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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 Refining Process is recommended against Batch Refining.

Continuous Refining will comprise of following steps:-

Pretreatment / Degumming Section:-

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:-

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.



Flowchart for Continuous Refining


Flowchart - Continuous Neutralizing Section

Bleaching Section:-

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. Our 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.


Flowchart - Continuous Bleaching Section

Deodorization Process:-

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.


Flowchart - Deodorising Section



Dewaxing Section :-

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. OHTPL 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. OHTPL offers physical refining system also.

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


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