► Efficient impregnation of supported HPW on kaolin flint were in acetonitrile. ► Esterification using catalyst with 60 wt% HPW showed better conversion. ► Effect of time and temperature were studied for catalyst with 20 wt% HPW. ► Esterification of oleic acid reactor was adjusted to apparent first order kinetics. ► Assays were performed in a batch reactor whose contact time is the reaction time.