GENERATION OF PEROXYFORMIC ACID THROUGH POLYHYDRIC ALCOHOL FORMATE

• US 20180242578A1
• Filed: 04/30/2018
• Published: 08/30/2018
• 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
• Granted Patent: US 10,542,751 B2
• Time in Patent Office: Days
• 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

1-192. -192:

(canceled)

193. :

A method for forming peroxyformic acid comprising;

contacting a first reagent that comprises an ester of a polyhydric alcohol and formic acid, and a

second reagent that comprises hydrogen peroxide or a substance that generates hydrogen peroxide to form peroxyformic acid,

wherein the formed peroxyformic acid comprises at least about 1 ppm peroxyformic acid within about 1 minute, and

wherein the pH of said formed peroxyformic acid becomes about 8 or lower within about 1 minute after the contact between said first reagent and said second reagent.

194. :

The method of claim 193, wherein the ester of a polyhydric alcohol and formic acid comprises glycerol formates, ethylene glycol formates, pentaerythritol formates, mannitol formates, propylene glycol formates, sorbitol formates and sugar formates, and wherein the sugar formates are sucrose formates, dextrin formates, maltodextrin formates, or starch formates.

195. :

The method of claim 193, wherein the first reagent and the second reagent are contacted with each other to form a solution of peroxyformic acid that has a pH ranging from about 2 to about 8.

196. :

The method of claim 193, wherein said first reagent and said second reagent are kept separately prior to said contacting and wherein the reaction optionally includes a catalyst or an enzyme that catalyzes formation of peroxyformic acid from the ester of a polyhydric alcohol and formic acid, and hydrogen peroxide.

197. :

The method of claim 193, wherein the first reagent and the second reagent are contacted to form a solution of peroxyformic acid that comprises at least about 1 ppm peroxyformic acid within about 30 seconds or less.

198. :

The method of claim 193, wherein the first reagent and the second reagent are contacted to form a solution of peroxyformic acid that comprises at least about 1 ppm peroxyformic acid within about 15 seconds or less.

199. :

The method of claim 193, wherein the first reagent and the second reagent are contacted to form a solution of peroxyformic acid that comprises at least about 100 ppm peroxyformic acid within about 5 minutes or less.

200. :

The method of claim 193, wherein the first reagent and the second reagent are contacted to form a solution of peroxyformic acid that comprises at least about 500 ppm peroxyformic acid within about 5 minutes or less.

201. :

The method claim 193, wherein the first reagent and the second reagent are contacted to form a solution of peroxyformic acid that comprises peroxyformic acid under temperatures from about 0°

C. to about 60°

C.

202. :

The method of claim 193, which further comprises using a stabilizing agent for peroxyformic acid, a stabilizing agent for hydrogen peroxide, and/or a pH buffering agent.

203. :

The method of claim 202, wherein (i) the first reagent comprises the stabilizing agent for peroxyformic acid and/or a pH buffering agent, (ii) the second reagent comprises the stabilizing agent for hydrogen peroxide, and/or (iii) a third reagent comprises the stabilizing agent for peroxyformic acid, the stabilizing agent for hydrogen peroxide, and/or a pH buffering agent.

204. :

The method of claim 193, which is used to form a solution that comprises from about 0.1 ppm to about 100,000 ppm of peroxyformic acid.

205. :

The method of claim 193, which is used to form a solution that comprises from about 100 ppm to about 1,000 ppm of peroxyformic acid.

206. :

The method of claim 193, which further comprises forming a C₂-C₂₂ percarboxylic acid in the liquid comprising peroxyformic acid.

207. :

The method of claim 206, wherein the second reagent is an equilibrium C₂-C₂₂ percarboxylic acid composition providing the hydrogen peroxide.

208. :

A method for forming peroxyformic acid comprising;

contacting a first reagent that comprises an ester of a polyhydric alcohol and formic acid, and a

second reagent that comprises hydrogen peroxide or that comprises a substance that generates hydrogen peroxide when in contact with a liquid, to form a liquid that comprises from about 0.1 ppm to about 100,000 ppm of peroxyformic acid and wherein the pH of said formed liquid becomes about 8 or lower within about 1 minute after the contact between said first reagent and said second reagent; and

wherein the first reagent and the second reagent are contacted to form a solution that comprises

at least about 1 ppm peroxyformic acid within about 1 minute of the contact time.

209. :

The method of claim 208, wherein the first reagent and the second reagent are kept separately prior to said contacting.

210. :

The method of claim 208, wherein the first reagent and the second reagent are contacted with each other to form a solution that has a pH ranging from about 4 to about 8.

211. :

The method of claim 208, wherein the first reagent and the second reagent are contacted to form a solution that comprises at least about 1 ppm peroxyformic acid within about 30 seconds or less.

212. :

The method of claim 208, wherein the first reagent and the second reagent are contacted to form a solution that comprises at least about 1 ppm peroxyformic acid within about 15 seconds or less.