| abstract |
In the production of break-resistant and abrasion-resistant shaped structures of active carbon, comprising the steps of molding a finely divided, carbon-containing starting material with a binder, hardening the molding, eliminating volatile constituents from the molding composition and activating the moldings at a temperature of about 700 DEG to 1200 DEG C with at least one of steam and carbon dioxide, the improvement which comprises molding the carbon-containing material with a binder comprising a mixture of a phenol and an aldehyde or a condensation product thereof. The carbon-containing starting material may contain volatiles and hardening is effected in two stages with elimination of volatiles, the first stage up to about 150 to 200 DEG C and the second stage up to about 600 to 700 DEG C. The moldings are characterized by a benzene-adsorption capacity in excess of about 25 %, a methylene blue number of at least about 10, an abrasion of less than about 0.6 %, a breakage of less than about 0.8 % and a compression hardness of at least about 15 kp. |