As we know, there are still some impurities such as phospholipids, FFA, pigment, odor, etc in crude olive oil, we want to get more cleaner edible olive oil, we need the refinery plant to refine and remove the phospholipids, FFA, pigment and odor and so on, aims at improving the oil storage stability ,flavor and color. The refinery plant mainly included four processes: degumming, deacidification, decoloration, deodorization.
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| Olive oil refinery prcess |
Degumming Section:
There are some phospholipid, gum, and protein, the can be dissolved into oil when there is no water, but once there is water in oil, these impurity can be dissolved into water. So in degumming section, we use the hot water to wash crude oil for two-three times to make gold phospholipid condenses and reduces colloid, and it can remove these impurity.
Deacidification Section:
add some water and based on suitable temperature, usually need several hours open the below valve release the gum, then add some chemical materials for remove the acid materials, such add alkali liquor and stirring, then open the below valve release the soapstock, so if the crude oil FFA high, will lost much oil and get much soapstock, this materials can make further process for producing soap, cosmetic, ect.
Decoloration Section:
Normally using White Clay, decolorization is carried out by the obsorption function of white clay, this step usually need 25mins, temperature requirements around 105-110 Celsius.
Deodorization Section:
This step have high temperature requirement , around 260 Celsius, based on very high temperature, steam removes oxidation number, aldehydes, and ketones, and take off some of the acid, the smell will be evaporated.
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