The introduction of crude oil refining methods at Glory Oiltech

There are mainly two kinds of crude oil refining methods at Glory Oiltech— physical refining and chemical refining. Then what is the difference between physical refining and chemical refining of edible oil? Their differences are mainly reflected in the following aspects, let’s talk about this together:

Actually, how to get rid of the free fatty acid (FFA) in the crude oils is the main difference between physical refining and chemical refining of edible oil. In the physical refining process, the FFA is removed by steam; while in the chemical refining process, the FFA is neutralized by NaOH (sodium hydroxide solution). The detailed process of physical refining and chemical refining process are as follows:

Physical refining process of crude oil

Degumming - bleaching - neutralization & deodorization

1.Add phosphoric acid solution to get precipitate and then filtrate the precipitate.

2.Add white clay to get ride of the color and other impurities.

3.Inject steam to take away the smell and get rid of FFA.

Cooking oil chemical refining flow

Chemical refining process of crude oil

Degumming - neutralization - bleaching - deodorization

1.Add hot water to get precipitate and then filtrate the precipitate.

2.Add NaOH(sodium hydroxide solution) to neutralize FFA.

3.Add white clay to get ride of the color and other impurities.

4.Inject steam to take away the smell and get rid of FFA.

The project cases of Glory Oiltech edible oil refining plants

Above is the introduction of two crude oil refining methods at Glory Oiltech and the difference between physical refining and chemical refining of crude oil is the way to remove free fatty acid(FFA). Besides, there are three common types of cooking oil refining equipment at Glory Oiltech, namely batch type cooking oil refining, semi-continuous cooking oil refining and fully-continuous cooking oil refining. Meanwhile, the sequence of process is a little bit different. So you can choose the better method according to your conditions. If you want to know more about the refining of crude oil, if you want to make business about oil refining, Glory Oiltech can provide you the professional equipment and service. Welcome to contact us!