Peroxycarboxylic acid compositions suitable for inline optical or conductivity monitoring

Patent metadata

Field	Value
Publication number	US-2017248522-A1
Application number	US-201715595528-A
Country	US
Kind code	A1
Filing date	May 15, 2017
Priority date	Mar 5, 2013
Publication date	Aug 31, 2017
Grant date	—

Abstract

Peracid stable fluorescent active compounds in highly acidic, equilibrium peroxycarboxylic acid sanitizing compositions are disclosed as having improved fluorescent stability allowing for monitoring of peroxycarboxylic acid concentration by conductivity and/or optical sensors. Beneficially, the compositions are also low odor and low/no VOC dual functioning acid wash and sanitizing compositions.

First claim

1 . An equilibrium peracid composition comprising:
a C 1 -C 22 peroxycarboxylic acid; a C 1 -C 22 carboxylic acid; hydrogen peroxide; and an aryl sulfonate fluorescent active compound, wherein the fluorescent active compound is sodium xylene sulfonate, toluene sulfonate, alkyl diphenyl oxide disulfonate, naphthalene sulfonate, alkyl naphthalene sulfonate, naphthalene disulfonate or sodium cumene sulfonate; and wherein the fluorescent active compound is stable in the equilibrium peracid composition for monitoring peroxycarboxylic acid concentration by an optical sensor.

2 . The composition of claim 1 , wherein the C 1 -C 22 peroxycarboxylic acid comprises from about 1 wt-% to about 40 wt-%, the C 1 -C 22 carboxylic acid comprises from about 1 wt-% to about 80 wt-%, the hydrogen peroxide comprises from about 1 wt-% to about 80 wt-%, and the fluorescent active compound comprises from about 0.001 wt-% to about 10 wt-%.

3 . The composition of claim 1 , further comprising at least one additional agent selected from the group consisting of an acidulant, a hydrotrope, a solvent, a stabilizing agent, an anionic surfactant, a metal salt defoaming agent, and combinations thereof.

4 . The composition of claim 1 , wherein the C 1 -C 22 peroxycarboxylic acid is a C 2 -C 20 peroxycarboxylic acid and wherein the C 1 -C 22 carboxylic acid is a C 2 -C 20 carboxylic acid.

5 . The composition of claim 4 , wherein the peroxycarboxylic acid is peroxyacetic acid, peroxyoctanoic acid and/or peroxysulfonated oleic acid, and wherein the carboxylic acid is acetic acid, octanoic acid, sulfonated oleic acid or a combinations of the same.

6 . The composition of claim 1 , wherein the fluorescent active compound is sodium xylene sulfonate, toluene sulfonate or sodium cumene sulfonate.

7 . The composition of claim 1 , wherein the pH of the use solution is below about 4.

8 . The composition of claim 1 , further comprising an alkaline metal defoaming agent, an anionic surfactant, and a peroxycarboxylic acid stabilizing agent, wherein the stabilizing agent is a picolinic acid or a compound having the following Formula (IA):

wherein R 1 is OH or —NR 1a R 1b , wherein R 1a and R 1b are independently hydrogen or (C 1 -C 6 )alkyl; wherein R 2 is OH or —NR 2a R 2b , wherein R 2a and R 2b are independently hydrogen or (C 1 -C 6 )alkyl; wherein each R 3 is independently (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl or (C 2 -C 6 )alkynyl; and n is a number from zero to 3; or a salt thereof;
or a compound having the following Formula (IB):

wherein R 1 is OH or wherein R 1a and R 1b are independently hydrogen or (C 1 -C 6 )alkyl; wherein R 2 is OH or —NR 2a R 2b , wherein R 2a and R 2b are independently hydrogen or (C 1 -C 6 )alkyl; wherein each R 3 is independently (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl or (C 2 -C 6 )alkynyl; and n is a number from zero to 3; or a salt thereof, wherein the stabilizing agent delays or prevents the peroxycarboxylic acid from exceeding its self-accelerating decomposition temperature (SADT).

9 . The composition of claim 1 , wherein the C 1 -C 22 peroxycarboxylic acid comprises from about 1 wt-% to about 20 wt-%, the C 1 -C 22 carboxylic acid comprises from about 1 wt-% to about 50 wt-%, the hydrogen peroxide comprises from about 1 wt-% to about 50 wt-%, and the fluorescent active compound comprises from about 0.1 wt-% to about 10 wt-%.

10 . The composition of claim 1 , wherein the fluorescent active compound comprises from about 0.5 wt-% to about 7.5 wt-%.

11 . An equilibrium peracid composition comprising:
a C 1 -C 22 peroxycarboxylic acid; a C 1 -C 22 carboxylic acid; hydrogen peroxide; an aryl sulfonate fluorescent active compound, wherein the fluorescent active compound is sodium xylene sulfonate, toluene sulfonate, alkyl diphenyl oxide disulfonate, naphthalene sulfonate, alkyl naphthalene sulfonate, naphthalene disulfonate or sodium cumene sulfonate; and wherein the fluorescent active compound is stable in the equilibrium peracid composition for monitoring peroxycarboxylic acid concentration by an optical sensor; a mineral acid; and a surfactant.

12 . The composition of claim 11 , wherein the C 1 -C 22 peroxycarboxylic acid comprises from about 1 wt-% to about 40 wt-%, the C 1 -C 22 carboxylic acid comprises from about 1 wt-% to about 80 wt-%, the hydrogen peroxide comprises from about 1 wt-% to about 80 wt-%, the fluorescent active compound comprises from about 0.001 wt-% to about 10 wt-%, the mineral acid comprises from about 0.1 wt-% to about 20 wt-%, and the surfactant comprises from about 0.1 wt-% to about 25 wt-%.

13 . The composition of claim 11 , further comprising at least one additional agent selected from the group consisting of an acidulant, a hydrotrope, a solvent, a stabilizing agent, an anionic surfactant, a metal salt defoaming agent, and combinations thereof.

14 . The composition of claim 11 , wherein the mineral acid is sulfuric acid, hydrogen sulfate, nitric acid, sulfamic acid and sulfonic acid both alkyl and aryl, or phosphonic acid.

15 . The composition of claim 11 , wherein the surfactant is a nonionic surfactant, anionic surfactant, and combinations thereof.

16 . The composition of claim 15 , wherein the surfactant is a low-foaming anionic surfactant.

17 . The composition of claim 4 , wherein the peroxycarboxylic acid is peroxyacetic acid, peroxyoctanoic acid and/or peroxysulfonated oleic acid, and wherein the carboxylic acid is acetic acid, octanoic acid, sulfonated oleic acid or combinations of the same.

18 . The composition of claim 11 , wherein the fluorescent active compound is sodium xylene sulfonate or sodium cumene sulfonate.

19 . The composition of claim 11 , wherein the pH of the use solution is below about 4.

20 . The composition of claim 11 , further comprising an alkaline metal defoaming agent, an anionic surfactant, and a peroxycarboxylic acid stabilizing agent, wherein the stabilizing agent is a picolinic acid or a compound having the following Formula (IA):

wherein R 1 is OH or —NR 1a R 1b , wherein R 1a and R 1b are independently hydrogen or (C 1 -C 6 )alkyl; wherein R 2 is OH or —NR 2a R 2b , wherein R 2a and R 2b are independently hydrogen or (C 1 -C 6 )alkyl; wherein each R 3 is independently (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl or (C 2 -C 6 )alkynyl; and n is a number from zero to 3; or a salt thereof;
or a compound having the following Formula (IB):

wherein R 1 is OH or —NR 1a R 1b , wherein R 1a and R 1b are independently hydrogen or (C 1 -C 6 )alkyl; wherein R 2 is OH or —NR 2a R 2b , wherein R 2a and R 2b are independently hydrogen or (C 1 -C 6 )alkyl; wherein each R 3 is independently (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl or (C 2 -C 6 )alkynyl; and n is a number from zero to 3; or a salt thereof, wherein the stabilizing agent delays or prevents the peroxycarboxylic acid from exceeding its self-accelerating decomposition temperature (SADT).

Assignees

• Ecolab Usa Inc

Inventors

• Li Junzhong
• Mcsherry David D
• Brewster Allison
• Staub Richard

Classifications

• A01N59/02

  Sulfur; Selenium; Tellurium; Compounds thereof · CPC title

• A01N25/16

  Foams · CPC title

• A01N37/16

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

• A01N37/02

  Saturated carboxylic acids or thio analogues thereof; Derivatives thereof · CPC title

• G01N21/01

  Arrangements or apparatus for facilitating the optical investigation · CPC title