| 摘要 |
PURPOSE: To obtain activated carbon improved in adsorptivity by carbonizing an ion exchange resin through its heat treatment in an inert gas followed by activating the carbonized resin in the presence of an alkali metal compound. CONSTITUTION: An unused or used ion exchange resin selected from cation exchange resins, anion exchange resins and hybrid-type ion exchange resins, etc., is first dried and then carbonized in an inert gas such as N2 gas while raising temperature to about 450-1000 (esp. about 600-900 deg.C) at a rate of about 5-10 deg.C/min. Subsequently, the carbonized resin is cooled, washed with water and dried. Next, the carbonized resin is mixed with an alkali metal compound such as KOH at the mass ratio of the latter to former of 2-10, and the mixture is held in an inert gas such as N2 gas for 10-180min or so while raising temperature to about 400-800 deg.C at a rate of about 1-10 deg.C/min to accomplish activation; the resultant carbonized material is cooled, washed with water and dried, thus obtaining the objective activated carbon >=1000m<2> /g in specific surface area with fine pores of uniform size. |
