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  • What is the difference between physical and chemical refining of sunflower oil?
  • Tocopherol loss during physical refining was higher by 10% than in chemical refining due to the high temperatures used during the deodorization process, which removes free fatty acids in sunflower oil. In chemical refining process, sunflower oil retained more tocopherols compared to the physical refining method.
  • What are the advantages of Physical refining of sunflower oil?
  • Physical refining has several advantages compared to the classical chemical one. This process is more economical (improved yield, lower investment cost, less chemicals used) environmental friendly process (no soapstock to be treated, splitted) but more sensitive to the crude oil quality. Physical refining of sunflower oil is discussed in details.
  • Can sunflower oil be refined?
  • An experimental oil refining unit has been developed and tested for refining of sunflower oil. Crude pressed sunflower oil obtained from a local oil mill was refined using chemical method by degumming, neutralization, bleaching and dewaxing. The quality and composition of crude and refined oil were compared.
  • Does sunflower oil retain more tocopherols in chemical refining process?
  • In chemical refining process, sunflower oil retained more tocopherols compared to the physical refining method. However chemical refining is considered less efficient due to saponification of neutral oil. 1. Introduction Vegetable oils are obtained through two primary methods: pressing and extraction.
  • What is the refining process of sunflower oil?
  • The refining process involves degumming, neutralizing, bleaching and physical refining process. For the water degumming process, crude sunflower oils were heated to 80°C, and a 4% by volume water was added to the mixture. This combination was then stirred for 30 minutes in a semi-continuous mixer with a flow rate of approximately 4 tons/h.
  • What is a sunflower oil refining unit?
  • An experimental oil refining unit has been developed for minimal refining of sunflower oil. The unit consists of (i) one open mild steel tank with conical bottom for degumming/neutralization, (ii) one closed oval tank for vacuum drying/bleaching and (iii) one filter for filtration of oil.