Sunflower oil is an excellent vegetable oil which is extracted from sunflower seeds that begin with sunflower seeds pre-treatment, pre-pressing, embryonic material leaching, wet meal desolventizing and crude sunflower oil refinery process. Sunflower seed oil is rich in linoleic acid, which helps reduce blood cholesterol levels in the body, and is beneficial to protect cardiovascular health. Besides the unsaturated fatty acids, sunflower oil also contains vitamins E, folic acid, iron, potassium, zinc and other essential nutrients.
Currently, the sunflower oil sold on the market is mostly produced by de-shelled pre-squeezing and leaching process. De-shelled pressing-leaching technology is the key point of sunflower oil production line which avoids the negative impact of over-refining, high temperature, and acid and alkali effects on oils, so that the nutrients in the oil can be well preserved. For example, the content of vitamin E in de-shelled squeezed sunflower oil is 75.5mg/100g. However, by squeezing-leaching seeds with shell, every 100g sunflower oil only contains 41.62mg vitamin E. What’s more, there is no contact with alkane in the process of the un-shelled pressing-leaching process, which avoids the formation of trans fatty acids.
Sunflower Oil Processing Steps
The processing characteristics of first-grade sunflower oil are: First of all, sunflower seeds are selected and cleaned to remove impurities, and then the seeds are de-husked and crushed. After that the embryo is flaked and steamed in the frying pan, the fried product is pre-squeezed out of the oil and the remaining oil is extracted by solvent leaching, then the crude oil is purified through precipitation and filtration. Finally, the oil is dissolved, degummed, decolorized, deacidified and deodorized into the refined oil. More specifically, the operation steps and equipment for processing sunflower oil are as follows: