The soybean oil is extracted as much as possible in the press plant, as a result, phospholipids flow in to oil, resulting in increase of refining costs in refineries and decrease of first-grade oil yield. All of these problems can be improved by controlling the phosphorus content in crude leached oil. The presence of phospholipids in soybean and the factors that affecting the composition and structure of phospholipids in production process were analyzed to study how to reduce the phosphorus content, improve the refined oil yield and decrease the refining costs. |