What is the vegetable oil refining process?

Date:May 11, 2017/ DOING News/ Chat online/ Leave a message
vegetable oil refining machine
Vegetable oil refining machine

Vegetable oil refining is necessary for vegetable oils & fats or animal oils & fats so they can be used for cooking and frying foods. The crude oil obtained from cooking oil press machine or solvent extraction plant contains impurities.
Vegetable oil refining machine helps to remove impurities to make the edible oil, more palatable and stable against rancidity upon storage. The process of removing these impurities is called refining.Refining of vegetable oils is essential to ensure removal of Gums, Waxes, Phosphatides and Free Fatty Acids (F.F.A.) from the oils.

For capacities higher than 30T/24hours Continuous Edible Oil Refining Process is recommended against Batch Refining.

   continuous refining machine
Continuous refining machine

Continuous Refining will comprise of following steps:

Degumming Section of Continuous Refining:
Here the oils are given acidic treatment where by gums are precipitated and separated out by centrifugal separation or some times only gum conditioning is carried out (when gum content is low) and gums are separated in subsequent neutralising process.

Neutralising Section  of Continuous Refining:
The pretreated oil is subjected to Alkali Refining. The caustic soda reacts with Free Fatty Acids (F.F.A.) present in the oil and forms soap stock, the soap stock is separated out by centrifugal separator, oil is washed with water for complete removal of soap stock. The wash water is separated out by centrifugal separators.

Bleaching Section of Continuous Refining:
The neutralized oil is treated with bleaching earth/activated carbon for removal of colouring pigments. The bleaching agent is filtered out in vertical pressure leaf filters. Henan Doing Comapny design ensures uniform consistency in colour with minimum requirement of bleaching agent. The bleaching line is versatile and adoptable for all varieties of vegetable oils.

Deodorization Section of Continuous Refining:
As the name suggest process is meant for removal of odour. Every vegetable oil has its own distinct natural odour. During neutralization and bleaching operation unpleasant odour is imparted to the oil, it is therefore essential to remove this odour. The deodorisation is essentially a process of removal of odiferous matter. The operation is carried out at high temperature by injecting open steam and maintaining high vacuum at which time all odoriferous matter is distilled off and carried away to barometric condensors through vacuum system. The resultant oil is odourless – deodorized oil.

Dewaxing Section of Continuous Refining:
Oils like sunflower oil or maize germ oil (corn oil) have waxes present in them. At low temperature these waxes gives hazy appearance to oil, which is not liked by consumers. It is therefore essential to remove these waxes prior to bottling and marketing of oil. Henan Doing Company offers dewaxing units.

Physical Refining:
For oils like palm oil there is no necessity to go for alkali refining. After pretreatment of oil the oil is deodorized cum physically refined. The Free Fatty Acid (F.F.A.) present in the oil is distilled off at high temperature and high vacuum. Henan Doing Company offers physical refining system also.

Thus for any of your refining requirement of vegetable oils, whether batch or continuous Alkali Refining or Physical Refining Henan Doing Company is at your service for more information please contact.

Leave a message

If you wanna to get more details about What is the vegetable oil refining process?, you can send E-mail to market@doingoilmachine.com . Or you can consult our professional engineers and specialized sales team by leaving a message in below form. We will contact you ASAP. You also can visit our factory in Henan, China.






Leave a message