Activated carbon is a porous material and has large surface area and strong absorbing. It can be used for desulfurizeing, debenzolization, deodorization and decolourizeing. It can also be used in selective elimination of some chemical impurities in liquid or gas phase in the chemical oil and gas, metallurgical, water treatment and environmental protection industries as well as the daily life. It can be separated into eight series according to its function, series function Series-1 desulfurizeing Series-2 solvent recovery Series-3 catalyst carrier Series-4 water purification Series-5 gas purification Series-6 prevention of toxicant Series-7 effluent recovery Series-8 liquor refining