What kinds of impurities are present in crude sunflower oil?

Whether using the pressing method or the leaching method, that you obtained are crude sunflower oil. In crude sunflower oil, there are some kinds of impurities, such as the impurities that oilseeds themselves bring into, and the solvent residual after leaching.

Usually, sunflower oil refinery machine can remove the impurities and produce the qualified refined sunflower oil.

crude oilThe mechanical impurities in crude sunflower oil that we can see

Generally speaking, there are four kinds of impurities present in crude sunflower oil. They are mechanical impurities, moisture impurities, colloidal impurity and fat-soluble impurities. Next, I will introduce them one by one.

The type of impurities The effect of impurities The way to remove the impurities
Mechanical impurities Mechanical impurities refer to sediment, billet powder, cake residue, fiber, grass clippings and other solid impurities that are mixed into the oil during sunflower oil making process or storage. Such impurities are insoluble in fats and oils, so they can be removed by filtration or sedimentation method.
Moisture impurities The presence of moisture impurities makes the oil color darker, produces odor, promotes rancidity, reduces the quality and use value of the vegetable oil. And it is not conducive to vegetable oil safe storage. The sunflower oil refinery plant often uses heating to remove moisture impurities in atmospheric pressure or reduced pressure condition.
Colloidal impurity The colloidal impurities are easily affected by moisture, temperature and electrolytes.  Colloidal impurities presence in the crude sunflower oil is often removed by hydration or addition of an electrolyte for acidification or alkali refining.
Fat-soluble impurities The presence of free fatty acids in fat-soluble impurities affects the flavor and edible value of the oil and increase the speed of oil rancidity. In vegetable oil refining process, fat-soluble impurities are often removed by alkali refining and distillation.

The sunflower oil refinery machine manufactured by Henan Doing Comapny uses advanced refining technology to remove these impurities in crude sunflower oil, and can make you get satisified refined sunflower oil. Welcome to contact us! Whatsapp: 008613526627860

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