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Wheat germ oil is a kind of wheat malt as the raw material for making corn germ oil, it focus on the wheat nourishment essence, vitamin E, linoleic acid, linolenic acid, eight carbon alcohol anda variety of physiological activity components, is a valuable function food, has the very high nutritional value. Especially for the crown of vegetable oil, vitamin E content , has been recognized as a considerable nutrition health care function of functional oils and fats.
cornt germ content in wheat: 1.5% ,Wheat germ oil content: 7-9%.The oil from wheat germ by pressing or leaching process ,which shows brown color, with wheat germ oil characteristic odour.
Normally adopt low temperature Extraction technology .
Low temperature extraction technology, the whole production process under low temperature, wheat germ oil nutrients not damaged, and the yield is high, the oil product than good.
Flowchart:
wheat germ
↓
Screening→Dryer→Grinder→Extraction→Crude oil→Purify→Refine process
↓ ↓ ↓
Meal wheat oil wheat oil refined
Pretreatment
Use vibrating screen,remove out the wheat germ's peel and flour residuel,etc. Then the germ was put into the drying pot,remove out the moisture . keep this temperature for a certain time (about 15 minutes),and the moisture content of the flake was kept at about 8%,. Then the germ go into the Grinder mill for grinding into 50mesh , send to the extraction workshop .
Flowchart for low temperature extraction
germ grinded
↓
Extraction vessel→Evaporating vessel→Desolvent→Crude oil
↑ ↓ ↓
Solvent meal air compressure /Condenser
Extraction process
1.The germ powder were put into the extraction vessel.
2. Solvent pump injects solvent into extraction vessel to soak the ger
m powder.
3. Use the solvent pumpto pump out the mixed oil from the extraction vessel into the evaporation vessel.
4.Contact the extraction vessel to the suction of compressor ,to vaporize the residual solution of the meal into the compressor, which is condensed and liquefied by compression and condenser, and the solvent is refluxed to the solvent tank for recycling.Wheat germ meal put off the extraction system.
5.Mixed oil enters evaporation system to separate solvent from crude oil after evaporation. Solvent vapor is compressed and liquefied and recycled. Grape seed crude oil is taken out of the evaporation system.
6.Crude oil clarfy process: Crude oil is filtered at low temperature, lowered to 15-20 C, so as to minimize the volatilization loss of fragrance. Adopt the filtration, settling and filtration technology , Fully filter out the non-hydrophilic phosphatide, minimum the content of phosphatide in the oil, so as to improve the stability of storage period.
7.wheat germ oil refinery
7.1. Degumming: Phospholipids gelatinous material existence, not only reduce the quality of oil, acid and alkali refining process can produce transition between oil and alkali of emulsification, increase the difficulty of separation honeylocust, increase the loss of the neutral oil, so should first remove clean.
7.2. De-Acid and decoloring: crude oil in lye, despite the organic solvent of crude oil, with warm water washing to neutral, adsorption decolourization to colorless liquid, filtering.
7.3. Removal slight odor
At this stage, appropriate high temperature vacuum, with direct injection steam distillation to remove.
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