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Oil expeller

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Oil expeller is using external mechanical forces, by increasing the temperature, activate the oil molecules, to squeeze oil from the oil seeds. Oil expeller ca

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Oil expeller is using external mechanical forces, by increasing the temperature, activate the oil molecules, to squeeze oil from the oil seeds. Oil  expeller can be divided into home oil expeller machine, water pressure oil  expeller machine, spiral oil  expeller machine, hydraulic oil expeller machine, high precision filtration press, automatic oil  expeller machine.

 Pressing method:

The process is relatively simple: after the oil steamed and cooked,using mechanical method to squeeze oil from the oil seeds.

The oil  expeller machine can be divided into cold  expeller machine or hot  expeller machine by the different processing of raw materials

Cold oil expeller machine is directly pressing the raw material without cooking ,the color of oil is more bright, but the oil yield is low, and oil flavor is not strong. But the hot oil expeller machine need cooking the raw material before pressing in order to reduce the moisture of raw material to increase the activity and liquidity of oil molecules , and improve the oil yield The disadvantage of hot oil expeller machine is the destruction of the chemical composition of the oil, resulting in a deeper color of the oil. The hot pressed oil must be refined to be edible.
The basic process of oil oil expeller is as follows:
1 Conventional production process: Raw material → Cooking→ pressing→pressed crude oil  ( i.e. sunflower oil, rapeseed oil )

2 Special oil production process: Oil seeds→roasting→pressing →Filtration→Fragrance Oil    ( i.e. groundnut oil)

3 Special oil seeds production process: Oil seeds→whole seeds cold press→ filter→ cold pressed oil (I.e. olive oil)

Note: for soybean oil, rice bran oil , normally it doesn't need oil expeller, just pretreatment before oil extraction.
 

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