IP Library Granted Patent US 12,337,073
Granted Patent B2
US 12,337,073 · App. 18/528,173 · Granted Jun 24, 2025

Peroxycarboxylic acid based sanitizing rinse additives for use in ware washing

Inventors: Steven J. Lange (Saint Paul, MN); Junzhong Li (Saint Paul, MN); Xin Sun (Saint Paul, MN); Allison Brewster (Saint Paul, MN); Richard Staub (Saint Paul, MN)
Assignee: ECOLAB USA INC.
A61L2/186A01N37/02A01N37/16A01N59/00A61L2/18
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Quick Facts
Patent No.
US 12,337,073
App. No.
18/528,173
Granted
Jun 24, 2025
Kind
B2
Abstract

A concentrated liquid sanitizing and rinse composition containing peroxycarboxylic acid(s) and compatible rinse aid surfactants is disclosed. The sanitizing and rinsing compositions are formulated in a single liquid concentrate, replacing a traditional dual product of a sanitizer and rinse aid. The sanitizing and rinsing chemistries are particularly effective at neutral pHs against gram negative organisms at elevated temperatures. Methods of using the concentrated liquid sanitizing and rinse composition are also disclosed.

Claims (20)

1. A method of sanitizing and rinsing comprising:

providing a low odor, liquid concentrate, equilibrium peroxycarboxylic acid sanitizing rinse aid composition, wherein the composition comprises: from about 1 wt-% to about 5 wt-% of a C 1 -C 22 peroxycarboxylic acid; from about 1 wt-% to about 10 wt-% of a C 1 -C 22 carboxylic acid; less than 2 wt-% of peroxyacetic acid, acetic acid, or a combination thereof; from about 30 wt-% to about 40 wt-% hydrogen peroxide; and from about 10 wt-% to about 25wt-% of a nonionic surfactant; wherein the nonionic surfactant comprises an alkyl-ethylene oxide-propylene oxide type surfactant and an alcohol ethoxylate; and

sanitizing a surface in need thereof without an additional rinsing step.

2. The method of claim 1 , wherein the composition is diluted from about 0.01% weight/volume to about 0.2% weight/volume with a diluent.

3. The method of claim 2 , wherein the composition is diluted from about 0.01% weight/volume to about 0.05% weight/volume with a diluent.

4. The method of claim 2 , wherein the sanitized surface is spot-free and film-free.

5. The method of claim 4 , wherein the sanitizing is a low or no odor application of use.

6. The method of claim 1 , wherein the utilities for a warewashing machine employing the sanitizing are substantially similar to or less than a low temperature ware wash machine employed for chlorine-based sanitizing.

7. The method of claim 1 , further comprising at least one additional agent selected from the group consisting of a hydrotrope or coupling agent, a solvent, a stabilizing agent and combinations thereof.

8. The method of claim 1 , wherein the C1-C22 peroxycarboxylic acid is a C8 peroxycarboxylic acid and wherein the C1-C22 carboxylic acid is a C8 carboxylic acid.

9. The method of claim 1 , wherein the alcohol ethoxylate has 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. The method of claim 7 , wherein the stabilizing agent is a phosphate peroxycarboxylic acid stabilizer and/or dipicolinic acid peroxycarboxylic acid stabilizer.

11. The method of claim 1 , wherein the composition when diluted from about 0.01% weight/volume to about 0.05% weight/volume provides at least a 5 log reduction in pathogenic organisms in 30 seconds or less at a temperature of at least about 120° F.

12. The method of claim 1 , wherein the composition contains less than about 1 wt-% of peroxyacetic acid.

13. The method of claim 1 , wherein the composition is diluted to a use solution having a pH of about 5 or greater.

14. The method of claim 1 , wherein the composition is diluted to a use solution having a pH of about 5 or less.

15. The method of claim 1 , wherein the composition is diluted to a use solution at a ratio of between about 1:10 and about 1:10,000 concentrate to water.

16. The method of claim 1 , wherein the composition is diluted to a use solution at a ratio of between about 1:100 and about 1:5,000 concentrate to water.

17. The method of claim 1 , wherein the composition is diluted to a use solution at a ratio of between about 1:250 and about 1:2,000 concentrate to water.

18. The method of claim 1 , wherein the composition is diluted to a use solution wherein the use solution comprises from about 1 ppm to about 1000 ppm of the C1-C22 peroxycarboxylic acid.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 4, 2023
From: LANGE, STEVEN J.; LI, JUNZHONG; SUN, XIN; BREWSTER, ALLISON; STAUB, RICHARD
To: ECOLAB USA INC.
Reel/Frame 065754/0187 →
Continuity (3)
Continuation 17305857 · Jul 15, 2021
Continuation 13863001 · Apr 15, 2013
Related Publication 20240108769A1 · Apr 4, 2024
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