For the physical refining process, crude sunflower oil was degummed using the TOP degumming method. In this process, the oil was treated with 0.3% w/w phosphoric acid (75% w/w), and the H3PO4 was neutralized with 0.15% w/w sodium hydroxide (40% w/w).
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 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 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.