PROBLEM TO BE SOLVED: To provide an organic oxygen absorber which does not influence a metal detector and the like, has excellent oxygen absorbability, does not cause a shrinkage phenomenon in packaging materials, eliminates the need of equipment that replaces with nitrogen to provide oxygen-free conditions, has high flowability so as to be mechanically easily filled in packaging materials such as small bags and to be excellent in production efficiency, and uses a porous carrier and to provide a preparation method thereof.SOLUTION: An organic oxygen absorber includes: an oxygen-absorbing material formulation prepared by allowing 100 wt.% of porous silica and 100-200 wt.% of an ascorbic acid-based compound to react with each other at room temperature so as to impregnate the ascorbic acid-based compound into the silica and a catalyst material formulation prepared by allowing 100 wt.% of porous silica and 100-200 wt.% of an iron salt compound to react with each other at room temperature so as to impregnate the iron salt compound into the silica, wherein the oxygen-absorbing material formulation and the catalyst material formulation are mixed with each other at a predetermined ratio.COPYRIGHT: (C)2014,JPO&INPIT【課題】金属探知機などへの影響がなく、酸素吸収能力に優れており、包装体内において収縮現象を引き起こさず、無酸素雰囲気の造成のための窒素置換などの施設が不要であり、流動性に優れていることから小袋などの包装材への機械充填性に優れていて製造効率性に優れた、多孔性担体を用いた有機系酸素吸収剤及びその製造方法を提供すること。【解決手段】多孔性シリカ100重量%とアスコルビン酸系化合物100~200重量%を常温下で互いに反応させ、アスコルビン酸系化合物をシリカに含浸して製造した酸素吸収物質配合物と、多孔性シリカ100重量%と鉄塩化合物100~200重量%を常温下で互いに反応させ、鉄塩化合物をシリカに含浸して製造した触媒物質配合物と、を含んでなり、酸素吸物質配合物と媒物質配合物を、所定の割合で混合してなることを特徴とする多孔性担体を用いた有機系酸素吸収剤。【選択図】なし
