Cooking oil refining process

Cooking oil refining process is to refine the crude vegetable oil, get rid of the deleterious impurity, then get the high quality edible oil. According to the different capacity,the oil refinery plant can be devided into three types:

Batch type refinery plant,

Semi-continuous type refinery plant,

Fully-continuous type refinery plant.

Cooking oil refining process

Different raw materials have a little differences on the cooking oil refining process, such as for peanut,soybean,cotton seed, sesame,castor,rapeseed, etc.

The cooking oil refining process has four steps:degumming,deacidification,decolorization and deodorization.
For corn germ,rice bran and sunflower seed oil, the refining process also includes dewaxing. And the refining process of palm oil and the palm kernel oil includes fractionation.

The three types of oil refinery plant:

1.Batch type oil refinery plant:

Normally the capacity for this type is less than 20TPD. The refining process of this type is refined  one batch by one batch.

2.Semi-continuous type oil refinery plant:

Normally the capacity for this type is 20-50TPD. The refining process of this type is parts batch by batch,and parts continuous.

3.Fully-continuous type oil refinery plant:

Normally the capacity for this type is above 30TPD. The refining process of this type is fully continous, no need stop in the refining process.

The cooking oil refining process:

cooking oil refining process

1. Degumming and deacidification in cooking oil refining process
Degumming is using phosphoric acid ,water to react crude oil and then separate phosphatide from oil. But in order to reduce more phosphatide, after enough phosphoric acid treatment, adding alkali inside oil to neutralize free fatty acid , and washing before gum separation , this process is called deacidification. Here the byproduct is soap stock which can be used for making soap.
Main cooking oil refining equipment : alkali bin, oil refining kettles

2. Decoloration in cooking oil refining process
Decoloration is using clay to bleach oil , in this step, clay will absorb dark colorant of oil .The quantity of clay is depending on the deepness of crude oil. After bleaching , used clay will be screened out by vibrating screen.
Main cooking oil refining equipment : decoloring kettle, vibrating screen, pumps

3. Deodorization in cooking oil refining process
This step is to remove some unnecessary odors from crude oil. Normally for chemical oil refining ,it adopts plate deodorizing tower using high temperature steam to remove odors.
Main cooking oil refining equipment : deodorizing kettle, pumps

After above steps , the final product is refined cooking oil ,but some cooking oil need more treatment such as dewaxing for sunflower oil, fractionation for palm oil etc.

Cooking oil refining plant

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