sunflower seeds oil, Sunflower seeds come in 2 types: the non-oil seed that are eaten as confectionery products after roasted with the shell or without the shell as kernels, and the oil seed that are processed into oil and meal which is a by-product of sunflower seed oil extraction primarily used as an ingredient in livestock feed rations.
Refining the sunflower seeds oil is to remove color, odor and bitterness. Refining involves heating the oil to 40°C -85°C (107-188 degree Fahrenheit) and mixing an alkaline substance such as sodium hydroxide or sodium carbonate with the oil. Then soap forms form the undesired fatty acids and the alkaline additive, and usually it is removed by centrifugal process. The oil will be further cleaned to remove soap traces and then dried.
The oil is also de-gummed at this time by treating it with water-heated steam of 85°C -95°C (188-206 degree Fahrenheit), or water with acid. Most of the gum is the phosphatides to be precipitated out, and the dregs are removed by centrifugal process.
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