50TPD Semi continuous Oil Refining Equipment

Degumming -  passing hot water through the oil to precipitate out gums and proteins that are soluble in oil but not in water, then discarding the water along with the impurities

Neutralization or Deacidification - treats the oil with sodium hydroxide or sodium carbonate to pull out free fatty acids, phospholipids, pigments, and waxes

Bleaching - removes off color components by treatment with fuller's earth, activated carbon, or activated clays, followed by heating, filtering, then drying to recoup the oil

Dewaxing or Winterizing - improves clarity of oils intended for refrigeration by dropping them to low temperatures and removing any solids that form.

Deodorizing - treating with high-heat pressurized steam to evaporate less stable compounds that might cause "unusual" odors or tastes.

Filtering - a non-chemical process which screens out larger particles, could be considered a step in refinement, although it doesn't alter the state of the oil.