METHOD OF MANUFACTURING ACTIVATED CARBON

PROBLEM TO BE SOLVED: To provide a method of manufacturing good-quality and also inexpensive activated carbon by an energy saving process as compared with a conventional method enabling the effective utilization of a pyrolysis residue of a rubber product containing heavy metals such as a waste tire and a waste plastic. SOLUTION: The activated carbon is obtained through a mixing step of mixing the pyrolysis residue of the rubber product and a halogen-containing plastic, a heating step of obtaining a heat-treated substance by heat-treating the mixture obtained at the mixing step under an almost oxygen-free condition, a metal salt recovering step of recovering a metal salt extract solution by adding water or dilute acid to the heat-treated substance, a metal removing step of eluting a residual metal component contained in an extraction residue remaining at the metal salt recovering step with acid and a step of washing the residue after removing the metal remaining after the metal removing step and drying the residue. The metal salt formed at the heating step is used as an activation chemical and the metal salt extract solution obtained by selectively recovering the metal salt at the metal recovering step is added at the mixing step to reuse. COPYRIGHT: (C)2008,JPO&INPIT