Use of manganese oxalates as bleach catalysts

摘要

The invention relates to the use of manganese oxalates in detergents and cleaning agents, in particular in cleaning agents containing peroxy compounds for hard surfaces.

主权项

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.