Bleach and oxidation catalyst
AssigneeChemsenti Limited
InventorsRonald Hage, Fabien Pierre Guy Gaulard
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Abstract
The present invention concerns a method of making manganese ion-containing catalyst salts, which comprise a mononuclear or dinuclear Mn (III) and/or Mn (IV) complex based on cyclic triamine ligands and a non-coordinating silicate-based counterion. The invention also concerns compositions comprising such salts and bleaching formulations comprising the salt and a peroxy compound. The salt, and formulations comprising it, are suitable for use in catalysing oxidation, for example as a component of a laundry or dishwasher bleaching composition. The invention further relates to methods of oxidising with the bleaching formulations described herein.
Claims20
A method comprising contacting an alkaline earth metal silicate with a salt comprising a mononuclear or dinuclear Mn (III) and/or Mn (IV) complex of a ligand of formula (I):
- wherein:
- Q=
- p is 3;
- R is independently selected from the group consisting of hydrogen, C1-C24alkyl, CH2CH2OH and CH2COOH;
- or one R is linked to the nitrogen atom of another Q of another ring of formula (I) via a C2-C6 alkylene bridge, a C6-C10 arylene bridge or a bridge comprising one or two C1-C3 alkylene units and one C6-C10 arylene unit, which bridge may be optionally substituted one or more times with independently selected C1-C24 alkyl groups;
- and
- R1, R2, R3, and R4 are independently selected from H, C1-C4alkyl and C1-C4-alkylhydroxy.
Dependencies are inferred from the claim text.