WO2000050554B1 - Color stable hypochlorous sanitizer and methods - Google Patents

Color stable hypochlorous sanitizer and methods

Info

Publication number
WO2000050554B1
WO2000050554B1 PCT/US2000/004595 US0004595W WO0050554B1 WO 2000050554 B1 WO2000050554 B1 WO 2000050554B1 US 0004595 W US0004595 W US 0004595W WO 0050554 B1 WO0050554 B1 WO 0050554B1
Authority
WO
WIPO (PCT)
Prior art keywords
dye
comprises
source
solution
composition
Prior art date
Application number
PCT/US2000/004595
Other languages
French (fr)
Other versions
WO2000050554A1 (en
Inventor
Eddie D Sowle
Darryl C Bowling
Original Assignee
Kay Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US25708699A priority Critical
Priority to US09/257,086 priority
Priority to US09/501,876 priority
Priority to US09/501,876 priority patent/US20030059483A1/en
Application filed by Kay Chemical Co filed Critical Kay Chemical Co
Publication of WO2000050554A1 publication Critical patent/WO2000050554A1/en
Publication of WO2000050554B1 publication Critical patent/WO2000050554B1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials characterised by their shape or physical properties
    • C11D17/0047Detergents in the form of bars or tablets
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/395Bleaching agents
    • C11D3/3955Organic bleaching agents
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/395Bleaching agents
    • C11D3/3956Liquid compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/40Dyes ; Pigments
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/48Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02Inorganic compounds
    • C11D7/04Water-soluble compounds
    • C11D7/08Acids
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22Organic compounds
    • C11D7/26Organic compounds containing oxygen
    • C11D7/265Carboxylic acids; Salts thereof

Abstract

Manual warewashing in common food service locations is typically performed in a multicompartment sink. In one basin the ware is contacted with an aqueous detergent. The cleaned ware is rinsed in a subsequent sink and is then sanitized in a sanitizing solution in a third sink. Hypochlorite bleaches, if adjusted to an appropriate pH, can maintain substantial sanitizing capacity while not decolorizing otherwise oxidatively sensitive dyes. In the method of the invention, the sanitizing solution adjusted to a pH of less than about 7 containing a dye can maintain a stable dye solution for a period of time greater than the time required to deplete 90 % or more of the OC in solution. An indication of the existence of active sanitizer in the sanitizer step based on the presence of color in the aqueous solution is thus obtained.

Claims

AMENDED CLAIMS[received by the International Bureau on 6 September 2000 (06.09.00); original claims 5, 8 and 9 amended; remaining claims unchanged (8 pages)]
1. An active chlorine containing solid unit containing a chlorine source and an stable source of dye, the solid unit comprising:
(a) about 10 to about 200 parts by weight of a solid active source of chlorine per each part of dye; and
(b) a source of a dye, the dye comprising a particulate dye having a minimum particle size of about 200 microns, wherein the solid unit comprises a major dimension greater than about 2 millimeters and a weight greater than about 2 grams, the solid unit substantially free of an amount of free water sufficient to act as a reaction medium between the solid chlorine source and the dye.
2. The solid unit of claim 1 wherein the dye comprises a dye with a minimum particle size of about 500 microns and a density less than 0.9 gram-cm'3.
3. The solid unit of claim 1 wherein the solid unit comprises a cylindrical tablet having a diameter of about 4 to 75 millimeters and a thickness of about 1 to 25 millimeters.
4. The solid unit of claim 1 wherein the solid chlorine source comprises an alkali metal dichloroisocyanurate dihydrate.
5. The solid unit of claim 1 wherein the solid unit comprises a spheroid having a major dimension of about 5 to 60 millimeters and a dimension perpendicular to said major dimension of about 1 to 50 millimeters.
6. The solid unit of claim 4 wherein the solid chlorine source comprises an encapsulated alkali metal dichloroisocyanurate dihydrate.
7. The solid unit of claim 1 wherein the dye comprises a granular dye having a particle size greater than about 600 microns and a density less than about
0.85 grams-cm"3.
8. A method of using the solid unit of claim 1 in a cleaning or sanitizing operation, the method comprises:
(a) placing the solid unit in a volume of an aqueous liquid in a container, the weight ratio of the solid to the aqueous solution being about 0.1 to 20 grams per liter of water to form a dye colored, active- chlorine solution; and
(b) contacting ware with the aqueous active-chlorine solution during cleaning or sanitizing operations for a period of up to 4 hours and after detecting a color change, either replacing the aqueous solution or replenishing the aqueous solution with additional chlorine source.
9. A particulate composition forming an aqueous solution having an active chlorine source and a dye, the powdered concentrate comprising: (a) about 1 to 90 wt% of an encapsulated source of halogen; and
(b) an effective amount of dye; wherein the concentrate has substantially no free water, has an extended shelf life of greater than one month and when added to an aqueous diluent provides a dye that indicates the presence of an active halogen concentration for a predetermined time.
10. The composition of claim 9 wherein the source of halogen comprises a source of chlorine.
11. The composition of claim 10 wherein the source of chlorine comprises chloroisocyanurate compound.
12. The composition of claim 9 which also comprises an acid source to obtain a pH less than 7 in the aqueous solution.
13. The composition of claim 9 wherein the indicator comprises FD&C dye No. 40.
14. The composition of claim 9 wherein the indicator comprises FD&C dye No. 3.
15. The composition of claim 12 wherein the acid source comprises a solid acid.
16. The composition of claim 9 wherein the acid salt comprises sodium dihydrogen phosphate, sodium hydrogen tartrate, sodium hydrogen sulfate, or mixtures thereof.
17. The composition of claim 9 wherein the builder salt comprises sodium sulfate, sodium carbonate, trisodium phosphate, sodium bicarbonate or mixtures thereof.
18. The composition of claim 9 wherein the concentration of dye in the concentrate is adjusted such that the dye color changes or is depleted during a useful predetermined period of time during which the sanitizer solution can be used for its intended purpose and maintain at least 50 ppm active chlorine.
19. An aqueous liquid cleaning or sanitizing composition containing a dye that indicates chlorine concentration, the liquid comprising a major proportion of an aqueous diluent, and (a) a source of acid;
(b) an effective amount of a dye to obtain a colored solution for a predetermined period of time; (c) an effective cleaning or sanitizing amount of a halogen bleach; wherein the aqueous solution has a pH less than 7 and the dye color is depleted or changed before the concentration of halogen is depleted to less than 50 ppm from the solution.
20. The concentrate of claim 19 wherein the source of halogen comprises a source of chlorine.
21. The composition of claim 20 wherein the source of chlorine comprises a chloroisocyanurate compound.
22. The composition of claim 19 which also comprises a builder salt.
23. The composition of claim 19 wherein the indicator comprises
FD&C dye No. 40.
24. The composition of claim 21 wherein the chlorine source comprises an encapsulated alkali metal dichloroisocyanurate dihydrate.
25. The composition of claim 19 wherein the acid source comprises a solid acid.
26. The composition of claim 19 wherein the acid salt comprises sodium dihydrogen phosphate, sodium hydrogen tartrate, sodium hydrogen sulfate, or mixtures thereof.
27. The composition of claim 19 wherein the builder salt comprises sodium sulfate, sodium carbonate, trisodium phosphate, sodium bicarbonate or mixtures thereof.
28. The composition of claim 19 wherein the concentration of dye in the concentrate is adjusted such that the dye color changes or is depleted during a useful period of time during which the sanitizer solution can be used for its intended purpose.
29. A method of cleaning or sanitizing hard surfaces comprising: (a) contacting the hard surface with an aqueous solution comprising the composition of claim 9, forming a surface having the aqueous liquid comprising a halogen source; and
(b) removing the aqueous liquid halogen source.
30. A method of hand washing ware in a sink having two or more basins, using a stable dye in an aqueous oxidative chlorine based cleaner or sanitizer composition, . the method comprising:
(a) contacting ware with an aqueous detergent in a first basin to remove soil, producing cleaned ware; and (b) contacting the cleaned ware in a subsequent basin with an aqueous sanitizer solution comprising an effective amount of a chlorine source, the sanitizer solution additionally comprising a dye that is sufficiently stable in the aqueous solution to maintain at least some detectable color in the sanitizing solution after greater than 90% of the oxidizing species have been consumed.
31. The method of claim 30 wherein the chlorine source comprises an alkali metal hypochlorite.
32. The method of claim 31 wherein the hypochlorite sanitizer comprises sodium hypochlorite.
33. The method of claim 30 wherein the chlorine source comprises a chlorinated isocyanurate compound which generates hypochlorous acid at the pH.
34. The method of claim 30 wherein the cleaned ware is contacted with a potable water rinse to form a rinsed cleaned ware prior to contacting the rinsed cleaned ware with the sanitizing solution.
35. The method of claim 30 wherein the aqueous sanitizer solution has a pH of less than about 7, the pH selected such that the concentration of OCr1 is minimized and the concentration of HOCI is maximized.
36. The method of claim 34 wherein the cleaned ware is contacted with the aqueous rinse for approximately 1 to about 30 seconds and the rinsed cleaned ware is contacted with the aqueous sanitizing solution for about 1 to 30 seconds.
37. The method of claim 30 wherein the ware is contacted with mechanical action in the first basin with the aqueous detergent for sufficient amount of time to substantially remove food soil and the cleaned ware is contacted with the aqueous sanitizer solution for about 1 to about 30 seconds.
38. The method of claim 30 wherein the concentration of the chlorine source is about 1 to 100 parts per million in the solution.
39. The method of claim 30 wherein the indicator comprises FD&C Dye #40.
40. The method of claim 30 wherein the indicator comprises FD&C Dye #3.
41. The method of claim 30 wherein after the sanitizing step, the ware is permitted to dry without contact with mechanical action or an aqueous solution.
42. The method of claim 30 wherein the sanitizing solution is made by diluting a powdered solid comprising:
(a) about 1 to 90 wt% of an encapsulated chlorine source;
(b) about 0.01 to 1.0 wt% of a dye; (c) about 0.5 to 20 wt% of an acid source; and
(d) a major portion of a builder salt.
43. The method of claim 42 wherein the encapsulated chlorine source comprises an encapsulated chloroisocyanurate compound.
44. The method of claim 42 wherein the encapsulated chlorine source comprises a particle of the chlorine source, a first inorganic layer and a second organic layer.
45. The method of claim 42 wherein the dye comprises FD&C dye
No. 40.
46. The method of claim 42 wherein the acid salt comprises potassium dihydrogen phosphate, sodium hydrogen tartrate or mixtures thereof.
47. The method of claim 42 wherein the builder salt comprises sodium sulfate.
48. The method of claim 42 wherein the pH of the aqueous sanitizing solution is adjusted to a pH less than 7 and to a pH at which greater than about 80% of the oxidative species is in the form of HOCI and less than about 20% of the oxidative species is in the form of OCI"1.
49. The method of claim 42 wherein the dye color is maintained in the aqueous sanitizing solution for a period of time of about 3 to 6 hours.
50. A sanitizing solution useful in sanitizing a surface, the solution comprising:
(a) a major proportion of an aqueous medium having a pH less than 7; (b) about 1 to 90 wt% of a source of an encapsulated active chlorine source resulting in at least 100 ppm active chlorine;
(c) an effective amount of a dye; and
(d) a solid diluent or extender salt.
51. The composition of claim 50 wherein the composition additionally comprises an acid salt selected from the group consisting of sodium acid phosphate, sodium acid tartrate or mixtures thereof.
PCT/US2000/004595 1999-02-24 2000-02-23 Color stable hypochlorous sanitizer and methods WO2000050554A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US25708699A true 1999-02-24 1999-02-24
US09/257,086 1999-02-24
US09/501,876 2000-02-10
US09/501,876 US20030059483A1 (en) 1999-02-24 2000-02-10 Color stable hypochlorous sanitizer and methods

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
AU37051/00A AU763904B2 (en) 1999-02-24 2000-02-23 Color stable hypochlorous sanitizer and methods
JP2000601118A JP2002537405A (en) 1999-02-24 2000-02-23 Stable hypochlorite disinfectants color and methods
DE2000627550 DE60027550T2 (en) 1999-02-24 2000-02-23 Color-stabilized hypochlorant detoxification and detention process
MXPA01008617A MXPA01008617A (en) 1999-02-24 2000-02-23 Color stable hypochlorous sanitizer and methods.
EP20000915847 EP1155109B1 (en) 1999-02-24 2000-02-23 Color stable hypochlorous sanitizer and methods
CA 2363741 CA2363741A1 (en) 1999-02-24 2000-02-23 Color stable hypochlorous sanitizer and methods
BR0008287A BR0008287A (en) 1999-02-24 2000-02-23 color stable hypochlorous Disinfectant and Methods

Publications (2)

Publication Number Publication Date
WO2000050554A1 WO2000050554A1 (en) 2000-08-31
WO2000050554B1 true WO2000050554B1 (en) 2001-01-18

Family

ID=26945792

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/004595 WO2000050554A1 (en) 1999-02-24 2000-02-23 Color stable hypochlorous sanitizer and methods

Country Status (9)

Country Link
EP (1) EP1155109B1 (en)
JP (1) JP2002537405A (en)
CN (1) CN1230510C (en)
AU (1) AU763904B2 (en)
BR (1) BR0008287A (en)
CA (1) CA2363741A1 (en)
DE (1) DE60027550T2 (en)
MX (1) MXPA01008617A (en)
WO (1) WO2000050554A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2835702A1 (en) * 2002-02-12 2003-08-15 Dominique Mercier Disinfectant composition useful in the disinfection of water comprises a mixture of sodium hypochlorite and sodium monophosphate
US7875359B2 (en) 2005-01-13 2011-01-25 Akzo Nobel N.V. Opacifying polymers
US8048837B2 (en) 2005-01-13 2011-11-01 The Clorox Company Stable bleaches with coloring agents
US8642527B2 (en) 2007-06-18 2014-02-04 The Clorox Company Oxidizing bleach composition
GB2488838A (en) * 2011-03-11 2012-09-12 Biomimetics Health Ind Ltd A stable antimicrobial aqueous hypochlorous acid solution
CN103388257A (en) * 2013-08-05 2013-11-13 天津成育庭科技有限公司 Washing method of light-color seriously-blotted public textile

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE630391A (en) * 1962-04-06
GB1049051A (en) * 1964-01-17 1966-11-23 Jeyes Group Ltd Improvements in and relating to cleaning preparations
DK536585A (en) * 1985-04-30 1986-10-31 Economics Lab Encapsulated halogenated bleaching agents and procedure for fremstillingog application
AU2627388A (en) * 1987-11-28 1989-07-05 Fibre Treatments (Holdings) Limited A wiping product
US5089162A (en) * 1989-05-08 1992-02-18 Lever Brothers Company, Division Of Conopco, Inc. Cleaning compositions with bleach-stable colorant
US5358653A (en) * 1990-06-25 1994-10-25 Ecolab, Inc. Chlorinated solid rinse aid
GB9712680D0 (en) * 1997-06-18 1997-08-20 Reckitt & Colmann Prod Ltd Improvements in or relating to disinfecting materials
AU3907697A (en) * 1997-08-05 1999-03-01 Procter & Gamble Company, The Decolorizing compositions
BR9910145A (en) * 1998-02-04 2001-11-20 Unilever Nv lavatory cleaning block, and using salpicoscoloridos within a cleansing block delavatório

Also Published As

Publication number Publication date
CN1341145A (en) 2002-03-20
AU763904B2 (en) 2003-08-07
DE60027550D1 (en) 2006-06-01
EP1155109B1 (en) 2006-04-26
EP1155109A1 (en) 2001-11-21
DE60027550T2 (en) 2007-04-26
MXPA01008617A (en) 2002-07-30
AU3705100A (en) 2000-09-14
CN1230510C (en) 2005-12-07
BR0008287A (en) 2001-11-06
JP2002537405A (en) 2002-11-05
CA2363741A1 (en) 2000-08-31
WO2000050554A1 (en) 2000-08-31

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