METHOD FOR CARBONIZING SYNTHETIC RESIN

摘要

PURPOSE:To obtain a spherical carbonaceous material having a large pore volume and high mechanical strength by depositing concd. sulfuric acid on a synthetic resin having a specified content of divinylbenzene under reduced pressure, and carbonizing the material in an inert gas current at an appropriate temp. CONSTITUTION:A synthetic resin such as macroporous cross-linked spherical polystyrene contg. 10-30% divinylbenzene as the crosslinking agent is used as the starting material. Concd. sulfuric acid is deposited on the polymer at about 600Torr vacuum, and the material is carbonized in the current of an inert gas such as N2 at 600-800 deg.C. A decrease in the pore volume due to the melting of the synthetic resin can be prevented by this method and pores are grown. The carbonaceous material obtained by this method can be rapidly activated when activated carbon is produced from the material.