| 摘要 |
PURPOSE:To provide oxygen catching compositions which are inexpensive, very useful and can control the amount and velocity of oxygen-absorption by containing alkali metal sulfides, silica, alumina, selenium and/or telluriam compound as the components of oxygen catching composition. CONSTITUTION:At least one selected from the group consisting of alkali metal sulfides such a sodium sulfide and hydrates thereof, silica, alumina, silica-alumina and silica-magnesia is added to selenium compound such as selenium dioxide and/or tellurium compound such as tellurium dioxide to produce oxygen catching composition. The proportion used of each of the components is varied depending on the purpose of the use to control the amount and velocity of oxygen-absorption, i.e. the heating value and velocity. By utilizing the oxygen-absorbing action, the oxygen catching composition is used for the preservation and the prevention against putrefaction of foods and chemicals. By utilizing the exothermic action, the composition is used as heat insulator. |
