Compositions and methods for removing soil from surfaces

Patent metadata

Field	Value
Publication number	US-11566207-B2
Application number	US-202117305888-A
Country	US
Kind code	B2
Filing date	Jul 16, 2021
Priority date	Oct 24, 2013
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

The present invention relates to a an aqueous composition for removing soils from a surface to be cleaned, formed from water, a detergent mixture and a rinse aid, wherein the detergent mixture comprises a peroxidation catalyst and wherein the rinse aid comprises an oxygen source. Such a composition may provide a more effective cleaning behaviour. The present invention further relates to a method for removing soil from a surface to be cleaned comprising applying to the surface to be cleaned a composition according to the invention.

First claim

The invention claimed is:

1. A method for removing soil from a surface to be cleaned during a cleaning cycle comprising:
performing a first washing step comprising bringing one or more soiled ware in contact with:
(a) a detergent composition comprising about ≥20 wt. % to ≤80 wt. % of an alkalinity source, about ≥1 wt. % to ≤50 wt. % of one or more chelators, about ≥1 wt. % to ≤20 wt. % of a water conditioning agent, about ≥0.00001 wt. % to ≤1.0 wt. % of a peroxidation catalyst, and about ≥0.1 wt. % to ≤20 wt. % of a defoamer; and
(b) a rinse aid composition comprising about ≥10 wt. % to ≤60 wt. % of an oxygen source, about ≥0.5 wt. % to ≤50 wt. % of a hydrotrope, about ≥0.5 wt. % to ≤50 wt. % of a surfactant, and about ≥0.5 wt. % to ≤50 wt. % of one or more additional chelators; and

performing a first rinse step in which an unused dose of the rinse aid composition is contacted with the one or more soiled ware;
wherein the method is performed in a warewash machine.

2. The method of claim 1 , wherein the method is performed in a commercial warewash machine.

3. The method of claim 1 , wherein the rinse step is performed when the rinse aid composition is in a steady concentration state.

4. The method of claim 1 , wherein the first washing step is performed in a time range of about ≥20 seconds to ≤240 seconds.

5. The method of claim 1 , wherein the rinse step is performed in a time range of about ≥5 seconds to ≤120 seconds.

6. The method of claim 1 , wherein the peroxidation catalyst is MnTACN, MnDTNE, a bispidon ligand, FeTamL, Mn(II)oxalate, 1,2:4,5-Di-O-isopropylidene-β-D-erythro-2,3-hexodiulo-2,6-pyranose, or a Mn bleaching catalyst.

7. The method of claim 1 , wherein the oxygen source comprises a peroxygen compound.

8. The method of claim 7 , wherein the peroxygen compound is a peroxide and/or a percarboxylic acid.

9. The method of claim 1 , wherein the alkalinity source is an alkali metal hydroxide, a carbonate, a silicate, or a combination thereof.

10. The method of claim 9 , wherein the alkalinity source is an alkali metal hydroxide.

11. The method of claim 1 , wherein the alkalinity source is sodium hydroxide; the chelant is a phosphonate, sodium tripolyphosphate, methylglycinediacetic acid, or a combination thereof; the water conditioning agent is a polyacrylic acid; the defoamer is an ethylene oxide/propylene oxide block copolymer; the peroxidation catalyst is Mn(II) oxalate; the oxygen source is hydrogen peroxide; and the hydrotrope is sodium cumene sulfonate.

12. The method of claim 1 , wherein the detergent composition is present during the first washing step at a concentration of ≥0.1 g/L to ≤10 g/L.

13. The method of claim 1 , wherein the catalyst is present during the first washing step at a concentration of ≥0.000001 g/L to ≤0.1 g/L.

14. The method of claim 1 , wherein the rinse aid composition is present during the first washing step at a concentration of 0.01 g/L to 10 g/L.

15. The method of claim 1 , wherein the oxygen source is present during the first washing step at a concentration of ≥0.001 g/L to ≤6 g/L.

16. The method of claim 1 , further comprising the step of contacting the oxygen source with the catalyst to degrade soil.

17. The method of claim 1 , further comprising the step of adding the rinse aid composition directly to a sump or a rinse tank before the cleaning cycle.

18. The method of claim 17 , further comprising the step of transferring the rinse aid composition from the rinse tank or the sump to a main wash tank during a first wash cycle or a subsequent wash cycle.

19. The method of claim 18 , wherein a steady state concentration of the rinse aid composition is available in the sump after the first wash cycle.

20. The method of claim 1 , wherein the soil is a starch.

Assignees

• Ecolab Usa Inc

Inventors

• Foster Tobias Neil
• Kullwitz Dirk
• Pathicheril Beana

Classifications

• C11D3/2075

  Carboxylic acids-salts thereof · CPC title

• C11D3/08

  Silicates · CPC title

• C11D3/3945

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

• C11D3/3902

  combined with specific additives · CPC title

• C11D3/04

  Water-soluble compounds · CPC title