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NEWS
Corn Oil Extraction: How Does Corn Extract Oil?
Time:Thu-11-21 hits:
The extraction of corn oil only requires six steps, which is simpler than other oils.
Embryo Extraction → Impurity Removal → Drying → Pressing → Refining → Finished Product.
Corn oil needs to be refined, and unrefined corn oil can be used as industrial oil.
1. Embryo Extraction
Germ extraction is one of the key links in oil extraction. According to the different resistance to crushing of corn germ and endosperm, the endosperm is crushed with a crushing device, and then the corn germ is sieved with a sieving device. Generally, 4%~8% embryo can be extracted from corn, and the required embryo has less water content, high purity, no impurities, and no mildew.
2. Removal of Impurities
Before squeezing, it must be thoroughly cleaned to remove impurities, which can be purified with a vibrating screen to remove impurities such as slag and powder in the germ and improve the purity of the germ. If there are many impurities in the germ, it will not only waste food, but also reduce the oil yield.
3. Dry
The freshly extracted corn germ has a moisture content of about 13%, which is far from the requirement of squeezing water. Therefore, proper roasting and drying should be carried out before squeezing to reduce the germ moisture to below 9% to increase the squeezing effect.
4. Squeeze
When pressing, make sure that the temperature of the cake is about 100°C to facilitate the oil production. The corn germ contains a high oil content. The double pressing method can be used, that is, after the first pressing, the corn germ is crushed and steamed again. Always pay attention to the clearing of oil in the cake, squeeze, and squeeze.
5. The squeezed crude oil can be used as industrial oil after 24 hours of natural precipitation. If it is to be used as edible oil, it needs to be refined again.
The simple refining method is: filter the crude oil and heat it into a large pot to remove the surface foam, heat to remove water, pour the oil into another pot to cool and settle for 12 hours, and the super clear oil can be eaten.
