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

• US 9,752,105 B2
• Filed: 05/02/2014
• Issued: 09/05/2017
• 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:
  US14/268,598
• Publication Number:
  US 20140238445A1
• Time in Patent Office: 1,222 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 two-step method of cleaning, sanitizing and rinsing a surface comprising:

(a) cleaning a surface with 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;

from about 0.01-40 wt-% of a phosphinosuccinic acid adduct comprising a phosphinosuccinic acid and mono-, bis- and oligomeric phosphinosuccinic acid adducts; and

(b) sanitizing and rinsing the surface with 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 method 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 method 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 method 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 method of claim 1, wherein a use solution of the detergent composition has a pH between about 9 and 12.5.

6. The method 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 method of claim 1, wherein the sanitizing rinse composition is a concentrate having less than about 2 wt-% C1-C22 peroxycarboxylic acid and less than about 2 wt-% peroxyacetic acid.

8. The method 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 method of claim 1, wherein the nonionic defoaming and 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 two-step method of cleaning, sanitizing and rinsing a surface comprising:

(a) cleaning a surface with 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;

from about 0.01-40 wt-% of a phosphinosuccinic acid adduct comprising a phosphinosuccinic acid and mono-, bis- and oligomeric phosphinosuccinic acid adducts having the following formulas

11. The method of claim 10, further comprising the first step of generating the use solution of the detergent composition comprising 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 method 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 method 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 method of claim 10, wherein the method of cleaning reduces or prevents hardness accumulation and/or soil redeposition on the surface, and wherein the method of sanitizing and rinsing provides a spot-free and film-free surface.

15. The method 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 method 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 method of claim 10, wherein the ratio of the nonionic defoaming surfactant to the nonionic wetting surfactant of the sanitizing rinse composition is from about 1.5:

1 to about 10;

1.

18. The method 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 method 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 method 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 surfactants comprise from about 1 wt-% to about 50 wt-% of the sanitizing rinse composition.