Method for the preparation of carbon moldings and activated carb

Details Method for the preparation of carbon moldings and activated carb Method for the preparation of carbon moldings and activated carb

1976-03-18

1977-01-04

Douglas, Winston A.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

106307, 252421, 252444, 252445, 423445, 264 291, C01B 3102, C01B 3110, B01J 2118

Patent

active

RE0291013

ABSTRACT:
A method for the preparation of a porous carbon molding having a low apparent density, the method comprising the steps of thermally mixing a pitch, which has a softening point of 50.degree. - 350.degree. C, a carbon content of 80 - 97 wt%, a hydrogen/carbon ratio of 0.3-2.5 and a nitrobenzene-insoluble fraction of below 60 wt%, with at least one aromatic hydrocarbon having a boiling point of 200.degree. C or higher, forming the mixture into a suitable shape, immersing the formed material in a solvent, in which the pitch is hardly soluble but the aromatic hydrocarbon is easily soluble, for extracting the aromatic hydrocarbon from the formed material and obtaining a porous pitch material, oxidizing the porous pitch material at a temperature from room temperature to 400.degree. C by the use of an oxidizing agent to form an infusible porous pitch material, and calcining the infusible porous material in an inert atmosphere at a temperature higher than 600.degree. C to obtain a porous carbon material. The porous carbon material or the infusible porous material may be activated by means of steam vapor or air to produce an activated carbon material.

REFERENCES:
patent: 3403093 (1968-09-01), Mills
patent: 3558276 (1971-01-01), Otani et al.
patent: 3663171 (1972-05-01), Granger
patent: 3668110 (1972-06-01), Shea et al.
patent: 3775344 (1973-11-01), Amagi et al.
patent: 3786134 (1974-01-01), Amagi et al.

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