Method of cleaning and disinfecting beverage dispensing systems

• US 7,737,101 B2
• Filed: 07/26/2001
• Issued: 06/15/2010
• Est. Priority Date: 10/13/2000
• Status: Expired due to Fees

• Current Assignee: Dipl. Ing. Thonhauser GmbH
• Original Assignee: Dipl. Ing. Thonhauser GmbH
• Inventors: Thonhauser, Manfred, Thonhauser, Christian
• Primary Examiner(s): Ogden, Jr.; Necholus
• Application Number:
  US10/398,348
• Publication Number:
  US 20040033930A1
• Time in Patent Office: 3,246 Days
• Field of Search: 510/302, 510/311, 510/375, 510/380, 510/446, 510/379
• US Class Current: 510/218
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence
• CPC Class Codes: C11D 3/3947 Liquid compositions
• CPC Class Codes: C11D 3/48 Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
• CPC Class Codes: C11D 7/06 Hydroxides

Abstract

A detergent and disinfectant in which water-soluble permanganates are used in an alkaline solution in order to initiate the oxidation of organic substances and simultaneously a chemical oxidant, preferably a peroxodisulfate, is used which is capable of producing radical reactions with catalytic support by manganates originating from the supplied permanganate, which reactions produce the oxidation of organic substances. All components are present in powder form and a respective powder mixture can be dissolved rapidly and free from residues in water. It thus represents a universally applicable, highly effective detergent and disinfectant.

Claims

1. A method of cleaning a beverage dispensing system, comprising obtaining a composition comprising a first oxidant comprising a water-souble permanganate, an alkaline agent, and a second oxidant whose oxidation potential exceeds that of a mixture containing 50 mol % manganese VII and 50 mol % manganese VI;

said composition changes color upon contact during oxidation of an organic substance.

2. The method as claimed in claim 1, wherein the second oxidant comprises peroxodisulfates.

3. The method as claimed in claim 1, wherein the water-soluble permanganate comprises potassium permanganate.

8. The method as claimed in claim 1, wherein the composition comprises:

20%-35% of 50% KOH,

5%-25% of 50% potassium tripolyphosphate,

25%-35% of hypochlorite lye, and at least 0.01% KMnO₄.

9. The method as claimed in claim 8, wherein the composition is used in form of a 3% aqueous solution.

10. The method as claimed in claim 1, wherein the composition comprises:

58% NaOH,

27% potassium tripolyphosphate,

15% Na₂S₂O₈, and at least 0.01% KMnO₄.

11. The method as claimed in claim 1, wherein the composition comprises:

28% of 50% KOH,

15% of 50% potassium tripolyphosphate,

30% of hypochlorite lye, and at least 0.01% KMnO₄.

12. The method as claimed in claim 1, wherein said alkaline agent is formulated to secure an alkaline environment with a pH value of at least 12.

13. The method as in claim 1, wherein an oxidation potential of the at second oxidant exceeds that of a mixture containing 50 mol % H02- and 50 mol % OH—

.

16. The method of claim 1, wherein the composition changes color on contact with the organic, wherein said color change allows a visual evaluation of an amount of the organic oxidized by the composition.

17. The method as claimed in claim 1, wherein the color change is from purple to a second color other than purple.

18. The method as claimed in claim 17, wherein the second color is green.

19. The method as claimed in claim 17, wherein the second color is yellow.

20. The method of claim 1, wherein the water-soluble permanganate reacts with the organic substance.

21. The method of claim 2, wherein the organic substance and the peroxodisulfate reacts with the organic substance.

22. The method as claimed in claim 1, wherein the organic substance, the second oxidant comprises peroxodisulfate, and both the water-soluble permanganate and the peroxodisulfate react with the organic substance.

23. The method as claimed in claim 1, wherein the second oxidant comprises a hypochlorite.

24. The method as claimed in claim 23, further comprising a peroxodisulfate.

25. The method of claim 1, wherein the alkaline agent has a composition configured to secure an alkaline environment with a pH value of at least 10.

26. The method of claim 1, wherein the obtained the color change is visually evaluated.

27. The method of claim 1, further comprising adding the composition in a form of a powder to water.

28. The method of claim 27, wherein the powder dissolves in the water free from a residue.

29. The method of claim 26, wherein the method is configured to monitor a cleaning progress during a cleaning operation.

30. The method of claim 29, wherein the cleaning operation comprises cleaning in a brewery.

31. The method of claim 26, wherein the method is configured to sterilize a container.

32. The method of claim 31, wherein the container is sterilized by spraying the container with the composition and spraying off the composition applied to the container with water.

4. The method as claimed claim in 1, wherein the alkaline agent comprises an alkali hydroxide.

14. The method as in claim 4, wherein the alkali hydroxide comprise NaOH.

5. The method as claimed claim in 1, further comprising an oxidation resistant polyphosphate.

15. The method as in claim 5, wherein the oxidation resistant polyphosphate comprises potassium tripolyphosphate.

6. The method as claimed claim in 1, wherein all components of the composition are present in powder form.

7. The method as claimed claim in 1, wherein 7 to 8 grams of the composition is dissolved per liter of the aqueous liquid.