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US 11,441,105 B2Granted
Composition containing lanthanide metal complex
AssigneeRhodia Operations
InventorsBing Hong, Alexander Lerch, Stéphane Streiff, Peng Fei Ji, Armin T. Liebens
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Abstract
Provided is the use of a lanthanide metal complex as a bleaching catalyst. In particular, the lanthanide metal complex comprises a ligand which is an aromatic compound having at least one electron withdrawing substituent and at least one nucleophilic group. Provided is also a composition containing the lanthanide metal complex.
Claims15
A composition comprising-:
- a) a source of hydrogen peroxide;
- and
- b) a lanthanide metal complex comprising-:
- a metal selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and
- an aromatic compound as a ligand, wherein the aromatic compound has general formula (I), (II), or (III):
- wherein:
- R1 is SO3X or COOX;
- R2 is H, methyl, SO3M or COOX;
- X is H or an alkli metal;
- and
- M is an alkli metal.
8 more elements
Dependencies are inferred from the claim text.