| 摘要 |
PURPOSE:To prepare the title molding at a low cost in a short time with a small-size oven, by removing a viscosity modifier from a spherical molding comprising petroleum- or coal-derived pitch and a viscosity modifier to prepare a porous molding and baking the porous molding in a particular heater for activation. CONSTITUTION:A di- or tricyclic arom. compd. (B) having a b.p. of 200 deg.C or above is removed from a spherical molding comprising 100 pts.wt. petroleum- or coal-derived pitch (A) and 5-50 pts.wt. component (B) as a viscosity modifier to prepare a porous molding. The porous molding is then made infusible to prepare an infusible spherical pitch. This molding is baked at 600-800 deg.C in a first-stage fluidized bed 2 of a two- stage fluidized bed activator 1 with a waste gas from a second-stage fluidized bed 3, thereby preparing a spherical carbon molding. After the activated molding of the previous batch is transferred outside the oven to empty the oven, the carbon molding is transferred to the empty fluidized bed 3, where the carbon molding is activated at 800-1200 deg.C with a heated activation gas at an ascending velocity not higher than the terminal fluidization gas velocity of the spherical activated carbon molding of the fluidized bed 3 and not lower than the incipient fluidization gas velocity of the infusible spherical pitch molding, thereby preparing pitch molding as spherical activated carbon molding. |
