Active white clay is made of clay (mainly bentonite) as raw material, after inorganic acidification treatment, and then by water rinsing, drying made of adsorbent, the appearance of milky white powder, adsorption performance is very strong, can absorb colored substances. Easy to absorb moisture in the air, placed too long will reduce the adsorption performance. However, heating to more than 300 degrees Celsius will begin to lose crystal water, is the structure changes, affecting the fading effect. Active clay series products, the product is gray, pink or white powder or granular, insoluble in water, easy to absorb moisture; It has a large specific surface area and more activated acid center, so it has strong adsorption and catalytic ability, so it has a good decolorization ability, and high activity, low oil rate, fast filtration speed, it is an ideal decolorization agent.

Active clay is widely used for decolorization and purification in animal and plant oil refining industry. In the petroleum industry, used for petroleum resin, paraffin, paraffin oil, kerosene decolorization and purification; Dyeing agent, oil filler and dye for carbon paper in the paper industry. In forestry and water and soil protection used as fire extinguisher powder, eliminate oil in water adhesive cleaner; In the chemical industry used as catalyst and catalytic carrier, pesticide, pesticide and fungicide carrier, rubber and plastic filler, desiccant and filter, sorbent for radioactive waste; In water purification and sewage treatment as absorbent and flocculant. The use of appropriate heating (80-100 degrees is appropriate) resurrection, if heated to more than 300 degrees began to lose crystal water, its structure changes, affecting the decolorization effect.