The soybean oil extraction process (soybean oil project) typically includes the following main steps:
Cleaning and Dehulling: Soybeans are thoroughly cleaned to remove dirt, stones, and other impurities. They may also undergo dehulling to remove the outer hulls.
Cracking and Flaking: Cleaned soybeans are cracked into smaller pieces and then rolled into flakes to increase the surface area for oil extraction.
Cooking: The soybean flakes are cooked or heated with steam to coagulate proteins and rupture cell walls, facilitating oil release.
Pressing: The cooked soybean flakes are mechanically pressed to extract crude soybean oil. This can be done using screw presses or hydraulic presses.
Oil Filtration: The crude soybean oil undergoes filtration to remove solids and impurities.
Degumming: The filtered oil may undergo degumming to remove phospholipids, which can cause oil deterioration.
Neutralization: If needed, the oil is neutralized with alkali to remove free fatty acids and other impurities.
Bleaching: The oil may be bleached using activated clay or other adsorbents to remove pigments and improve color.
Deodorization: The oil undergoes deodorization under high temperature and vacuum to remove odors and flavors.
Dewaxing (Optional): In cold climates, the oil may undergo dewaxing to remove waxes that can crystallize and cloud the oil at lower temperatures.
Packaging and Storage: The refined soybean oil is packaged into containers suitable for storage and distribution.
These steps provide an overview of the typical process used to extract and refine soybean oil from soybeans. Variations in the process may occur based on factors such as scale of production, technology used, and desired end product specifications.
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