Application value of activated clay

　　Activated clay is a kind of chemical product processed with bentonite. It has many functions of activated carbon, and its price is much cheaper than activated carbon. Therefore, it is widely used in various mineral oils, animal and vegetable oils, solid and liquid paraffin, fatty acids, waste oil regeneration, ethanol and benzene decolorization and refining. It can also be used as clarification of wine and juice, purification of sugar juice in sugar industry, catalyst carrier of chemical industry, and addition of powder pesticide.
　　There are about 40 active clay producers in China, and the annual output is about 420000 tons. The maximum production capacity is 50000 T / A. The producing areas of activated clay are mainly concentrated in the northeast, North China, East China and other regions, accounting for more than 70% of the national output. At present, the demand of activated clay in China is about 650000 T / A, and about 40000 tons are imported every year.
　　Granular clay is made of activated clay by scientific formula and chemical treatment. It has higher specific surface area and particle strength than activated clay, stable performance, good selectivity and high adsorption capacity. It is widely used in aromatics purification, aviation kerosene refining, lubricating oil, base oil, diesel oil and other oils The product is refined to remove the residual olefins, resins, asphalt, basic nitrogen compounds and other impurities in the oil.
　　At present, domestic granular clay is mainly used for olefin removal in aromatics combined unit, aviation kerosene and solvent oil refining, and pure benzene refining, which can remove a small amount of nitrogen compounds, resins and pigments. Granular clay is sometimes called oil filtering silica gel. The use of oil filtering silica gel can remove acid and oil sludge, bio colloid, insulation material extracts, water, impurities and gas chromatography analysis of hydrocarbon gas, can be used for sewage treatment and toxic gas filtration and petrochemical oil industry catalytic cracking.