1. The process of removing colloidal impurities in crude oil is called degumming. Because the colloidal impurities in crude oil are mainly phospholipids. degumming is often called dephosphorization in industrial production. Degumming before alkali refining can reduce the loss of neutral oil, improve the quality of alkali refining, save the amount of alkali used, and obtain valuable by-products-phospholipids.
There are many degumming methods, such as hydration degumming, acid refining degumming, adsorption degumming, and chemical reagent degumming. The method we currently use is hydration degumming.
2. The function of the decolorization section is mainly to remove the pigment in the oil, and at the same time, it can also remove the trace metal in the fat, remove the residual trace soap particles, phospholipids and other colloids and some odorous substances, and remove polycyclic aromatic hydrocarbons and residues. Pesticides, etc. Adsorption decolorization: Activated clay is usually used as a decolorizing agent.
3. Oil deodorization is a process that uses the difference between the volatility of odorous substances in oil and fatty acid triglycerides to remove odorous substances by steam distillation under high temperature and high vacuum conditions.
The above technology process is the batch refining process of general oil.