Peracid compositions with conductivity monitoring capability

Patent metadata

Field	Value
Publication number	US-12558713-B2
Application number	US-202117452100-A
Country	US
Kind code	B2
Filing date	Oct 25, 2021
Priority date	May 31, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

Peroxycarboxylic acid compositions comprising compatible ionic compounds to deliver conductivity signals to enable monitoring of the peroxycarboxylic acid concentration by conductivity when diluted for use are disclosed. Methods of measuring peroxycarboxylic acid concentration by conductivity are also disclosed. Beneficially, conductivity measurement allows a user to determine concentration of the peroxycarboxylic acid at a point of use without cumbersome titration steps to determine the concentration providing various benefits at an application of use.

First claim

What is claimed is:

1 . A peroxycarboxylic acid forming composition with conductivity monitoring capability consisting of:
a C1-C22 carboxylic acid; a hydrogen peroxide source; water; an ionic compound which is a peroxycarboxylic acid compatible magnesium salt or aluminum salt; a stabilizing agent; and optionally one or more additional functional ingredients selected from the group consisting of:
optical brighteners, defoaming agents, anti-redeposition agents, bleaching agents, solubility modifiers, dispersants, metal protecting agents, soil antideposition agents, corrosion inhibitors, builders, sequestrants, chelating agents, enzymes, fragrances, dyes, hydrotropes couplers, buffers, and solvents;
wherein a C1-C22 peroxycarboxylic acid is formed, and wherein the weight ratio of the ionic compound to the peroxycarboxylic acid is between about 5:1 to 1:5 to ensure a detectable conductivity signal.

2 . The composition of claim 1 , wherein the carboxylic acid is acetic acid, and the composition meets the requirement of organic certification.

3 . The composition of claim 1 , wherein the ionic compound is magnesium sulfate.

4 . The composition of claim 1 , wherein the C1-C22 carboxylic acid is present in an amount between about 10-50 wt-%, the hydrogen peroxide source is present in an amount between about 10-70 wt-%, the water is present in an amount from between about 0.1-20 wt-%, the ionic compound is present in an amount from between about 5-50 wt-%, and the stabilizing agent is present in an amount from between about 0-5 wt-%.

5 . A peroxycarboxylic acid composition with conductivity monitoring capability consisting of:
from about 5-20 wt-% of peroxyacetic acid; from about 15-40 wt-% of acetic acid; from about 5-50 wt-% of hydrogen peroxide; water; from about 5-50 wt-% of an ionic compound which is a peroxycarboxylic acid compatible magnesium salt or aluminum salt; from about 0.001-5 wt-% of a stabilizing agent; and optionally one or more additional functional ingredients selected from the group consisting of:
optical brighteners, defoaming agents, anti-redeposition agents, bleaching agents, solubility modifiers, dispersants, metal protecting agents, soil antideposition agents, corrosion inhibitors, builders, sequestrants, chelating agents, enzymes, fragrances, dyes, hydrotropes, couplers, buffers, and solvents.

6 . A use solution of peroxycarboxylic acid composition with conductivity monitoring capability consisting of:
a diluted composition formed from adding water to a concentrate composition, wherein the concentrate composition consists of: from about 5-20 wt-% of a C 1 -22 peroxycarboxylic acid; from about 10-50 wt-% of a C1-C22 carboxylic acid; from about 5-70 wt-% of hydrogen peroxide; from about 5-50 wt-% of an ionic compound which is a peroxycarboxylic acid compatible magnesium salt or aluminum salt; from about 0-5 wt-% of a stabilizing agent; and optionally one or more additional functional ingredients selected from the group consisting of:
optical brighteners, defoaming agents, anti-redeposition agents, bleaching agents, solubility modifiers, dispersants, metal protecting agents, soil antideposition agents, corrosion inhibitors, builders, sequestrants, chelating agents, enzymes, fragrances, dyes, hydrotropes, couplers, buffers, and solvents.

7 . The composition of claim 6 , wherein the ionic compound is magnesium sulfate.

8 . The composition of claim 6 , wherein weight ratio of the ionic compound to the peroxycarboxylic acid is between about 5:1 to about 1:5 to ensure sufficient conductivity readings.

9 . The composition of claim 6 , wherein the C1-C22 carboxylic acid is acetic acid and the C1-C22 peroxycarboxylic acid is peroxyacetic acid.

10 . The composition of claim 6 , wherein the weight ratio of the stabilizing agent to the ionic compound is between about 1:8 to about 1:15.

11 . The composition of claim 6 , wherein the use solution pH is between about 2 and about 9.

12 . The composition of claim 6 , wherein the use solution pH is between about 2 and about 5.

13 . The composition of claim 6 , wherein the composition is phosphorus free.

14 . The composition of claim 6 , wherein the stabilizing agent is dipicolinic acid and/or phosphonic acid.

15 . The composition of claim 6 , wherein the composition meets the requirement of organic certification.

16 . The composition of claim 6 , wherein the concentrate composition consists of:
from about 5-20 wt-% of a C1-C22 peroxycarboxylic acid; from about 15-40 wt-% of a C1-C22 carboxylic acid; from about 5-50 wt-% of hydrogen peroxide; from about 5-50 wt-% of an ionic compound which is a peroxycarboxylic acid compatible magnesium salt or aluminum salt; and from about 0.001-5 wt-% of a stabilizing agent.

Assignees

• Ecolab Usa Inc

Inventors

• Li Junzhong
• Power Caleb
• Prideaux Allison
• Staub Richard K
• Sivaswamy Vaideeswaran
• Koehl John Paul

Classifications

• C11D3/046

  Salts · CPC title

• C11D3/042

  Acids · CPC title

• C11D3/2082

  Polycarboxylic acids-salts thereof · CPC title

• C11D3/2079

  Monocarboxylic acids-salts thereof · CPC title

• C11D3/3902

  combined with specific additives · CPC title