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除氧剂也称脱氧剂。利用它的快速氧化反应,使密封容器内的氧含量迅速下降到0.1%以下,从而使产品不锈、不霉。我国六十年代曾研制过除氧剂。当时用亚硫酸钠作除氧剂、钻盐作催化剂—即所谓“O”型试剂,其原理如下: 催化剂、 Na_2S_2O_4+O_2→催化剂、活性碳、水 Na_2SO_4+SO_2↑ Ca(OH)_2+SO_2→CaSO_3+H_2O 由于反应物有毒,除氧速度又慢,不久就被淘汰。
Oxygen scavengers are also called deoxidizers. With its rapid oxidation reaction, the oxygen content in the sealed container is rapidly reduced to less than 0.1%, so that the product is stainless and not moldy. In the sixties of our country has developed oxygen scavenger. At that time, sodium sulphite was used as an oxygen scavenger, and salt was used as a catalyst - the so-called “O” type reagent. The principle is as follows: catalyst, Na 2 S 2 O 4 + O 2 → catalyst, activated carbon, water Na 2 SO 4 + SO 2 ↑ Ca (OH) → CaSO_3 + H_2O Due to the toxic reactants, the deoxygenation rate is slow and soon to be eliminated.