Cooking Oil Refinery Process
Because of the high F.F.A. in the extracted oil, oils usually need refining before used as cooking oils. Althou it is not compulsory, more and more people in European and other countries are using the refined cooking oils only.
Generally speaking, there are three main methods to get refined cooking oils. thery are Physical refining, Chemical refining, Chemical-physical refining.
After getting of cooking oil of any oilseeds from the oil extraction machinery, it is refined in the refinery plant to remove the FFA (Free Fatty Acids), color and odor of the cooking oils. This is one of the latest chemically refined technology. Hence the refined cooking oil will be thin, without FFA, colorless and odorless. The main by product is the soap stock, which is widely used in soap industry.
Cooking Oil Refinery Process
For refining the oil, there are three basic processes in the refinery.
Neutralization : Neutralization process is done to neutral of oils from it's free fatty acids (FFA). This process is done in specially designed heavy-duty vessels by heating of oil and then adding of caustic soda (NAOH) with continuous stirring. Oil is heated in the vessel by using the thermic oil of thermic boiler or steam of steam boiler. Vessel is designed specially for the better neutralization process.
Bleaching : Bleaching process is done to remove the color of oil. This process is done in specially designed heavy-duty completely vacuum vessel by heating of oil and then adding of bleaching powders with continuous stirring. Oil is heated in the vessel by using the thermic oil of thermic boiler or steam of steam boiler. Vessel is designed specially for the better bleaching process.
Deodorizing : Deodorizing process is done to remove the smell (odor) of oil. This process is done in specially designed heavy-duty completely vacuum vessel by high heating of oil. Oil is heated in the vessel by using the thermic oil of thermic boiler or steam of steam boiler. Vessel is designed specially for the better deodorizing process with the highest bumping of oil in the vessel for better quality of final refined cooking oil.
