Select the sunflower seeds with the oil content of 30-50%,and the seed material contains certain impurities
(sediment,stones,iron fillings,ets) which should be removed by cleaning sieve and magnetic separator.
For sunflower seed,it should be squeezed after shelling,which can increase production capacity and oil quality. After the sunflower seeds are sieved by vibrating screen and then placed into a vertical centrifugal sheller to separate the shells.
Rolling the embryo is to grind the broken oilseeds into embryonic flakes with a certain thickness, which is an important process of pretreatment. Its role is to destroy the cell tissue so that the oil can be easily extracted.
Heat treatment is one of the most important processes in the extraction of oils,including the wetting and heating of the sunflower seed. In the production, it is called embryo steming or frying, and the steamed and fried embryo is called a matured embryo.
In production, people mainly adopt pre-squeezing and solvend leaching methods for oil extraction of sunflower seed. Pre-press can squeeze out some of the oil in the raw material to improve the oil effect.
The steps of sunflower oil refining are basically the sames as those of the other vegetable oils, including degumming, alkali refining, decolorization, deodorization, and dewaxing. The refined product is not only light in color, but also has high nutritional value and good taste.