Physical refining and chemical refining of edible oil

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Physical refining and chemical refining of edible oil

Physical Refining In Physical Refining, Vegetable Oil is subject to distillation to remove free fatty acids. The alkali treatment is completely avoided. This reduces the amount of waste water and eliminates production of soap. This physical refining process is becoming more popular. Chemical Refining In Chemical Refining, Vegetable Oil is treated with caustic lye for separation of free fatty acids from oil. This is a conventional process that can be applied to all oils. A byproduct of alkali refining is soapstock, which is used for manufacture of low quality washing soap. Alternately, the soapstock can be treated with acid to recover fatty acids. The waste-water from refinery requires extensive treatment. This can be avoided by alternate Physical Refining process.


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Physical refining and chemical refining of edible oil by cookingoilmachine - Issuu