Bleach activation

Details Bleach activation Bleach activation

C - Chemistry, Metallurgy

11

D

C11D 3/39 (2006.01) B01J 23/745 (2006.01) B01J 31/18 (2006.01) B01J 31/22 (2006.01) C11D 3/26 (2006.01) C11D 3/395 (2006.01) C11D 7/54 (2006.01) D06L 3/02 (2006.01)

Patent

CA 2248476

A bleach and oxidation catalyst is provided comprising a catalytically active iron complex including a defined pentadentate nitrogen containing ligand. This type of iron complex can activate hydrogen peroxide or peroxy acids and was found to have favourable stain removal and remarkable dye transfer inhibition properties. In addition, a considerably improved stability of these iron complex compounds in alkaline aqueous environment has been obtained, in particular at the peroxy compound concentrations generally present in the fabric washing liquor.

Divulgation d'un catalyseur de blanchiment et d'oxydation comprenant un complexe de fer catalytiquement actif constitué d'un ligand azoté pentadenté. Ce type de complexe de fer peut activer le peroxyde d'hydrogène ou les peroxyacides. On a découvert que ce complexe présente des propriétés d'élimination efficace des taches et d'inhibition remarquable du transfert pigmentaire. En outre, on a obtenu une stabilité considérablement améliorée de ces complexes dans des milieux aqueux alcalins, en particulier, aux concentrations du composé peroxy généralement présentes dans la liqueur de lavage des tissus.

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