Method for making a peroxycarboxylic acid

Patent metadata

Field	Value
Publication number	US-9288982-B2
Application number	US-201414587034-A
Country	US
Kind code	B2
Filing date	Dec 31, 2014
Priority date	Oct 18, 2006
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

The present invention relates to apparatus and methods for making a peroxycarboxylic acid. The apparatus includes a reaction catalyst and a guard column for pretreating one or more reagents, which can increase the life, activity, and/or safety of the reaction catalyst. The peroxycarboxylic acid compositions made by the method and apparatus can include one or more peroxycarboxylic acids.

First claim

We claim:

1. A method for reducing population of a microbe on an object, comprising:
delivering a liquid composition of carboxylic acid and delivering a liquid composition of an oxidizing agent to a site at which a peroxycarboxylic acid composition will be made and used wherein the liquid compositions are substantially free of a chelating agent;
pretreating the liquid compositions with at least one pretreatment column to remove metal before mixing the liquid composition of carboxylic acid and the liquid composition of an oxidizing agent to form a mixed composition, wherein the pretreatment column is substantially free of chelating agent;
reacting the pretreated liquid compositions in the presence of a reaction catalyst that can be physically removed from reaction mixture to produce the peroxycarboxylic acid composition;
recovering the peroxycarboxylic acid composition, wherein the peroxycarboxylic acid composition is substantially free of chelating agent; and
applying the peroxycarboxylic acid composition to an object to reduce the population of microbe on the object.

2. The method of claim 1 further comprising delivering a plurality of carboxylic acids to the site.

3. The method of claim 1 further comprising requesting delivery of the peroxycarboxylic acid composition from the site after the recovering of the peroxycarboxylic acid composition.

4. The method of claim 1 further comprising applying the peroxycarboxylic acid composition to aseptic packaging containers.

5. The method of claim 1 wherein the liquid composition of carboxylic acid is pretreated with a first pretreatment column and the liquid composition of oxidizing agent is pretreated with a second pretreatment column.

6. The method of claim 1 wherein a single pretreatment column is used to pretreat the liquid compositions.

7. A method for reducing population of a microbe on an object, comprising:
delivering a liquid composition of carboxylic acid and delivering a liquid composition of an oxidizing agent to a site at which a peroxycarboxylic acid composition will be made and used wherein the liquid compositions are substantially free of a chelating agent;
measuring temperature, pressure, metal content, or a combination thereof of the carboxylic acid and oxidizing agent composition in, at, or before entry to the pretreatment column;
mixing the liquid composition of carboxylic acid and the liquid composition of oxidizing agent to form a mixed composition;
pretreating the mixed composition with a pretreatment column to remove metal to form a pretreated mixed composition, wherein the pretreatment column is substantially free of chelating agent;
reacting the pretreated mixed compositions in the presence of a reaction catalyst that can be physically removed from reaction mixture to produce the peroxycarboxylic acid composition;
recovering the peroxycarboxylic acid composition, wherein the peroxycarboxylic acid composition is substantially free of chelating agent; and
applying the peroxycarboxylic acid composition to an object to reduce the population of microbe on the object.

8. The method of claim 7 further comprising actuating a pressure release valve, stopping flow of one or more reagents, causing water to flow into the apparatus, causing carboxylic acid composition of into the apparatus, shutting down the method, or a combination thereof if the temperature, difference in temperatures, pressure, difference in pressure, metal content, or difference in metal content exceeds a predetermined value.

9. The method of claim 7 further comprising shutting down the method if the temperature, difference in temperatures, pressure, difference in pressure, metal content, or difference in metal content exceeds a predetermined value.

Assignees

• Ecolab Usa Inc
• Ecolab Usa Inc

Inventors

• Mcsherry David D
• Staub Richard
• Tallman Dan N
• Li Junzhong
• Lokkesmoe Keith D

Classifications

• C07C407/00 Primary

  Preparation of peroxy compounds · CPC title

• A01N37/16 Primary

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

• C07C409/24

  the —O—O— group being bound between a >C=O group and hydrogen, i.e. peroxy acids · CPC title

• C07C409/26

  Peracetic acid · CPC title