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Soybean, commonly known as yellow soybean, has an oil content of 15.5%-22.7% and is a common vegetable oil. The market demand for soybean oil is huge, so more and more people are interested in soybean oil production, and the demand for soybean oil production equipment is also increasing.
The production process of soybean oil involves many precise links, and each step must be strictly controlled to ensure the quality of the oil. The following are the main processes of the standard production line:
Raw soybeans need to go through processes such as cleaning, crushing, softening, and flaking. In the cleaning stage, impurities are removed through vibrating screens and magnetic separators to avoid equipment wear; in the crushing stage, soybean particles are reduced to 3-5 mm to increase the surface area, providing a basis for subsequent processing; in the softening stage, the ductility of soybeans is improved by heating and humidification to reduce powder during tableting; in the tableting stage, soybeans are pressed into 0.3-0.5 mm thin slices to destroy cell tissue and create conditions for the release of oil.
Soybean physical pressing process : Use a screw oil press or hydraulic oil press to directly squeeze out the oil through mechanical pressure. This process retains more natural nutrients, but the residual oil rate is high (about 6-8%), which is suitable for producing high-end cold-pressed oil.
Soybean solvent extraction process : Use n-hexane and other solvents to fully dissolve the residual oil in soybeans, and the oil yield can reach more than 98%. The extracted crude oil needs to be recovered through a desolventizing tower and refined to remove the residue.
The refining process includes alkali refining, degumming, decolorization, deodorization and other steps:
Alkali refining: Use sodium hydroxide to neutralize free fatty acids to generate soap stock, which is separated by precipitation.
Degumming: Remove lecithin and other gum components to prevent oil oxidation.
Decolorization: Add activated white clay to absorb pigments and improve the transparency of oil products.
Deodorization: Distillation under high temperature and vacuum environment removes odorous substances and ensures the pure flavor of the oil.
QIE Group specializes in the design and manufacture of oil equipment, factory direct sales, and provides soybean oil production equipment with different processing capacities and its supporting equipment, refining equipment, and can customize equipment of different models and different processing capacities for customers. QIE Group welcomes your inquiries.
