Soybean oil extraction process

At present, three kinds of oil extraction processes are mainly used in the oil and fat industry: solvent leaching method, pressing method and extrusion puffing-leaching method.
For the traditional three oil-making processes, the pressing method is to physically squeeze out the oil, the process is simple, but the oil yield is low, the protein denaturation is serious during the oil extraction process, and it can only be used as a fertilizer, resulting in a large number of high-quality plants. Waste of protein.
Solvent leaching and extrusion puffing-leaching method have high oil yield, but labor intensity is large, and there is solvent residue problem. Solvent No. 6 and n-hexane which are main leaching solvents have certain toxicity, are flammable and explosive, and have poor production safety.
Basic principle of oil extraction by microwave drying
Microwave drying method is based on mechanical crushing. It uses an enzyme that degrades the complex of vegetable oil cells, lipoproteins, and lipopolysaccharide to act on the oil, so that the oil is easily released from the oil solids, and the protein and protein are utilized. Carbohydrates separate oil and non-oil components by the difference in affinity between oil and water and the difference in oil to water ratio [11]. In the water enzymatic process, in addition to degrading oil cells and decomposing lipoproteins, lipopolysaccharides and other complexes, the enzyme can also destroy the lipoprotein membrane on the surface of the oil droplets, reduce the stability of the emulsion, and thereby increase the yield of free oil.

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