What is the difference between rapeseed oil produced by oil press leaching equipment and refining equipment?
As a common edible oil, the production process of rapeseed oil involves many links and different equipment. Among them, oil presses, leaching equipment and refining equipment are the three common production methods. Although they are both designed to extract oils from canola, there are certain differences in quality, nutrient content, and safety of the canola oil obtained by each method. 
1. Rapeseed oil produced by oil press.
An oil press is a device that extracts oil from rapeseed by physical pressing. It uses pressure to squeeze out the oil from the canola without adding any chemicals. Therefore, the rapeseed oil produced by the oil press is relatively pure and retains more natural nutrients, such as vitamin E, linoleic acid, etc. In addition, because the physical pressing process does not involve high-temperature treatment, the natural antioxidant substances in the rapeseed oil produced by the oil press are retained, and it has good antioxidant properties. 
2. Rapeseed oil produced by leaching equipment.
The leaching equipment is a device that extracts the oil from rapeseed through chemical solvents. It first crushes the canola into a powder and then soaks it in an organic solvent such as n-hexane to dissolve the oil in the solvent. Subsequently, the solvent is separated from the oil by heating and evaporation to obtain the leaching oil. Although leaching equipment is capable of extracting more oil, due to the use of chemical solvents, some solvent residues may remain in the leaching oil, posing a potential risk to human health. In addition, high temperature treatment during the leaching process can also lead to the loss of some nutrients.
3. Rapeseed oil produced by refining equipment.
Oil refining equipment is equipment for further processing of crude oil, aiming to remove impurities, odors and harmful components in crude oil, and improve the stability and safety of oil products. The refining process typically includes steps such as degumming, deacidification, decolorization, and deodorization. Refined oils are purer in quality, but some of their natural nutrients and antioxidants may also be lost. In addition, some chemical additives may be used in the refining process, such as alkali, bleached earth, etc., which may also have an impact on the quality of the oil.
In summary, there are certain differences in the quality, nutrient content and safety of rapeseed oil produced by oil presses, leaching equipment and refining equipment. Among them, the rapeseed oil produced by the oil press is relatively pure and retains more natural nutrientsAlthough the rapeseed oil produced by the leaching equipment has a high extraction rate, it may have the problem of solvent residues;Although the rapeseed oil produced by the refining equipment is pure, it may lose some nutrients and antioxidants. Therefore, when choosing canola oil, consumers should choose according to their needs and preferences.