How to refine sunflower oil into edible oil?

After pressing, the sunflower oil needs to be further processed to become edible oil, which called refining. Refining is the process of removing impurities and harmful components from the crude cooking oil according to the condition of the crude cooking oil to turn the crude cooking oil into standard edible oil.

Refinery include degumming, deacidification, decolorization and deodorization.

Cooking oil refining process

Degumming and Deacidification will finished in the first two refinery tanks. First, raise the temperature in the refinery tank to 70-80 degrees, add an appropriate amount of hot water to the crude cooking oil under high temperature conditions. After stirring with the paddles in the tank, precipitate for 4-8 hours, and then open the valve at the bottom of the refinery tank to release the sediment (micelle), then heat up again, add hot water and edible alkali (NaOH), precipitate again for 4-8 hours, open the valve, release the sediment (saponin, available for sale), and complete the degumming and deacidification.

Degumming and Deacidification process

The next step is decolorization. The principle of decolorization is to use adsorbents to absorb the pigments and other impurities in the hot oil, and then filter them together. Therefore, this process requires high temperature, high vacuum and hot steam.

Decolorization process

The last step is deodorization. The principle of deodorization is that under the same conditions, the odorous gas is easier to volatile, so the deodorization temperature needs to be around 260 degrees. The material of the deodorizing tank needs to be stainless steel. Carbon steel will generate manganese under high temperature conditions, which is harmful to the human body.

Deodorization process

The parameters of different crude cooking oils are different, so the refining process will also differ, and secondly, the requirements for refined cooking oil are different in each region, so before refining, we need to do composition testing on the crude cooking oil, and also confirm the requirements for the finished cooking oil.

Henan Glory Company specializes in cooking oil refining equipment for decades, Our cooking oil refining equipment is suitable for the refining of various oils, such as palm oil, palm kernel oil, peanut oil, soybean oil, cottonseed oil, etc., if you need, please contact us.