| 摘要 |
PURPOSE:To especially enhance the decolorizing adsorbing property of melanoidin in liquid phase adsorption, by forming the decolorizing adsorbing material from an acrylonitrile type activated carbon fiber wherein a BET specific surface area, an entire pore area and ash component are within a specific range. CONSTITUTION:After an acrylonitrile fiber is oxidized in an oxidative atmosphere, the oxidized fiber is activated in activating gas to obtain a decolorizing adsorbing agent composed of an acrylonitrile type carbon fiber. This decolorizing adsorbing agent has characteristic values such that a BET specific surface area is 1,000-2,000m<2>/g, an entire pore volume (Va) is 0.70-2.50cm<2>/g, the percentage Vt/Va of the volume (Vt) occupied by transitional pores with a pore size of 40-2,000Angstrom to Va is 25% or more and ash is 2.0wt% or less. This decolorizing adsorbing agent can be suitably used in liquid phase adsorption centering around a food industry, especially, in the decolorizing adsorption of melanoidin. |
