Active carbon preparation method

Abstract

The invention provides an active carbon preparation method. The active carbon preparation method comprises the following steps: placing pretreated raw materials in a carbon dioxide atmosphere with a concentration of 70 to 90%, adding aluminum hydroxide as an activator, carrying out activation at 400 to 600 DEG C for 1 to 2 h, then cooling the activated product to 290 DEG C or below, and immersingthe same in a strong inorganic acid for 1 to 2 h to obtain active carbon. The materials of the invention can be recycled, thereby greatly reducing the production cost, and the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of activated carbon preparation, in particular to an activated carbon preparation method. Background technique [0002] Activated carbon is a black porous solid carbon that has been activated. Generally in the form of powder, granular or pellet, the main component is carbon, and also contains a small amount of oxygen, hydrogen, sulfur, nitrogen and chlorine. The raw materials for the early production of activated carbon were wood, hard nut shells or animal bones. Later, coal was mainly used. The production methods are: ①Steam and gas activation. The carbon is activated by water vapor or carbon dioxide at 850-900°C. ② chemical activation method. Activated carbon can be obtained by using the gas released by the activator, or impregnating the raw material with the activator, and after high temperature treatment. [0003] The disadvantages of the traditional chemical method of producing activated carbon are that the c...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the traditional chemical method of manufacturing activated carbon are that the consumption of activators is large, the recovery rate is low, and the waste water and gas generated are harmful to the environment.