Medium chain peroxycarboxylic acid compositions

Patent metadata

Field	Value
Publication number	US-9491965-B2
Application number	US-201414270036-A
Country	US
Kind code	B2
Filing date	May 5, 2014
Priority date	Jan 9, 2004
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

The present invention relates to compositions including medium chain peroxycarboxylic acid, methods for making these compositions, and methods for reducing the population of a microorganism. The compositions can include advantageously high levels of the medium chain peroxycarboxylic acid, can be readily made, and/or can exhibit reduced odor.

First claim

The invention claimed is:

1. A composition comprising:
about 0.5 to about 5 wt-% peroxyoctanoic acid;
about 1 to about 10 wt-% octanoic acid;
about 5 to about 50 wt-% water;
about 7 to about 35 wt-% hydrogen peroxide
about 0.5 to about 10 wt-% sequestrant; and
about 1 to about 20 wt-% surfactant,
wherein the composition has a pH of about 3 or less, and wherein the composition is free of short-chain carboxylic acids having 4 or fewer carbon atoms.

2. The composition of claim 1 , consisting of at least about 2 parts by weight of peroxyoctanoic acid for each 7 parts by weight of octanoic acid.

3. The composition of claim 1 , wherein the composition has a pH of 1 or less.

4. The composition of claim 1 further comprising about 10 to about 40 wt-% inorganic acid.

5. The composition of claim 4 , wherein the inorganic acid is phosphoric acid.

6. The composition of claim 1 , wherein the sequestrant is 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP).

7. The composition of claim 1 further comprising about 30 to about 40 wt-% inorganic acid.

8. The composition of claim 1 , wherein the composition comprises from 10 to 25 wt-% hydrogen peroxide.

9. A method for sanitizing an article comprising:
a) preparing a use solution by diluting a concentrate composition with an aqueous diluent where the use solution comprises about 0.5 to about 4 wt-% of the concentrate composition, the concentrate composition comprising
about 0.5 to about 5 wt-% peroxyoctanoic acid;
about 1 to about 10 wt-% octanoic acid;
about 5 to about 50 wt-% water;
about 10 to about 35 wt-% hydrogen peroxide
about 0.5 to about 10 wt-% sequestrant;
about 1 to about 20 wt-% surfactant, and
about 10 to about 40 wt-% inorganic acid; wherein the composition is free of short-chain carboxylic acids having 4 or fewer carbon atoms;

b) contacting the use solution with the article;
c) allowing sufficient contact time to sanitize the article; and
d) optionally rinsing the article.

10. The method of claim 9 , wherein the article comprises equipment and wherein the method comprises a clean-in-place (CIP) procedure.

11. The method of claim 9 , wherein the use solution is applied at a temperature of about 4° C. to about 60° C., and wherein the composition remains in solution at the temperature.

12. The method of claim 11 , wherein the use solution contacts the article for the duration of a contact time, and wherein contact time is between about 30 s to about 120 s.

13. The method of claim 9 , wherein the concentrate composition further comprises a foaming agent.

14. The method of claim 13 , wherein the foaming agent is selected from alkyl benzene sulfonate, secondary alkane sulfonate, alkylated diphenyl oxide disulfonate, alkyl ether sulfate, sodium lauryl sulfate, and a combination thereof.

15. The method of claim 14 , wherein the foaming agent comprises alkyl benzene sulfonate and wherein the alkyl benzene sulfonate forms a microemulsion, a viscoelastic gel, or viscoelastic liquid.

16. The method of claim 9 , wherein the article comprises food.

17. The method of claim 16 , wherein the use composition is applied to the article by spraying or by immersing the article in the use solution.

18. The method of claim 9 , wherein the method comprises an aseptic packaging procedure.

19. The method of claim 18 , wherein the use solution is applied at a temperature of about 25° C. to about 70° C.

20. The method of claim 18 , wherein the use solution contacts the article for the duration of a contact time, and wherein contact time is between about 5 s to about 120 s.

Assignees

• Ecolab Usa Inc

Inventors

• Man Victor F
• Magnuson Joshua P
• Lentsch Steven E

Classifications

• A61L2/183

  Ozone dissolved in a liquid · CPC title

• A61L2202/18

  Aseptic storing means · CPC title

• A61L2/186

  Peroxide solutions · CPC title

• A01N37/16

  containing the group [IMAGE cpc-sch-A01N-0934.gif]; Thio analogues thereof · CPC title

• A61L2/235

  cellular, porous or foamed · CPC title