The refining process involves several stages to purify the oil. The resulting crude oil requires further refining to remove impurities.
From Palm Fruit to Cooking Oil: The Refining Process
While effective, mechanical pressing alone may not extract every last drop, leaving residual oil in the solid byproduct, known as press cake. This initial purification is critical to prevent contamination and ensure the efficiency of subsequent extraction steps.
The pressed cake from the initial stage is treated with food-grade hexane, a solvent that dissolves the remaining oil. Samples are tested for acidity, peroxide value, and contaminants to ensure the final product meets international safety standards.
From Palm Fruit to Refined Oil: The Processing Journey
Modern Solvent Extraction: Maximizing Yield To achieve higher efficiency and recover nearly all the oil, the industry employs solvent extraction. Degumming removes phospholipids, neutralization eliminates free fatty acids, and bleaching with activated clay improves color and clarity.
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