Patent ID: 8993504
Filing Date: 2015-03-31
Classification: B01J,C11D,D06L,D06M

Abstract:
1. An oxidation catalyst for bleaching, comprising: a component (a) which is 2,2′-iminodisuccinic acid tetrasodium salt or methylglycinediacetic acid trisodium salt, and a component (b) which is copper sulfate, wherein component (a) is 2,2′-iminodisuccinic acid tetrasodium salt, or methylglycine diacetic acid trisodium salt, wherein the copper compound comprises copper sulfate, wherein the oxidation catalyst is capable of releasing metal ions in an aqueous solution, and wherein the molar ratio of component (a) to component (b) is from 5:1 to 91.2:1.