Why can't edible oil extracted by solvent extraction be eaten directly?

When it comes to cooking oil, ensuring safety and quality is essential. While solvent extraction is a widely used method for producing edible oil, many people wonder: Why can't edible oil extracted by solvent extraction be eaten directly? Let’s explore the reasons behind this and how proper processing ensures the oil you use is safe, healthy, and delicious.

Solvent extraction is a highly efficient method for obtaining oil from seeds, nuts, and grains. In this process, a solvent—typically n-hexane—is used to dissolve the oil within the raw material. This technique allows manufacturers to maximize oil yield and minimize waste. However, the extracted oil in its raw form isn’t ready for consumption.

The picture of solvent extraction machines

Although this method can efficiently extract oil from oilseeds with a low residual oil rate, the crude oil produced through the solvent extraction process is usually not directly edible. Why is that?

1. Solvent Residues: Trace amounts of solvent may remain in the edible oil after solvent extraction. While these residues are minimal, consuming them can pose health risks if not removed.

2. Impurities: After solvent extraction, raw oil may still contain impurities such as free fatty acids, waxes, and pigments, which can affect flavor, aroma, and safety.

3. Oxidation: Without proper refining, the edible oil is prone to oxidation, leading to an unpleasant taste and potential health hazards.

Rice bran oil solvent extraction process

The crude oil extracted by the solvent extraction process does not meet the relevant standards without refining equipment to remove the solvent residue, and cannot be legally sold or consumed, that is, it cannot be eaten. In order to ensure the safety and quality of edible oil, crude oil must be strictly refined and processed, including degumming, deacidification, decolorization, deodorization, etc., to remove solvent residues, impurities and harmful substances to meet edible oil safety standards.

If you want to completely remove the solvent in the edible oil extracted by solvent extraction to obtain edible refined oil, you need to equip edible oil refining equipment. Henan Glory Company can provide you with edible oil pressing equipment, edible oil solvent extraction equipment, edible oil refining equipment, etc. Welcome to contact us.