Overview
Oil Refining is the progress of removing impurities such as phospholipids, FFA, pigment, and off-flavor in cruel oil before edible application. An oil refining machine is used for producing the first or second-grade edible oil. We are able to supply the professional oil refining plant and related oil refining equipment. With a high degree of automation, the oil refining machinery can refine 20 kinds of oil, such as soybean, rape seeds, peanut, etc. in a small production line or in a large oil plant.
Features
This progress adopts hydration by adding hot water to remove the agglomerated and deposited hydrosol and phosphatide because of their water affinity. The separated gum (after being dried) can be made into lecithin or added to cakes or meals in the extraction workshop. The hydration degumming process can improve oil edibility, and storage and do well for the downstream neutralization section.
Oil containing fatty acid is mixed mechanically with a slight excess of alkali to react with fatty acids present to form soaps. The mixture is centrifuged to separate oil from soapstock. After washing with water, the water is separated from the oil in a second centrifuge.
Degummed and neutralized oil is pumped into this system and mixed with the use of bleaching earth, a special soap, gum, and pigment-attracting adsorbent. The mixture enters the Pre-filtration Dryer where the moisture in the oil and adsorbent is evaporated. Then the oil is pumped through an automatically closed filter to remove clay.
The oil contains the disagreeable flavor and odors that are naturally present or created during processing. All odoriferous matter is distilled off by injecting high-pressure steam through the vacuum system. Then the product achieves the national standard.
Cottonseed oil is classified as a vegetable oil. It is extracted from the cotton plant, or more accurately from the seeds, and is generally used for cooking Seed oils are preferred for diets that require lowered intakes of saturated fats. This makes cottonseed a kind of good oil for preparing healthier foods.
Cottonseed oil contains pressing cottonseed oil, solvent extraction cottonseed oil, genetically modified organism cottonseed oil, crude cottonseed oil, and the finished product of cottonseed oil. Its color is deep redder than other oils, can be used as cooking oil after refining, as well as contains a large sum of fatty acids that are essential to the human body, better to mix animal fats. Yet, if people eat crude cottonseed oil, it will cause damage to spermatogenic cells, and lead to aspermia and sterility.
Refined cottonseed oil is usually pale yellow or dark red. Its fatty acid generally includes 21.6-24.8% palmitic acid, 1.9-2.4% stearic acid, 0.1 %arachidic acid,18.0-30.7%oleic acid, and 44.9-55.0%linoleic acid. Refined clear cottonseed oil without gossypol and other toxic substances can be used as cooking food. Clear cottonseed oil contains a large quantity of linoleic acid, it can prevent the content of cholesterol rising, and maintain human body health. Human body consumption of cottonseed oil is up to 98%.
It is said that the refining process can reduce toxicity. Cottonseed oil is one of the main cooking oils. But crude cottonseed oil contains gossypol (approximately 1%), colloid, and waxiness (content varies with shell content), and the quality is poor. It's not better to eat it directly. The refining process technology is also complex.
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