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Corn germ oil refining process

TIME:2014-10-18 10:11:22FROM: AUTHOR:
Corn germ oil refining process: crude oil, hydration degumming, alkali refining, washed twice, dehydration, bleaching, filtration, deodorization, refined corn o...

Corn germ oil refining process: crude oil, hydration degumming, alkali refining, washed twice, dehydration, bleaching, filtration, deodorization, refined corn oil
Hydration: Corn oil contains free fatty acids, glycerol impurities and colloidal forms of non-protein and phospholipid binding phlegmatic, etc. present in corn oil, these gelatinous substance in the heating process will produce bubbles in the alkali refining of oil will and lye emulsified corn oil refining influence. Therefore, corn oil prior to refining, the first hydration degumming. When the hydration of corn oil was heated to 75 ~ 80
, the amount of water is 5 to 10% of the oil volume. Need to add water while stirring, followed by adding the right amount of salt. Hydration and swelling of the gel into the water, the water and oil containing colloidal separation, the purpose of the hydration deacidification.
Corn germ oil refining process - alkali refining: Corn oil often contains large amounts of free fatty acids, an acid number of about 6, in general, some up to 10, an alkali refining process, to generate free fatty acids and alkali soap flocculent, and the fat absorption impurities, so that grease further purification.

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Bleaching: After alkali refining corn oil is also used clay to make oil bleaching, bleaching clay pigment in addition to fat absorption, but also to make a small amount of soap grease and other colloidal removal. Bleaching process is the removal of trace water. Bleaching is carried out under vacuum, an appropriate increase in temperature can increase the bleaching bleaching effect, but the temperature is too high, the rise in oil acid value, you should choose the best operating temperature and bleaching time in accordance with the actual situation, it will get a good bleaching effect .
Corn germ oil refining process - deodorized: corn oil, after hydration, alkali refining, bleaching free fatty acids, phospholipids, proteins, liquid clay, pigment Most were removed, the appearance of yellow transparent. But which also retains a peculiar smell of corn germ oil, there are stick-ene, aldehydes and ketones and other volatile substances, such as corn oil without sweetening process, poor flavor taste, even with high nutritional value will not be spending who welcomed the removal of corn oil in order to effectively odor, can be high-temperature, high-vacuum steam stripping approach deodorization. General temperature 180
, the degree of vacuum 9.3 × 104 Pa to achieve more satisfactory results.