Composition containing lanthanide metal complex

Patent metadata

Field	Value
Publication number	US-11441105-B2
Application number	US-201716771520-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Dec 15, 2017
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

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.

First claim

The invention claimed is:

1. 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:
R 1 is SO 3 X or COOX;
R 2 is H, methyl, SO 3 M or COOX;
X is H or an alkli metal; and
M is an alkli metal.

2. The composition according to claim 1 , wherein the metal is selected from Ce, Pr and Nd.

3. The composition according to claim 1 , wherein the alkali metal is selected from Li, Na and K.

4. The composition according to claim 1 , wherein the aromatic compound is selected from the group consisting of compounds of tiron, 3,4-dihydroxybenzenesulfonic acid, sodium 6,7-dihydroxynaphthalene-2-sulfonate, sodium 2,3-dihydroxybenzoate, potassium 3,4-dihydroxbenzoate, 2,3-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 2,2′-bipyridine-4-carboxylic acid, 2,2′-bipyridine-5,5′-dicarboxylic acid and 2,2′-bipyridine-4,4′-dicarboxylic acid.

5. The composition according to claim 4 , wherein the aromatic compound is selected from the group consisting of compounds of tiron, sodium 6,7-dihydroxynaphthalene-2-sulfonate, 2,3-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid and 2,2′-bipyridine-4,4′-dicarboxylic acid.

6. The composition according to claim 1 , wherein the source of hydrogen peroxide is selected from the group consisting of hydrogen peroxide, inorganic peroxide salts, organic peroxides, and mixtures thereof.

7. The composition according to claim 6 , wherein the source of hydrogen peroxide is hydrogen peroxide.

8. The composition according to claim 1 , wherein the composition comprises:
(a) from 0.1 to 70% by weight of the source of hydrogen peroxide, with respect to the total weight of the composition; and
(b) from 0.01-5% by weight of the lanthanide metal complex calculated by lanthanide metal, with respect to the total weight of the composition.

9. The composition according to claim 8 , wherein the composition comprises:
(c) from 1 to 50% by weight of the source of hydrogen peroxide, with respect to the total weight of the composition; and
(d) from 0.1-1% by weight of the lanthanide metal complex calculated by lanthanide metal, with respect to the total weight of the composition.

10. The composition according to claim 1 , wherein the composition comprises:
(e) from 0.01-5% by weight of the source of hydrogen peroxide, with respect to the total weight of the composition; and
(f) from 0.2-0.5% by weight of the lanthanide metal complex calculated by lanthanide metal, with respect to the total weight of the composition.

11. The composition according to claim 1 , wherein the composition further comprises a detergent.

12. The composition according to claim 1 , wherein the composition further comprises water.

13. A method for treating a substrate, comprising the step of contacting the substrate with the composition according to claim 1 .

14. The method according to claim 13 , wherein the substrate is a textile, a pulp or a paper.

15. A method for removing cooked-, baked-, or burnt-on food soil from cookware or tableware, the method comprising a step of contacting the cookware tableware with a composition according to claim 1 .

Assignees

• Rhodia Operations

Inventors

• Hong Bing
• Lerch Alexander
• Streiff Stéphane
• Ji peng fei
• Liebens Armin T

Classifications

• C11D3/3915

  Sulfur-containing compounds · CPC title

• C11D3/3942

  Inorganic per-compounds (C11D3/3902 takes precedence) · CPC title

• C11D3/392 Primary

  Heterocyclic compounds, e.g. cyclic imides or lactames · CPC title

• C11D3/391

  Oxygen-containing compounds · CPC title

• C11D1/00

  Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent · CPC title