The whole soybean oil production process contains three workshops: soybean pretreatment workshop, soybean oil extraction workshop and soybean oil refining workshop. I. craft flow of pretreatment workshop of soybean oil production process Soybean magnetic box cleaning crusher soften flaking roll cooker oil press(chosen) to extraction workshop Ii.Craft flow of solvent extraction workshop of soybean oil production process solvent Extractor mixed oil 1st and 2nd evaporation stripping tower crude soybean oil wet meal dtdc toaster soybean cake Iii. craft flow of refining workshop of soybean oil production process Crude soybean oil degumming and deacidification decolorization deodorization refined soybean oil Main process: 1. degumming and deacidification: the gumming is moved by phosphoric acid and hot water. there are two ways to move the acid in the soybean oil. one is chemical way, the other one is physical way. the chemical way is using naoh to react with acid. this way is suitable for the capacity of 5-30t per day. the physical way is using steam and centrifugal to move the acid. this way is used for capacity from 30-2000t per day. 2. decolorization: this step is used to adjust the color of the oil. you can control the color of the soybean oil according to the requirement of your market. 3. deodorization: the function of this step is to move the special smell in the oil. this is an important standard for refined soybean oil.