Degumming removes phospholipids and other gums, while neutralization eliminates free fatty acids. Refining and Purification Crude peanut oil, whether from pressing or solvent extraction, contains impurities that must be removed.
Neutralization of Free Fatty Acids in Peanut Oil Refining
The solvent dissolves the remaining oil, which is then separated and recovered through distillation. After mechanical pressing, the press cake undergoes further treatment with a food-grade solvent, typically hexane.
Solvent Extraction: Maximizing Yield For large-scale production, solvent extraction is commonly employed to maximize oil recovery. The crushed peanuts are then fed into a screw press or hydraulic press, where immense pressure separates the oil from the solid residue, known as press cake.
Neutralization of Free Fatty Acids in Peanut Oil Refining
The combination of pressing and solvent extraction delivers high yields suitable for commercial demands. This method operates at lower temperatures compared to other processes, preserving the natural antioxidants and flavor compounds.
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