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Edible Oil Refinery Process:


The objective of refining is to remove objectionable co-constituents in edible oil with the least possible damage to glycerides and minimal loss of desirable constituents. Methods of refining depend on nature and quantity of impurities contained in crude oil, application of RBD oil.


The common refining process include: Degumming, Neutralizing, Bleaching, Deodorizing and sometimes dewaxing (Mainly removing free fatty acid and other minor constituents). The process is suitable for refining soybean oil, rapeseed oil, sunflower oil, palm oil and etc.

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Edible oil refinery 3D Design Edible Oil Refining Plant 3D Drawing 1,000tpd Soybean Oil Refining Plant

Flow Diagram:

Edible Oil Refinery Process Flow Diagram

Process Description:

1. Degumming

The purpose of degumming is to remove impurities such as phospholipids, gums, proteins and etc. There are several methods as follows: water degumming, acid degumming, special degumming and etc. 

2. Neutralizing 

The purpose of neutralizing is to remove free fatty acid in edible oil by using caustic soda while removing impurities such as phospholipid, pigments, metal ions and peroxide under the adsorption of soap stock.

3. Bleaching

Bleaching is the process which removes coloured matters by mixing bleaching earth with edible oil under controlled conditions of temperature. After proper mixing with bleaching earth for a specific residence time, the mixture is finally pumped into leaf filters with stainless steel mesh elements followed by polishing filtration.

Degumming Section Neutralizing Section Bleaching Section Bleaching Section

4. Deodorizing

Deodorizing is the final stage in edible oil refining in order to remove odoriferous material, free fatty acids and other undesired minor components by steam distillation under condition of high temperature and vacuum to produce a bland oil with a good shelf life.

5. Dewaxing

Through automatic control system, combined with crystallization curve (time-amount of crystallinity) of different oil, crystals in oil grow and finally can be separated by filtration to obtain dewaxed oil.

Deodorizing Section Dewaxing Section Dewaxing Equipment under Installation

Edible Oil Refinery Plant  Edible oil refining plant

 View more on Youtube: Soybean/Rapeseed/Cotton Seed Oil Plant Built by Myande

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