Organic oxygen absorber comprising porous carrier and method for preparing the same

Abstract

Disclosed herein are an organic oxygen absorber and a preparation method thereof. The organic oxygen absorber is prepared by reacting each of an ascorbic acid compound and an oxygen absorption promoting material with porous silica powder, which has high adsorbability, at room temperature so as to be impregnated into the silica powder, and then mixing the impregnated materials with each others before filling into an air-permeable packaging material. The organic oxygen absorber does not influence an oxygen detector or the like, has high oxygen absorbability and is prepared with high efficiency.

What is claimed is: 
     
         1 . An organic oxygen absorber comprising a porous carrier, the organic oxygen absorber comprising:
 an oxygen-absorbing material prepared by allowing 100 wt % of silica and 100-200 wt % of an aqueous solution of sodium L-ascorbate to react with each other at room temperature so as to impregnate the sodium L-ascorbate into the silica; and   a catalyst material prepared by allowing 100 wt % of silica and 100-200 wt % of an aqueous solution of ferrous sulfate heptahydrate to react with each other at room temperature so as to impregnate the ferrous sulfate heptahydrate into the silica, wherein the oxygen-absorbing material and the catalyst material are mixed with each other at a predetermined ratio before filling into an air-permeable packaging material.   
     
     
         2 . The organic oxygen absorber to  claim 1 , wherein the aqueous solution of sodium L-ascorbate consists of water and sodium L-ascorbate mixed at a ratio of 4:1-1:1. 
     
     
         3 . The organic oxygen absorber to  claim 1 , wherein the aqueous solution of ferrous sulfate heptahydrate consists of water and ferrous sulfate heptahydrate mixed at a ratio of 8:1-1:1. 
     
     
         4 . A method for preparing an organic oxygen absorber comprising a porous carrier, the method comprising the steps of:
 allowing 100 wt % of silica and 100-200 wt % of an aqueous solution of sodium L-ascorbate to react with each other at room temperature so as to impregnate the sodium L-ascorbate into the silica, thereby preparing an oxygen-absorbing material;   allowing 100 wt % of silica and 100-200 wt % of an aqueous solution of ferrous sulfate heptahydrate to react with each other at room temperature so as to impregnate the ferrous sulfate heptahydrate into the silica, thereby preparing a catalyst material; and   mixing the oxygen-absorbing material with the catalyst material at a predetermined ratio before filling into an air-permeable packaging material.   
     
     
         5 . The method of  claim 4 , wherein the aqueous solution of sodium L-ascorbate consists of water and sodium L-ascorbate mixed at a ratio of 4:1-1:1. 
     
     
         6 . The method of  claim 5 , wherein the aqueous solution of ferrous sulfate heptahydrate consists of water and ferrous sulfate heptahydrate mixed at a ratio of 8:1-1:1.