The activated carbon is a kind of adsorbents which has ample internal pore structure and high specific surface area, widely applying on chemical industry, pharmaceuticals, metallurgy industry, agriculture and environmental protection. The effects of operation parameters such as impregnation ratio, activation temperature and time on the adsorption properties of activated carbons, and burning time were measured and analysed in order to optimize these operation conditions. We can make such conclusions: The optimum technological conditions of preparation by chemical activation were: KOH/ZnCl_2 was the better activator, activator ZnCl_2 5mol/L, solid/liquid 1:1g/mL, soaking time 1.0h, soaking temperature 20°C, pyrolysis temperature 550°C, the optimum washing temperature 90°C.
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