Production of strong active carbon moldings

Details Production of strong active carbon moldings Production of strong active carbon moldings

B - Operations, Transporting

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B01J 21/18 (2006.01) B01J 37/00 (2006.01) C01B 31/14 (2006.01) C04B 35/532 (2006.01)

Patent

CA 1037938

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 to 1200°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 har- dening is effected in two stages with elimination of volatile, the first stage up to about 150 to 200°C and the second stage up to about 600 to 700°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.

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