Effect of phase separation temperature on ester yields from ethanolysis of rapeseed oil in the presence of NaOH and KOH as catalysts

► Transesterification of rapeseed oil under two homogeneous catalysts. ► The dependence of ethyl ester losses in the side product on separation temperature. ► The losses decrease with increasing separation temperature (ester yield increasing). ► The ethyl ester bound in the glycerol phase can be exacted by its heating.