The principle of deodorization is the steam distillation method, so that water vapor through the oil layer, bring out the odor components. Deodorization should try to increase the operating temperature and reduce the operating pressure, so that get out the maximum odor components.

In the deodorization process, adding antioxidants is to prevent oxidation, to extend the storage period of oil, antioxidants use citric acid.

Deodorizing vacuum equipment adopt steam jet pump. A amount of water will be further volatile during deodorization. Deodorizing heating medium for the heat transfer oil, which the feature are high temperature, low pressure, save energy.