The pressed cake from the initial stage is treated with food-grade hexane, a solvent that dissolves the remaining oil. Fractionation separates the oil into different components based on their melting points, allowing for the creation of products like palm olein (liquid at room temperature) and stearin (solid).
Solvent Extraction: How It Boosts Oil Yield and Efficiency
Refining: Transforming Crude Oil into a Consumer Product Crude vegetable oil contains impurities such as phospholipids, free fatty acids, and pigments that affect its stability, appearance, and taste. The resulting crude oil requires further refining to remove impurities.
Interesterification rearranges the fatty acid chains on the glycerol molecule, altering the oil's texture and stability without introducing trans fats, providing a versatile ingredient for food manufacturers. The refining process involves several stages to purify the oil.
Solvent Extraction: How It Boosts Oil Yield by Dissolving Residual Oil
This mixture is then heated to vaporize the solvent, leaving behind a concentrated oil product. Throughout the entire production process, strict quality control measures are implemented.
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