Patent ID: 8927478
Filing Date: 2015-01-06
Classification: C11D

Abstract:
1. A process for enhancing the bleaching action of an inorganic peroxygen compound in the bleaching of colored stains comprising the step of adding a bleach catalyst, wherein the bleach catalyst is a manganese(II) oxalate dihydrate or a manganese(II) oxalate trihydrate, to a washing and/or cleaning composition comprising the inorganic peroxygen compound wherein the inorganic peroxygen compound is hydrogen peroxide, alkali metal perborate mono- or tetrahydrate and/or alkali metal percarbonate, and wherein bleaching components of the washing and/or cleaning composition consist of: said inorganic peroxygen compounds; from 0.025 to 2.5% by weight of manganese (II) oxylate dihydrate or a manganese (II) oxylate trihydrate; and optionally (i) a bleach stabilizer selected from phosphonates, borates, metaborates, metasilicates and magnesium salts and/or (ii) a bleaching activator which releases an optionally substituted perbenzoic acid and/or peroxocarboxylic acid under perhydrolysis conditions.