Vegetable oils and fats mainly contain triglycerides, but triglycerides in a pure state are colorless in liquid state and white in solid state. However, the common vegetable oils have different colors. These different colors are mainly due to the various pigments contained in the oils. However, the decolorization function of refined oil equipment can remove these pigments. So, what substances are removed by the decolorization process?

What substances are removed in the decolorization process of refined oil equipment

  1. Organic degradation products

Organic degradants are the degradation products of proteins, phospholipids, sugars and other components in degraded oilseeds. The pigments formed by these degradation products are difficult to remove with adsorbents.

  1. Organic pigments Organic pigments mainly include chlorophyll and carotenoids. A few oils also contain special pigments, such as gossypol in cottonseed oil, which makes the oil dark brown. Most of these oil-soluble pigments enter the oil during the oil production process, and some are produced during the oil production process, such as chlorophyll is transformed into a red variant of chlorophyll by high temperature, and free fatty acids are formed by the interaction of iron ions Dark iron soap and more. Refined oil equipment
  2. Chromogens

Chromogens are colorless under normal conditions, but will have bright colors due to oxidation or the action of specific reagents. Although these pigments are non-toxic, they can greatly affect the appearance of oils.

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