Continuous cotton seeds oil refinery plants
Product Description
Refining
Refining is an essential process for a complete oil pressing line because there are still some impurities such as phospholipids, FFA, pigment, odor,etc. in the crude oil.
As a prominent oil press machines manufacturer who is devoted to processing pure edible oil for worldwide customers,
we can provide professional technical support and manufacture first rate machines for your oil refining.
Main Steps of mini oil refinery
1.Crude Oil DegummingIn this step gums in crude oil are removed by hydration with the help of phosphoric acid.
2. NeutralizationIn this step free fatty acids are neutralized by using sodium hydroxide and convert them into soap.
Additional impurities are also removed by adsorption on soap.
3. BleachingDuring bleaching, unwanted pigments are adsorbed physically and oil will become much clearer.
4. DeodorizationDeodorization is used to remove unacceptable odors by steam distillation,
the odoriferous compound are stripped off with the help of live injected steam into heated oil under high vacuum pressure.
5. Dewaxing (necessary for cold areas)
Some kinds of oil like sunflower, maize germ or corn oil have waxes inside, if these impurities are not removed,
the oil will freeze easily under low temperature, thus effecting oil quality and appearance. so this process is necessary in extremely cold areas.
Edible Oil Refining Process – Dewaxing
Dewaxing can improve oil quality, so it plays in important role to the finished edible / vegetable oil quality. At the same time, dewaxing can improve oil transparency and brightness.
It is necessary to dewax for some oilseeds such maize oil, rice bran oil, sunflower oil and cotton seed oil. At present, winterizing method is very popular to dewaxing. The crystallizing rate, crystallization temperature, maturing time vary with oil features
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