| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new peroxy acid, capable of exhibiting excellent deterging and bleaching powers at low temperature, and useful as a bleaching agent when used for a detergent composition. SOLUTION: This compound is 6,6'-terephthal-di(amidoperoxyhexanoic) acid. This peroxy acid can be obtained by reacting an aliphatic carboxylic acid with an excessive quantity of hydrogen peroxide in a strongly acidic reaction medium. For example, 6,6'-terephthal-di(amidohexanoic) acid is dissolved in a 98.0 wt.% concentrated sulfuric acid at ambient temperature, and mixed with concentrated sulfuric acid, water and concentrated hydrogen peroxide solution, while cooling the mixture at ambient temperature, to prepare a Caro's acid solution. A carboxylic acid solution is added to the Caro's acid solution with stirring, to obtain highly pure 6,6'-terephthal-di(amidoperoxyhexanoic) acid from the reaction mixture. This peroxy acid can be used for a bleaching or deterging composition for fabrics, sterilizing or sanitary composition, and reagent for oxidation, or polymerization or crosslinking of an ethylenically unsaturated compound. |
