Two step method of cleaning, sanitizing, and rinsing a surface

• US 10,358,622 B2
• Filed: 07/26/2017
• Issued: 07/23/2019
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Stokes, Jennifer, Silvernail, Carter M., Olson, Erik C., Lange, Steven J., Li, Junzhong, Sun, Xin, Brewster, Allison, Staub, Richard
• Primary Examiner(s): Cleveland, Timothy C
• Application Number:
  US15/660,469
• Publication Number:
  US 20170321165A1
• Time in Patent Office: 727 Days
• CPC Class Codes: C11D 2111/44 Multi-step processes
• CPC Class Codes: C11D 3/044 Hydroxides or bases
• CPC Class Codes: C11D 3/08 Silicates
• CPC Class Codes: C11D 3/10 Carbonates ; Bicarbonates
• CPC Class Codes: C11D 3/365 containing carboxyl groups
• CPC Class Codes: C11D 3/3947 Liquid compositions
• CPC Class Codes: C11D 3/48 Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions

Abstract

Methods employing detergent compositions comprising phosphinosuccinic acid oligomers (PSO) in combination with a sanitizing rinse aid are disclosed. The methods beneficially clean, sanitize and rinse a surface in an efficient two-step process. The detergent compositions employ phosphinosuccinic acid adducts, namely mono-, bis- and oligomeric phosphinosuccinic acid (PSO) derivatives, in combination with an alkalinity source and optionally polymers and/or surfactants. The sanitizing and rinsing compositions employ peroxycarboxylic acid compositions in combination with a nonionic defoaming and wetting surfactant.

Claims

1. A system for cleaning, sanitizing and rinsing a surface comprising:

(a) a detergent composition comprising;

an alkalinity source selected from the group consisting of an alkali metal carbonate, alkali metal hydroxide, alkali metal silicate, alkali metal metasilicate, and combinations thereof;

a phosphinosuccinic acid adduct comprising a phosphinosuccinic acid and mono-, bis- and oligomeric phosphinosuccinic acid adducts; and

(b) a sanitizing rinse composition comprising;

a C1-C22 peroxycarboxylic acid;

a C1-C22 carboxylic acid;

hydrogen peroxide; and

at least one nonionic defoaming surfactant and at least one nonionic wetting surfactant.

2. The system of claim 1, wherein the phosphinosuccinic acid (I) and mono- (II), bis- (III) and oligomeric (IV) phosphinosuccinic acid adducts have the following formulas:

3. The system of claim 2, wherein the phosphinosuccinic acid adduct comprises at least 10 mol % of an adduct comprising a ratio of succinic acid to phosphorus from about 1:

1 to 20;

1.

4. The system of claim 3, wherein the phosphinosuccinic acid adduct of formula I constitutes between about 1-40 wt-% of the phosphinosuccinic acid adduct, the phosphinosuccinic acid adduct of formula II constitutes between about 1-25 wt-% of the phosphinosuccinic acid adduct, the phosphinosuccinic acid adduct of formula III constitutes between about 10-60 wt-% of the phosphinosuccinic acid adduct, the phosphinosuccinic acid adduct of formula IV constitutes between about 20-70 wt-% of the phosphinosuccinic acid adduct.

5. The system of claim 1, wherein a use solution of the detergent composition has a pH between about 9 and 12.5.

6. The system of claim 1, wherein the detergent composition further comprises an additional nonionic surfactant, an anionic surfactant, water, an oxidizer, and/or combinations thereof.

7. The system of claim 1, wherein the sanitizing rinse composition is a concentrate having less than about 2 wt-% peroxyacetic acid.

8. The system of claim 1, wherein the sanitizing rinse composition when diluted from about 0.01% weight/volume to about 2% weight/volume provides at least a 5-log reduction in pathogenic organisms at a temperature of at least about 100°

F.

9. The system of claim 1, wherein the nonionic defoaming surfactant(s) and the nonionic wetting surfactant(s) of the sanitizing rinse composition comprises an alkyl-ethylene oxide-propylene oxide copolymer surfactant and an alcohol ethoxylate according to the following structure R—

O—

(CH₂CH₂O) _n—

H, wherein R is a C₁-C₁₂ alkyl group and n is an integer in the range of 1 to 100.

10. A system for cleaning, sanitizing and rinsing a surface comprising:

(a) a concentrated detergent composition comprising;

an alkalinity source selected from the group consisting of an alkali metal carbonate, alkali metal hydroxide, alkali metal silicate, alkali metal metasilicate, and combinations thereof;

a phosphinosuccinic acid adduct comprising a phosphinosuccinic acid and mono-, bis- and oligomeric phosphinosuccinic acid adducts having the following formulas

11. The system of claim 10, wherein a use solution of the detergent composition comprises from about 100 ppm to about 20,000 ppm of the alkalinity source, and from about 1 ppm to about 2,000 ppm of the phosphinosuccinic acid adducts.

12. The system of claim 11, wherein the phosphinosuccinic acid adduct of formula I constitutes between about 1-40 wt-% of the phosphinosuccinic acid adduct, the phosphinosuccinic acid adduct of formula II constitutes between about 1-25 wt-% of the phosphinosuccinic acid adduct, the phosphinosuccinic acid adduct of formula III constitutes between about 10-60 wt-% of the phosphinosuccinic acid adduct, the phosphinosuccinic acid adduct of formula IV constitutes between about 20-70 wt-% of the phosphinosuccinic acid adduct.

13. The system of claim 10, wherein the phosphinosuccinic acid adduct constitutes between about 0.1-40 wt-% of the detergent composition, the alkalinity source constitutes between about 1-90 wt-% by weight of the detergent composition, and the detergent composition further comprises an additional nonionic surfactant.

14. The system of claim 10, wherein the system reduces or prevents hardness accumulation and/or soil redeposition on the surface, and provides a spot-free and film-free surface.

15. The system of claim 10, wherein the nonionic defoaming surfactant of the sanitizing rinse composition is an alkyl-ethylene oxide-propylene oxide copolymer surfactant and wherein the nonionic wetting surfactant of the sanitizing rinse composition is an alcohol ethoxylate according to the following structure R—

O—

(CH2CH2O) n-H, wherein R is a C1-C12 alkyl group and n is an integer in the range of 1 to 100.

16. The system of claim 15, wherein the alkyl-ethylene oxide-propylene oxide copolymer surfactant of the sanitizing rinse composition has a single hydroxyl functional group per molecule according to the following structure Alkyl-(EO)m-(PO)n-POH, wherein m is an integer in the range from 1 to 20 and n is an integer in the range from 1 to 20.

17. The system of claim 10, wherein the ratio of the nonionic defoaming surfactant(s) to the nonionic wetting surfactant(s) of the sanitizing rinse composition is from about 1.5:

1 to about 10;

1.

18. The system of claim 10, wherein the C₁-C₂₂ peroxycarboxylic acid of the sanitizing rinse composition is a C₂-C₂₀ peroxycarboxylic acid, and wherein the C₁-C₂₂ carboxylic acid of the sanitizing rinse composition is a C₂-C₂₀ carboxylic acid.

19. The system of claim 10, wherein the sanitizing rinse composition further comprises at least one additional agent selected from the group consisting of a hydrotrope or coupling agent, a solvent, a stabilizing agent and combinations thereof.

20. The system of claim 10, wherein the C₁-C₂₂ peroxycarboxylic acid comprises from about 1 wt-% to about 40 wt-%, the C₁-C₂₂ carboxylic acid comprises from about 1 wt-% to about 80 wt-%, the hydrogen peroxide comprises from about 1 wt-% to about 80 wt-%, and the nonionic surfactant/0 comprise from about 1 wt-% to about 50 wt-% of the sanitizing rinse composition.