| abstract |
(57) [Summary] SOLUTION: A silver-containing spinning pitch (B) obtained by adding a silver compound to a coal-based or petroleum-based heavy oil (A), followed by an oxidation treatment and a polymerization treatment is used as a raw material. An antibacterial activated carbon fiber in which finely particulate metallic silver having a diameter of 1 μm or less is dispersed inside the fiber. Add a silver compound to heavy oil (A) whose viscosity at 100 ° C is 500 poise or less and oxidize it (nitration) After that, a polymerization treatment is performed at 250 ° C. to 400 ° C. to obtain a spinning pitch (B) having a silver content of 1% by weight or less and a softening point of 220 ° C. to 350 ° C., then pitch fibers, infusible fibers, and further activation treatment. . A water purifier using the above antibacterial activated carbon fiber. [Effect] Since finely particulate metallic silver having a diameter of 1 μm or less is stably dispersed inside the fiber, it is excellent in durability and antibacterial property, and is effective for applications such as a water purifier. |