The ultrafiltration of the crude canola oil, with membranes of 0.05 mm and 20 kDa, was effective in retaining glycerol, once the values of glycerol in the permeate varied from 0.011% to 0.013% under the conditions evaluated (Table 4). Besides that, the flux curves versus time showed a high initial flux, which remained almost constant throughout the operation, that is, the decline in flux over time was small and ranged from 14% to 26%. These results indicate that the retained phase did not cause membrane fouling. Probably, this reduction of fouling is due to the larger size of glycerol agglomerates, which are formed in the presence of free fatty acids in the oil used. This retention of the dispersed phase was confirmed by glycerol analysis (Table 4), since its highest concentration in the permeate was 0.013%