How is corn germ oil extracted?

Corn germ isCorn processing equipmenta product of the operation process; Generally, there are three common methods of embryo extraction, semi-wet embryo extraction, wet embryo extraction and dry embryo extraction, first, wet embryo extraction: corn is soaked in a large amount of water containing sulfurous acid and then ground and deembryonic, and the cyclone separator is used to separate a relatively complete germ, which is generally used by the starch industry and the glucose industry to produce starch with more than 90% purity.

Second, dry degermination: dry degermination refers to corn within 15% of safe moisture, direct degermination and slag, and then extract corn germ after one or more times of pressing the embryo, the current corn dry embryo extraction process has corn co-production embryo extraction process and corn simple dry embryo extraction process two kinds.

1.Corn embryo milling process: corn embryo milling, that is, the processing technology of corn flour and corn germ products produced at the same time in corn processing.

2.Corn co-production refers to the corn processing technology that extracts corn grits, corn germs and a variety of corn flour at the same time in the processing process of corn deep processing equipment.

3. Semi-wet embryo extraction: This process is to use the difference in water absorption between the germ and the endosperm of corn, the elastic toughness and crushing strength after water absorption to separate the germ to achieve the purpose of separating the embryo.

Use corn processing equipment to crush, peel, and remove the germ, and then use the difference in particle size, specific gravity and suspension speed of the embryo, endosperm and skin to separate the pure endosperm (including the embryo percent and the embryo, endosperm mixture, the mixture is graded by air gravity, and then the embryo is flattened, and the embryo is separated by sieving to obtain pure endosperm.

To put it simply, the process of semi-wet embryo extraction in corn processing equipment is roughly divided into: corn cleaning (impurities, side stones, iron) moistening and quenching and tempering with water vapor, peeling and slag breaking, 3 pressing embryos, 3 grading, 3 embryo extraction, air absorption, peeling, sieving powder,

Pressed, you can look on the corn oil packaging, there is a description of the production process. In addition, the oil yield of corn germ is not low, at thirty or forty percent.

Traditionally, there are pressing and leaching methods for separating oil from corn germ. Although they have a high oil yield, they will cause protein denaturation to varying degrees during the oil extraction process, thus affecting their nutritional value and functional properties.

The pressing method can not be applied to raw materials with low oil content, and the oil content of corn germ is low, and the leaching process is generally used.

Because the germ has to be pressed to produce oil, you can't press the starch well, and most of the corn is starch, and if the starch is not separated, the extraction cost of germ oil is too high.

As the name suggests, germ oil is contained in the germ. After separating the starch, it is easy to separate the oil in the germ, and the process is simple and the yield is high.

Out of two products, oil and starch, the industrial chain is long, hehe.

Corn germ oil can be used to quickly cook and fry foods.

Corn oil is golden and transparent in color, fragrant and fragrant, and has considerable stability when frying at high temperatures. Deep-fried food is crispy and delicious, and the cooked dishes can not only maintain the original color and aroma of the dishes, but also do not lose their nutritional value.

Mix cold dishes with corn oil and have a pleasant aroma. Less oil smoke and no greasy during cooking. Corn oil has a freezing point of 10, and the oil contains a small amount of vitamin E, which has a strong antioxidant effect.

Corn oil is mainly used to fry food, and the color is more beautiful.

Eating like normal cooking oil, although it is relatively high, it is indeed more helpful for health.

Its main feature is that it is light, and the stir-fry will not be very fragrant, not as good as peanut oil or even soybean oil, but the nutritional value is still quite high.

It is especially suitable for mixing cold dishes, mixing dumpling filling, etc., if you are a rich lord, it is also good to use it to fry things, and the oil after frying looks basically unchanged, much stronger than other oils.

It is recommended that you try the fresh embryo series corn oil of the West Ace, the high-end product in the corn oil, of course** is not affordable for the general public, hehe, I am not a trust, I just like health, often study this thing, I will not list what this data and that data, I hope these are helpful to you.

1. Clean up. The germ of corn grits ** is often mixed with corn flour and skin danders, and it should be cleaned with a double-layer vibrating sieve. Sieve mesh, first mesh, second 4 mesh.

If there is still more scrap mixed with the sieve, a 5-mesh or 7-mesh sieve can be used to reduce bud loss. The germ of corn starch**, mixed with radicle chips mixed with skin dander, should be continuously rinsed in clean water with a shallow dish or launder to remove.

2. Drying. ** After the corn germ is cleaned, it is prone to oil deterioration and rancidity due to the high moisture. Therefore, the cleaned corn germ needs to be dried or dried until the moisture content is less than 10%.

3. Rolling embryos. After drying, the corn germ is then rolled into millimeter flakes through the roller rolling machine, destroying the cell structure for steaming and pressing.

Fourth, steaming and stir-frying. Fry the embryo in the steaming wok for 40-50 minutes until the embryo gradually turns brown-red and can smell the aroma. Be careful not to have a burnt smell. At this time, the temperature of the embryo is about 115-120 degrees Celsius, and the water content is between 2% and 4%.

Fifth, pressing. The steamed and fried embryo is directly fed into the screw press to extract oil. When operating, the initial feed should be small.

After the press is running normally, the material is evenly fed, and the oil and cake are discharged. A normal press, with an oil speed of 8 revolutions per minute. The residence time of the embryo in the press chamber is minutes.

The thickness of the film is about 5-6 mm. The oil yield is generally in the range of 22%-28%. The residual oil rate in the cake is 5%-6%.

The extracted corn germ oil is commonly known as "crude oil". "Crude oil" is treated by hydration, alkali refining and deodorization to obtain high-quality corn germ oil.