The objective of refining is to remove objectionable co-constituents in oil with the least possible damage to glycerides and minimal loss of desirable constituents. Ways of refining depend on nature and quantity of impurities contained in crude oil, application of RBD oil.Classical chemical refining is used through successive steps: it must be degumming, neutralizing, bleaching, deodorizing and sometimes winterizing (Mainly removing free fatty acid and other minor constituents).

The set of equipment has obtained national patent (patent No. isLD99 25288.7), it is our developed third generation product with more advanced and mature technology, and itwon GoldMedal on 8th China Fair of Inventions and New Technologies and Silver Medal on 6th International Invention Exhibition. It adopts intermittent refining craft, and has advantages of convenient transportation, small covering area, less operation staff and saving energy.