1.Preheating:

 Pumping crude oil into hydrate tank (oil refining tank), on one hand, quickly stirring , on the other hand, heating by steam or heat-transfer oil (in coil pipe), rise oil temperature.

2.Degumming:

This is the most important section of hydrate de-gumming, manage the adding water (there is a little P-acid in the water) amount, temperature and add water speed, usually water adding
amount is about 3 times of phospholipid content, that is 3-10% oil weight, water temp needs to be higher than oil temp.

3.Deacidification:

This part adopt alkali refining method, that is use alkalis like (NaOH) to neutral the free fatty acid in oil, during this process it will produce soapstock , then separated from the oil by setting several hours. NAOH solution, not only neutral free fatty acid, also can act with other matters like protein, mucus, phospholipid, pigment. After settling, release the soapstock from the tank bottom. Adding hot water to rinse, remove off the leftover lye , soap and some unhydrated phospholipid in the oil. Finally pumping out soapstock from the tank bottom.

4.Decolorization:
In normal situation , there is pigment in the crude oil , we need to using the active clay to absorb the

pigment away , after 20 mins , we use the vibrating filter to filter the waste clay away . If you want to get light color oil , you need to add more active clay . That is mean , the customer can accord to his requirement to control the oil color. This process is carried out under the vacuum condition.

5.Deodorization and Dehydration:Usually ,there are some odors in the crude oil , it affects the quality of the edible oil . About our refining process , we usually use the direct steam to take odors away in the vacuum condition . General speaking there is about 0.5% water in the alkali refined oil, in the deodorization pot, thetemperature is very high , it also can finish the dehydration section.