Importantly, as shown in Table 3, the percentage of glycerol in the permeate was the same, 12%, both for refined soybean oil and refined canola oil. These results indicate that probably the separation of glycerol by ultrafiltration depends more on the acidity of the oil used in the reaction than on its origin. Furthermore, the
higher acidity of the crude canola oil provided the best retention of the dispersed phase and, consequently, of glycerol when compared to the degummed soybean oil.