Generation of peroxyformic acid through polyhydric alcohol formate

• US 10,433,547 B2
• Filed: 11/07/2016
• Issued: 10/08/2019
• Est. Priority Date: 12/18/2014
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Li, Junzhong, Brewster, Allison, Staub, Richard, Lange, Steven J., Cheritu, Taz, Fast, Jonathan P., Hanson, Catherine
• Primary Examiner(s): Bonaparte, Amy C
• Application Number:
  US15/345,263
• Publication Number:
  US 20170050927A1
• Time in Patent Office: 1,065 Days
• Field of Search: None
• CPC Class Codes: A01N 37/00 Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing cyclopropane carboxylic acids or derivatives thereof, e.g. cyclopropane carboxylic acid nitriles, A01N53/00
• 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: A61K 8/38 Percompounds, e.g. peracids
• CPC Class Codes: A61L 2/00 Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for contact lenses A61L12/00; atomisers for disinfecting agents A61M; sterilisation of packages or package contents in association with packaging B65B55/00; treatment of water, waste water, sewage or sludge C02F; disinfecting paper D21H21/36; disinfecting devices for water closets E03D; articles having provision for disinfection, see the relevant subclasses for these articles, e.g. H04R1/12
• CPC Class Codes: A61L 2/16 using chemical substances
• CPC Class Codes: A61P 1/02 Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
• CPC Class Codes: A61P 13/02 of urine or of the urinary tract, e.g. urine acidifiers
• CPC Class Codes: A61P 17/00 Drugs for dermatological disorders
• CPC Class Codes: A61P 27/16 Otologicals
• CPC Class Codes: A61P 31/04 Antibacterial agents
• CPC Class Codes: A61Q 17/005 Antimicrobial preparations
• CPC Class Codes: C07C 407/00 Preparation of peroxy compounds
• CPC Class Codes: C07C 409/24 the —O—O— group being bound between a >C=O group and hydrogen, i.e. peroxy acids
• CPC Class Codes: C11D 3/00 Other compounding ingredients of detergent compositions covered in group C11D1/00
• 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: C12P 7/40 containing a carboxyl group including Peroxycarboxylic acids

Abstract

The present invention relates generally to peroxyformic acid forming compositions, methods for forming peroxyformic acid, preferably in situ, using the peroxyformic acid forming compositions. The present invention also relates to the peroxyformic acid formed by the above compositions and methods. The present invention further relates to the uses of the peroxyformic acid, preferably in situ, for treating a surface or a target. The present invention further relates to methods for treating a biofilm using peroxyformic acid, including peroxyformic acid generated in situ.

Claims

1. A method for forming peroxyformic acid comprising:

contacting

(a) a solid composition that comprises a first reagent that comprises a polyhydric alcohol ester of formic acid, and a second reagent that comprises hydrogen peroxide or an inorganic peroxo compound that generates hydrogen peroxide when contacted with an aqueous liquid, with

(b) an aqueous liquid to generate a formed solution that comprises peroxyformic acid;

wherein the pH of the formed solution becomes about 8 or lower within about 1 minute after the contacting between the solid composition and the aqueous liquid.

2. The method of claim 1, wherein the polyhydric alcohol ester of formic acid is a solid or a liquid that is solidified to provide a solid ester.

3. The method of claim 1, wherein the polyhydric alcohol ester of formic acid is glycerol formate, pentaerythritol formate, mannitol formate, propylene glycol formate, sorbitol formate and/or a sugar formate, and wherein the sugar formate comprises sucrose formates, dextrin formates, maltodextrin formates, or starch formates.

4. The method of claim 1, wherein the formed solution has a pH ranging from about 2 to about 8.

5. The method of claim 4, wherein the formed solution has a pH ranging from about 4 to about 8.

6. The method of claim 1, wherein the formed solution comprises peroxyformic acid under ambient conditions and wherein said ambient conditions comprise the conditions of the surrounding environment.

7. The method of claim 1, wherein the formed solution comprises peroxyformic acid at a temperature ranging from about 4°

C. to about 60°

C.

8. The method of claim 1, wherein the solid composition is contacted with the aqueous liquid in the presence of a catalyst or an enzyme that catalyzes the formation of peroxyformic acid from the polyhydric alcohol ester of formic acid and hydrogen peroxide.

9. The method of claim 1, wherein the solid composition further comprises a catalyst or enzyme comprising a perhydrolytic enzyme, lipase, coronase, termanyl or esperease.

10. The method of claim 1, wherein the solid composition further comprises a stabilizing agent for peroxyformic acid and/or hydrogen peroxide, and/or a pH buffering agent.

11. The method of claim 10, wherein the stabilizing agent is a pyridine carboxylic acid based stabilizer or salt thereof, a phosphonate based stabilizer or salt thereof, or combinations thereof.

12. The method of claim 10, wherein the solid composition is contacted with the aqueous liquid in multiple dosages.

13. The method of claim 1, wherein the solid composition comprises from about 1 ppm to about 500,000 ppm of the polyhydric alcohol ester of formic acid and an inorganic peroxo compound that generates from about 150 ppm to about 150,000 ppm of hydrogen peroxide when contacted with the aqueous liquid.

14. The method of claim 1, wherein the solid composition comprises from about 1 ppm to about 500,000 ppm of the polyhydric alcohol ester of formic acid and an inorganic peroxo compound that generates from about 150 ppm to about 100,000 ppm of hydrogen peroxide when contacted with the aqueous liquid.

15. The method of claim 1, wherein the formed solution comprises from about 1 ppm to about 100,000 ppm of peroxyformic acid.

16. The method of claim 1, wherein the solid composition is contacted with the aqueous liquid to generate a formed solution that comprises at least about 80% of the maximum experimental concentration of peroxyformic acid within from about 1 minute to about 15 minutes of the contact time between the solid composition and the aqueous liquid.

17. The method of claim 1, further comprising the step of adding a C₂-C₂₂ percarboxylic acid to the aqueous liquid.

18. The method of claim 17, wherein the C₂-C₂₂ percarboxylic acid comprises peroxyacetic acid, peroxyoctanoic acid and/or peroxysulfonated oleic acid.