| 摘要 |
PROBLEM TO BE SOLVED: To improve adsorption capacity per unit weight of activated carbon in an adsorptive cleaning treatment of humus in water by baking and carbonizing the mixture of a urea resin and a binding agent and then activating the resultant product. SOLUTION: This method for manufacturing activated carbon comprises a mixing stage for mixing 1.5-2.0 pts.wt. binding agent with 1 pts.wt. urea resin, a granulating stage for granulating the mixture obtained, a baking carbonizing stage for baking and carbonizing a granular material obtained at 600-800 deg.C in an atmosphere of an inert gas (e.g. nitrogen, argon) and an activating stage for activating the carbide obtained with gas activation (e.g. water vapor, oxygen, carbon dioxide) or chemical activation (e.g. zinc chloride). A melamine resin may be mixed with the urea resin as a mixing resin. In this case, 0.05-0.5 pts.wt. melamine resin is added to 1 pts.wt. urea resin. Adsorption capacity of fulvic acid is improved by adding the melamine resin. As a binding agent, tar, pitch, lignin, molasses and pulp waste liquid or the like is used. |
