Solvent extraction of edible oil is a common oil extraction method, and its advantages and disadvantages are as follows:

Advantages:

High oil yield: The oil can be effectively extracted from the oil, and the oil yield is usually higher than other methods such as squeezing method. For example, in the extraction of soybean oil, solvent extraction can make the oil yield reach 18%-22%, while the squeezing method is generally 13%-16%.

Low cost: The solvent extraction process is relatively simple, the equipment investment and operation cost are low, and it can treat all kinds of oily raw materials, including low oily raw materials, and the unit cost can be reduced through large-scale production.

Good product quality: High-quality oil can be extracted, and the obtained crude oil is light in color, clear and transparent, and contains less impurities, which is beneficial to subsequent refining and processing, and can obtain high-grade edible oil.

High production efficiency: The whole extraction process is carried out in sealed equipment, which can be used for continuous production and short production cycle, and can realize large-scale industrial production and improve production efficiency.

Disadvantages:

Solvent residue: Although it has been desolventized, there may still be a small amount of solvent residue in the oil. Long-term consumption of oil containing solvent residue may cause potential harm to human health, and the solvent residue needs to be strictly controlled, which increases the cost and difficulty of detection.

Potential safety hazard: Most of the solvents used, such as n-hexane, are flammable and explosive organic solvents. Improper operation in the production process may easily lead to fire, explosion and other safety accidents, which requires high safety for production equipment and operation.

Environmental impact: The volatilization of solvents and the discharge of wastewater in the production process will pollute the environment, so it is necessary to equip special environmental protection treatment equipment to treat waste gas and wastewater, so as to reduce the impact on the environment and increase the environmental protection cost.