Refining oil as the last section of the edible oil press, its use is mainly to remove the harmful substances contained in the pressed oil or affect the taste and shelf life of edible oil, according to the different refining processes, it is divided into physical refining, chemical refining and physical-chemical combination of mixed refining.
Just by looking at the name, many people will think that physical refining is better because chemical refining will definitely add some chemicals and chemical reactions with fats and oils, thus worrying about the safety of edible oils. This is not entirely true, in actual production physical refining is also to add phosphoric acid, white clay, catalyst and other chemicals.
So physical refining compared to chemical refining, the advantages are mainly reflected in the high economic performance, the production of waste water and low refining consumption, another major difference is that physical refining eliminates the need for chemical refining alkali refining alkali, so there is no soap foot production.
