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  • How is edible oil processed?
  • In the processing of edible oils, the oil is heated under vacuum to near the smoke point or to about 232 °C (450 °F), and water is introduced at the bottom of the oil. The water immediately is converted to steam, which bubbles through the oil, carrying with it any chemicals which are water-soluble.
  • How is vegetable oil produced?
  • The production process of vegetable oil involves the removal of oil from plant components, typically seeds. This can be done via mechanical extraction using an oil mill or chemical extraction using a solvent. The extracted oil can then be purified and, if required, refined or chemically altered.
  • How much oil is produced per hectare per year?
  • Typical productivity of some oil crops, measured in tons (t) of oil produced per hectare (ha) of land per year (yr). Oil palm is by far the highest yielding crop, capable of producing about 4 tons of palm oil per hectare per year. The following triglyceride vegetable oils account for almost all worldwide production, by volume.
  • How is crude oil refined?
  • Retrieved March 13, 2019. Certain crude oils that contain minor amounts of impurities other than free fatty acids can be refined by a process known as steam refining. It is merely a high-temperature steam distillation under reduced pressure.