Process for producing pitch based activated carbon fibers.

摘要

In accordance with the present invention, there are provided activated carbon fibers consisting of optically anisotropic components and optically isotropic components by spinning a spinning pitch into pitch fibers, and infusibilizing the resulting fibers, followed by activation treatment. The spinning pitch is prepared by melt mixing together (A) 100 parts by weight of an optically isotropic pitch having a softening point of 230-300 DEG C obtained by heat treatment of a pitch while blowing an oxygen containing gas into the pitch and (B) 10-50 parts by weight of an optically isotropic pitch having a softening point of 200-270 DEG C and preferably obtained by polymerization of naphthalene in the presence of a Lewis acid catalyst. Also according to the invention, carbon fibers consisting of optically anisotropic components and optically isotropic components are prepared by spinning the above-mentioned spinning pitch into fibers, and infusibilizing the resulting pitch fibers, followed by carbonization and/or graphitization.