Three Main Categories of Decolorization Products

Decolorization products are divided into three main categories according to the principle of decolorization:

1. Flocculating decolorizer, a quaternary amine cationic polymer compound that combines decolorization, flocculation and COD degradation in a single product. By chemically reacting with molecules of colour-forming groups such as dyestuffs, the colour-forming groups are destroyed. At the same time, it can physical reactions such as adsorption and bridging are produced with the colour-forming molecules, therefore flocculating and settling the coloured substances. These reacted molecules are organic, so the decoloring agent can achieve the purpose of reducing COD and decolorization.

2. Oxidizing decolorizer, using oxidizing substances, such as sodium chlorate, potassium permanganate, ozone, etc., to destroy the coloured groups to achieve the purpose of removing the colour.

3. Adsorption type decolorizer, for example activated carbon, white clay or adsorption resin, which can be used to filter out impurities and oxides in the oil directly by filtration. They combines functions of impurity removal, odour removal, decolorization and separation, turning the blackened oil into a light coloured and transparent liquid, and the acid value and colour of the processed diesel oil meets the national fuel standards.