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  • How to refine sunflower oil?
  • Physical refining of sunflower oil is discussed in details. Recent developments in the field of processes, equipment and control have made it possible to refine by physical way the high phosphatide containing seed oils as well.
  • Why is crude sunflower oil difficult to refine?
  • Crude sunflower oil which has reached a certain level of oxidation, is difficult to refine. There are two main difficulties: - removal of non-hydratable phospholipids/iron; - and sometimes when the autooxidation has really gone too far fix colour formation, which is not removable by bleaching and/or heat bleaching.
  • Is it safe to buy sunflower oil from other countries?
  • Purchasing crude sunflower oil (or seed) from certain countries involves the risk of PAHs (polyaromatic hydrocarbons) contamination, originated from direct fuel gas drying of the seeds or from environmental pollution. PAHs (like benzo-a-pyrene) are carcinogenic and should be removed during refining.
  • What is predewaxing crude sunflower oil?
  • Predewaxing Crude sunflower oil contains waxes, which are long chain fatty acid ester with long chain alcohol (C 44 - C60). These waxes crystallise at room temperature and cause "turbidity" in the refined oil. That is why it is necessary to remove them in order to produce "bright oil".
  • Does enzymatic degumming reduce phosphorus content in crude sunflower oil?
  • The degumming process with both enzymes decreased the phosphorus content in crude sunflower oil below 3 mg/kg. Phospholipid content showed a drastic decrease with the enzymatic degumming process. The calcium and magnesium content in crude sunflower oil was extremely high, and it was reduced noticeably with the enzymatic treatment.
  • Does enzymatic degumming affect oxidative stability of crude sunflower oil?
  • In the degummed oil samples with phospholipase A1 and acyltransferase, the oxidative stability index was found to be 4.18 h and 4.33 h respectively. These results indicate that the enzymatic degumming process affected several quality and stability characteristics of crude sunflower oil. Lipid …