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, Zhengzhou Amisy can provide
professional technical support and manufacture first rate
machines for your oil refining.
Oil Refining Plants Features
1. Wide application : various kinds of oil can be refined
by our oil refining machines.
2.Multifunction: including degumming, neutralization,
bleaching, deodorization and dewaxing(optional)
3. No need of specially designed workshop.
Main Steps of Oil Refining
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.
