Edible Oil Refining Plant

Generally, the process of edible oil refining plant includes Degumming, Neutralization, Bleaching and Deodorization and Winterisation. Chemical refining is the traditional method whereby the free fatty acid of the crude oils are neutralized with Caustic Soda.

Edible Oil Refining Plant

Dry Degumming

Incoming crude oil from storage is continually heated to degumming temperature by outgoing refined oil, or by preheater during start-up. Food grade acid is constantly dosed and mixed with the oil.

The oil-acid mixture flows to a degumming vessel. There, on contact with the acid, gums in the oil decompose to liberate phosphatides and metals, which are removed during adsorption bleaching.

Oil Bleaching

Degummed oil continues to a slurry tank under vacuum. Bleaching earth is concurrently metered to the slurry tank to form a slurry of oil and earth. This slurry flows through a two-stage bleacher vessel. In the first stage, the slurry is heated to bleaching temperature. In the second stage, the bleaching reaction proceed and impurities, such as metals, phosphatides, pigments and peroxides are trapped on the earth or decompose.

The slurry is continually discharge from the bleacher through the bleaching earth and polishing filters, which separate the earth and its trapped impurities from the oil.

Oil Deodorisation

Bleached oil is further de-aerated. It is then heated to deodorising temperature in two steps, firstly by outgoing refined oil, or start-up heater, and secondly by high-pressure steam generator. The oil flows under high vacuum through two vessels: The flash vessel, where around 1/3 of fatty acids evaporate from the oil.

The deodoriser, which features an integrated pocked-column tower. Here, impurities such as aldehydes, ketones and fatty acids are stripped from the oil by steam and remaining carotenoid pigments decompose.

Physical Refining Plant

Our Physical Refining Plant provides least cost physical refining for medium to high volume processor. Ease of operation means your plant runs under optimal conditions for greatest productivity. And our generous equipment sizing and robust specification give reliable operation day after day, year after year. we offer our refining plants in a range of designs.

In our two-step physical refining process, we first treat the oil with natural clays (also called bleaching) under low absolute pressure at high temperatures.  Impurities, pigments, and bacteria are absorbed onto these clays and then removed through filtration. 

The second step includes use of our vacuum deodorizer. This technology is widely used in food processing and has a long history of being the most effective and efficient method of producing a safe, sterile, consumable product. The vacuum deodorizer works by bringing the oil to a proper temperature to ensure sterilization by removing bacteria and other impurities.