Electrolytic degradation systems and methods usable in industrial applications

• US 8,828,316 B2
• Filed: 07/03/2013
• Issued: 09/09/2014
• Est. Priority Date: 09/03/2009
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Herdt, Brandon L., Li, Junzhong
• Primary Examiner(s): Chorbaji, Monzer R
• Application Number:
  US13/935,396
• Publication Number:
  US 20130291488A1
• Time in Patent Office: 433 Days
• Field of Search: 422/1, 422/22, 422/28, 422/186.04, 210/748.01, 210/748.06, 210/749, 205/687, 137/237, 204/194, 204/242, 204/280
• US Class Current: 422/28
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/32 Ingredients for reducing the noxious effect of the active substances to organisms other than pests, e.g. toxicity reducing compositions, self-destructing compositions
• CPC Class Codes: A01N 37/02 Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
• CPC Class Codes: A01N 37/16 containing the group; Thio analogues thereof
• CPC Class Codes: A01N 59/00 Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
• CPC Class Codes: A61L 2/186 Peroxide solutions
• CPC Class Codes: B65B 55/02 Sterilising, e.g. of complete packages
• CPC Class Codes: B65B 55/10 by liquids or gases
• CPC Class Codes: B67C 2003/228 Aseptic features
• CPC Class Codes: C25B 15/00 Operating or servicing cells
• CPC Class Codes: C25B 9/00 Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
• CPC Class Codes: Y10T 137/4238 With cleaner, lubrication added to fluid or liquid sealing at valve interface

Abstract

The present disclosure relates to the use of a split and single electrical cells in industrial applications, and particularly in aseptic packaging applications.

Claims

1. A method of selectively degrading hydrogen peroxide in an antimicrobial composition, comprising:

(a) providing an antimicrobial composition comprising hydrogen peroxide, carboxylic acid, and peracid;

(b) providing a split cell comprising a first loop comprising an anode in fluid communication with the antimicrobial composition, and a second loop comprising a cathode in fluid communication with a reducing solution, the first loop and the second loop being in electrical communication with one another using a salt bridge; and

(c) providing an electric potential from a power supply thereby causing the reducing solution to accept electrons from the antimicrobial composition in order to selectively remove hydrogen peroxide from the antimicrobial composition by degradation.

2. The method of claim 1, comprising using the split cell to degrade at least 500 ppm of the hydrogen peroxide in less than 15 minutes.

3. The method of claim 1, comprising using the split cell to maintain predetermined amounts of the hydrogen peroxide, the carboxylic acid, and the peracid.

4. The method of claim 3, wherein the predetermined amounts of the hydrogen peroxide, the carboxylic acid, and the peracid are:

(i) from about 0.00001 to about 0.5 wt. % hydrogen peroxide;

(ii) from about 0.1 to about 20.0 wt. % of a C₁-C₁₀ carboxylic acid; and

(iii) from about 0.1 to about 2.0 wt. % of a C₁-C₁₀ peracid.

5. The method of claim 1, further comprising monitoring the amounts of the hydrogen peroxide, the carboxylic acid or the peracid and adjusting the electric potential in order to maintain predetermined amounts of the hydrogen peroxide, the carboxylic acid, and the peracid.

6. The method of claim 5, wherein the electric potential is adjusted by a regulator.

7. The method of claim 1, wherein the method is part of an aseptic packaging method.

8. A system for maintaining predetermined amounts of hydrogen peroxide, carboxylic acid, and peracid in an antimicrobial composition, comprising:

a split cell comprising a first loop and a second loop that are in electrical communication with one another using a salt bridge, wherein the first loop contains an anode and the second loop contains a cathode;

a power supply that transmits an electric potential between the first loop and the second loop; and

a sump,

wherein the first loop contains an antimicrobial composition, the antimicrobial solution containing predetermined amounts of hydrogen peroxide, carboxylic acid and peracid;

wherein the first loop and the antimicrobial composition are in fluid communication with the sump; and

wherein the second loop contains a reducing solution, the reducing solution being capable of accepting electrons from the antimicrobial solution and capable of transmitting electrical current through the salt bridge into the first loop.

9. The system of claim 8, wherein the predetermined amounts of hydrogen peroxide, carboxylic acid, and peracid are:

(i) from about 0.00001 to about 0.5 wt. % hydrogen peroxide;

(ii) from about 0.1 to about 20.0 wt. % of a C₁-C₁₀ carboxylic acid; and

(iii) from about 0.1 to about 2.0 wt. % of a C₁-C₁₀ peracid.

10. The system of claim 8, wherein the carboxylic acid is selected from the group consisting of acetic acid, octanoic acid, and mixtures thereof, and the peracid is selected from the group consisting of peracetic acid, peroctanoic acid, and mixtures thereof.

11. The system of claim 8, further comprising a regulator that measures amounts of hydrogen peroxide or peracid and adjusts the electric potential in order to maintain the predetermined amounts of hydrogen peroxide, carboxylic acid, and peracid.

12. An aseptic packaging system, comprising:

a sump;

a sterilizing area;

a first line that transfers an antimicrobial composition from the sump to the sterilizing area, wherein the antimicrobial composition comprises predetermined amounts of desired components;

a second line that transfers the antimicrobial composition from the sterilizing area back to the sump or to a drain;

a split cell integrated into the sump, the first line, or the second line, wherein the split cell comprises a first loop comprising an anode in fluid communication with the antimicrobial composition, and a second loop comprising a cathode in fluid communication with a reducing solution, the first loop and the second loop being in electrical communication with one another using a salt bridge, and wherein the split cell maintains the predetermined amounts of desired components in the antimicrobial composition;

a third line that transfers a rinse to the sterilizing area;

a fourth line that transfers used rinse away from the sterilizing area; and

a single cell integrated into the fourth line, wherein the single cell degrades predetermined amounts of desired components in the used rinse.

13. The aseptic packaging system of claim 12, wherein the desired components of the antimicrobial composition are hydrogen peroxide, carboxylic acid, and peracid and the desired components of the used rinse are hydrogen peroxide and peracid.

14. A method of disinfecting packages through an aseptic or extended shelf life filling system comprising:

(a) forming an antimicrobial composition in a sump, the antimicrobial composition comprising;

(i) hydrogen peroxide;

(ii) carboxylic acid; and

(iii) peracid;

(b) transporting the antimicrobial composition from the sump to a sterilizing area using an aseptic line;

(c) applying the composition to a surface of a food package in the sterilizing area on a packaging line in an amount sufficient to render a final food product located in the food package suitable for distribution and sale under non-refrigerated storage conditions;

(d) integrating a split cell into the packaging line, the split cell comprising a first loop comprising an anode in fluid communication with the antimicrobial composition, and a second loop comprising a cathode in fluid communication with a reducing solution, the first loop and the second loop being in electrical communication with one another using a salt bridge; and

(e) using the split cell to maintain predetermined amounts of hydrogen peroxide, carboxylic acid, and peracid in the antimicrobial composition

(f) transporting the antimicrobial composition from the sterilizing area back to the sump through a second line.

15. The method of claim 14, wherein the split cell comprises

a first loop and a second loop that are in fluid communication with one another using a salt bridge, wherein the first loop contains an anode and the second loop contains a cathode;

and

a power supply that transmits an electric potential between the first loop and the second loop;

wherein the first loop contains the antimicrobial composition and the second loop contains a reducing solution is in fluid communication with the second loop, the reducing solution being capable of accepting electrons from the antimicrobial composition and capable of transmitting electrical current through the salt bridge into the first loop.

16. The method of claim 14, further comprising activating the split cell in response to a reading from a sensor that senses the amounts of hydrogen peroxide, carboxylic acid or peracid.

17. The method of claim 14, further comprising activating the split cell in a time-based manner.

18. The method of claim 14, wherein the predetermined amounts of hydrogen peroxide, carboxylic acid, and peracid are:

(i) from about 0.00001% to about 0.5 wt. % hydrogen peroxide;

(ii) from about 0.1% to about 20.0 wt. % of a C₁-C₁₀ carboxylic acid; and

(iii) from about 0.1% to about 2.0 wt. % of C₁-C₁₀ peracid.

19. The method of claim 14, wherein the carboxylic acid is selected from the group consisting of acetic acid, octanoic acid, and mixtures thereof, and the peracid is selected from the group consisting of peracetic acid, peroctanoic acid, and mixtures thereof.