Soybean Refined Oil

The solvent extracted crude oil is treated with water at an elevated temperature that causes the swelling of phosphorus-containing oil in gum form. This gum is separated by high speed centrifuging separators. To neutralize the free fatty acids, caustic treatment is given and the neutralized oil is again separated by high speed centrifuging separators. The neutralized oil is bleached and filtered by use of activated earth. To remove the odour present in oil, it is heated at high temperature followed by suction and condensation of low b.p. fatty acids. The finished oil is stored in storage tanks.