Concentrated detergent composition for the improved removal of starch in warewashing applications

Patent metadata

Field	Value
Publication number	US-9969958-B2
Application number	US-201314888537-A
Country	US
Kind code	B2
Filing date	May 2, 2013
Priority date	May 2, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The invention provides a concentrated detergent composition comprising
alkali metal carbonate, alkali metal percarbonate, and a peroxidation catalyst according to formula (I) [(L p M q ) n X r ]Y s , wherein each L independently is an organic ligand containing at least three nitrogen atoms that coordinate with the metal M; M is Mn or Fe; each X independently is a coordinating or bridging group selected from the group consisting of H 2 O, OH − , SH − , HO 2 − , O 2− , O 2 2− , S 2− , F − , Cl − , Br − , I − , NO 3 − , NO 2 − , SO 4 2− , SO 3 2− , PO 4 3− , N 3 − , CN − , NR 3 , NCS − , RCN, RS − , RCO 2 − , RO − , and

with R being hydrogen or a C 1 to C 6 alkyl group; p is an integer from 1 to 4; q is an integer from 1 to 2; r is an integer from 0 to 6; Y is a counter ion; and s is the number of counter ions. The invention also relates to the use of said concentrated detergent composition as a warewashing detergent for the removal of starch soil.

First claim

The invention claimed is:

1. A concentrated detergent composition comprising:
from about 15% to about 70% by weight of an alkali metal carbonate, from about 36% by weight to about 60% by weight of an alkali metal percarbonate, from 0.0005 to 0.12% by weight of the metal M in the form of a peroxidation catalyst according to formula (I)
[(L p M q ) n X r ]Y s   (I);

from about 1.5% to about 15% by weight of one or more surfactants; and
from about 2% to about 10% by weight of water,
wherein the composition is a solid block and provides a pH of from about 8 to about 10.5 when diluted in distilled water at a concentration of 1 g/l;
wherein
each L independently is an organic ligand containing at least three nitrogen atoms and/or at least two carboxyl groups that coordinate with the metal M;
M is Mn or Fe;
each X independently is a coordinating or bridging group selected from the group consisting of H 2 O, OH − , SH − , HO 2 − , O 2− , O 2 2− , S 2− , F − , Cl − , Br − , I − , NO 3 − , NO 2 − , SO 4 2− , SO 3 2− , PO 4 3− , N 3 − , CN − , NR 3 , NCS − , RCN, RS − , RCO 2 − , RO − , and

with R being hydrogen or a C 1 to C 6 alkyl group;
p is an integer from 1 to 4;
q is an integer from 1 to 2;
n is an integer from 1 to 4;
r is an integer from 0 to 6;
z denotes the charge of the complex [(L p M q ) n X r ];
Y is a counter ion;
and
s is the number of counter ions.

2. The concentrated detergent composition according to claim 1 , wherein the peroxidation catalyst is a complex according to formula (II)

wherein L 1 and L 2 can either be separate ligands or where L 1 and L 2 can combine to be a single molecule.

3. The concentrated detergent composition according to claim 2 , wherein Y is selected from the group consisting of Cl − , Br − , I − , No 3 − , ClO 4 − , NCS 31 , BPh 4 − , BF 4 − , PF 6 − , R 2 —SO 3 − , R 2 —SO 4 − , and R 2 —CO 2 − , wherein R 2 is hydrogen or a C 1 to C 4 alkyl group.

4. The concentrated detergent composition according to claim 2 , wherein L is a ligand according to formulae (II) to (IV)

wherein each R 1 is independently selected from the group consisting of hydrogen and C 1 -C 6 alkyl.

5. The concentrated detergent composition according to claim 4 , wherein Y is selected from the group consisting of Cl − , Br − , I − , NO 3 − , ClO 4 − , NCS − , BPh 4 − , BF 4 − , PF 6 − , R 2 —SO 3 − , R 2 —SO 4 − , and R 2 —CO 2 − , wherein R 2 is hydrogen or a C 1 to C 4 alkyl group.

6. The concentrated detergent composition according to claim 5 , wherein the composition comprises 0.0005 to 0.12% by weight of the metal M in the form of a peroxidation catalyst complex.

7. The concentrated detergent composition according to claim 1 , wherein L is a ligand according to formulae (II) to (IV)

wherein each R 1 is independently selected from the group consisting of hydrogen and C 1 -C 6 alkyl.

8. The concentrated detergent composition according to claim 1 , wherein the composition comprises from 0.001 to 0.05% by weight of the metal M in the form of a peroxidation catalyst complex.

9. The concentrated detergent composition according to claim 1 , wherein the composition comprises 20% to 60% by weight of the alkali metal carbonate.

10. The concentrated detergent composition according to claim 1 , wherein the composition provides a pH of from about 9.5 to 10.5 when diluted in distilled water at a concentration of 1 g/l.

11. The concentrated detergent composition according to claim 1 , wherein the composition further comprises at least one of surfactants, activating agents, chelating/sequestering agents, silicates, detergent fillers or binding agents, defoaming agents, anti-redeposition agents, enzymes, dyes, odorants, or mixtures thereof.

12. The concentrated detergent composition according to claim 1 , wherein the surfactant is a nonionic surfactant.

13. A ware wash method for the removal of starch soil comprising applying of the concentrated detergent composition, according to claim 1 , on wares.

14. The method according to claim 13 , wherein the concentrated detergent composition is diluted to provide a solution with a concentration of 0.1 to 10 g/l.

15. The method according to claim 13 , wherein the concentrated detergent composition is applied at a temperature of 20 to 85° C.

16. The method according to claim 13 , wherein the concentrated detergent composition is applied for a washing time of 10 seconds to 5 minutes.

17. A concentrated detergent composition comprising
from about 10% to about 80% by weight of an alkali metal carbonate,
from about 36% to about 60% by weight of an alkali metal percarbonate,
from 0.0005 to 0.12% by weight of the metal M in the form of a peroxidation catalyst according to formula (II);
from about 1.5% to about 15% by weight of one or more surfactants; and
from about 2% to about 10% by weight of water,
wherein the composition is a solid block and provides a pH of from about 8 to a bout 10.5 when diluted in distilled water at a concentration of 1 g/l;

wherein L1 and L2 can either be separate ligands or where L1 and L2 can combine to be a single molecule,
wherein M is Mn or Fe;
each X independently is a coordinating or bridging group selected from the group consisting of H 2 O, OH − , SH − , H 2 O − , O 2− , (O 2 ) 2− , S 2− , F − , Cl − , Br − , l − , (NO 3 ) − , (NO 2 ) − , (SO 4 ) 2− , (SO 3 ) 2− , (PO 4 ) 3− , (N 3 ), CN − , NR 3 , NCS − , RCN, RS − , (RCO 2 ) − , RO − , and

with R being hydrogen or C 1 to C 6 alkyl group;
Y is a counter ion.

Assignees

• Ecolab Usa Inc
• Ecolab Usa Inc

Inventors

• Dotzauer David
• Foster Tobias
• Gohl David W
• Kullwitz Dirk
• Mansergh John

Classifications

• C11D3/3932

  Inorganic compounds or complexes · CPC title

• C11D3/3942

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

• C11D3/10 Primary

  Carbonates {; Bicarbonates} · CPC title

• C11D3/3947

  Liquid compositions · CPC title

• C11D3/168

  Organometallic compounds or orgometallic complexes · CPC title