C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
18/1160, 252/26
C01B 31/08 (2006.01) C01B 31/00 (2006.01) C01B 31/02 (2006.01) C01B 31/14 (2006.01) C04B 35/52 (2006.01) C10C 3/00 (2006.01) D01F 9/145 (2006.01)
Patent
CA 1036771
ABSTRACT OF THE DISCLOSURE 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 50-350°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°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°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 temper- ature higher than 600°C to obtain a porous carbon material. The porous carbon material or the infusible porous material may be activated by means of steam vapour or air to produce an activated carbon material.
182147
Amagi Yasuo
Nishimura Yasushi
Uehara Yasuo
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