Sunflower seeds contain more than 45% of the oil. The seeds are first subjected to decorations to obtain high protein meal, the domesticatedÂ Sunflower Seeds Solvent Extraction PlantÂ are subjected to mechanical extraction. In one method only pre-pressing is carried out leaving 18 to 20% as residual oil in the pre-pressed cake. In the second method full pressing is carried out in screw presses leaving 10 to 12% residual oil in the fully pressed cake. For recovery of residual left over oil in the cake, the cake is subjected to the solvent extraction process. ever any phosphates present in the feedstock will char at the high temperature used for steam refining deodorizing. It claimed that a crude rice bran oil suitable for steam refining deodorizing can be prepared by water degumming followed by phosphoric acid treatment.