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CA2502423A1 - Acidic cleaning method for machine dishwashing - Google Patents

Acidic cleaning method for machine dishwashing Download PDF

Info

Publication number
CA2502423A1
CA2502423A1 CA002502423A CA2502423A CA2502423A1 CA 2502423 A1 CA2502423 A1 CA 2502423A1 CA 002502423 A CA002502423 A CA 002502423A CA 2502423 A CA2502423 A CA 2502423A CA 2502423 A1 CA2502423 A1 CA 2502423A1
Authority
CA
Canada
Prior art keywords
acid
cleaning solution
tableware
aqueous cleaning
acidic aqueous
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002502423A
Other languages
French (fr)
Other versions
CA2502423C (en
Inventor
Werner Strothoff
Heiko Faubel
Helmut Maier
Winfried Troll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ecolab Inc
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32336137&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2502423(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2502423A1 publication Critical patent/CA2502423A1/en
Application granted granted Critical
Publication of CA2502423C publication Critical patent/CA2502423C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C11D7/00Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02Inorganic compounds
    • C11D7/04Water-soluble compounds
    • C11D7/06Hydroxides
    • 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 or salts thereof
    • 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
    • C11D7/34Organic compounds containing sulfur
    • 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
    • C11D2111/00Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10Objects to be cleaned
    • C11D2111/14Hard surfaces
    • 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
    • C11D2111/00Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/40Specific cleaning or washing processes
    • C11D2111/44Multi-step processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Detergent Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The process of continuous machine dishwashing, which can be carried out in single-tank or multi-tank machines, is improved by the machine-operated process disclosed. This is achieved, in particular, by treatment of the tableware at least in one process step with an acidic cleaning solution and in another process step with an alkaline cleaning solution, comprising the steps of: a) applying an acidic aqueous cleaning solution to the at least partly soiled tableware and b) removing the acidic aqueous solution and the soil in one or more following steps, the at least one alkaline treatment taking place before and/or after the acidic treatment and the alkaline and at least acidic aqueous cleaning solution at least partially neutralizing one another.

Claims (19)

1. A process for continuous or discontinuous machine dishwashing, in which the tableware is treated at least in one process step with an acidic cleaning solution and, in another process step, with an alkaline cleaning solution, comprising the steps of a) applying an acidic aqueous cleaning solution before the final rinse cycle or the final rinse zone to the at least partly soiled tableware and b) removing the acidic aqueous cleaning solution and the soil in one or more following steps, the at least one alkaline treatment taking place before and/or after the acidic treatment and the alkaline and at least one acidic aqueous cleaning solution at least partially neutralizing one another.
2. A process as claimed in claim 1, characterized in that the acidic aqueous cleaning solution contains one or more acids selected from the mineral and/or organic acids.
3. A process as claimed in claim 2, characterized in that at least one acid is present which is selected from sulfuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, propanoic acid, glycolic acid, citric acid, maleic acid, lactic acid, gluconic acid, alkane sulfonic acid, amidosulfonic acid, succinic acid, glutaric acid, adipic acid, oxalic acid, benzoic acid, phosphonic acids, polyacrylic acids or mixtures thereof.
4. A process as claimed in claim 3, characterized in that at least one acid is present which is selected from formic acid, glycolic acid, gluconic acid, amidosulfonic acid or the alkanesulfonic acids, more particularly methanesulfonic acid or mixtures thereof.
5. A process as claimed in one or more of claims 1 to 4, characterized in that the acidic aqueous cleaning solution contains between 0.01 and 10% by weight of one or more detersive substances, based on the cleaning solution.
6. A process as claimed in claim 5, characterized in that the acidic aqueous cleaning solution contains less than 0.9% by weight, preferably less than 0.8% by weight and more preferably less than 0.5% by weight of one or more detersive substances, based on the cleaning solution.
7. A process as claimed in one or more of claims 1 to 6, characterized in that the acidic aqueous cleaning solution is allowed to act on to the tableware and the soil for a certain contact time (during which spraying stops), the contact time of this aqueous cleaning solution with the tableware preferably being 2 to 100 seconds, more preferably 5 to 100 seconds and most preferably 8 to 25 seconds.
8. A process as claimed in claim 7, characterized in that the tableware is not intentionally sprayed during the contact time.
9. A process as claimed in claims 1 to 8, characterized in that the acidic aqueous cleaning solution is sprayed onto the tableware as a fine, gentle, mist-like liquid spray.
10. A process as claimed in one or more of claims 1 to 8, characterized in that the acidic aqueous cleaning solution is applied to the tableware as foam.
11. A process as claimed in claim 9 or 10, characterized in that the acidic aqueous cleaning solution is applied through suitable nozzles.
12. A process as claimed in one or more of claims 1 to 11, characterized in that the treatment with the acidic aqueous cleaning solution is preceded by an alkaline treatment.
13. A process as claimed in claim 12, characterized in that an aqueous cleaning solution having a pH above 10 is used for the alkaline treatment of the tableware.
14. A process as claimed in one or more of claims 1 to 13, characterized in that the treatment with the acidic aqueous cleaning solution is followed by an alkaline treatment of the tableware.
15. A process as claimed in one or more of claims 12 to 14, characterized in that the tableware is subjected in all to at least three cleaning steps, an alkaline treatment of the tableware being carried out before and after the treatment with the acidic aqueous cleaning solution.
16. A process as claimed in one or more of claims 12 to 15, characterized in that, during the alkaline treatment, the tableware is contacted with one or more aqueous cleaning solutions which contain between 0.1 and 4% by weight of an alkali carrier, preferably a hydroxide selected from sodium hydroxide, potassium hydroxide or mixtures thereof.
17. A process as claimed in one or more of claims 1 to 16, characterized in that the pH of the wastewater produced by the process is below 12, preferably below 11.
18. An institutional dishwashing machine comprising several tanks which are arranged adjacent one another in known manner on the cascade principle and from which rinse or wash liquor is sprayed onto the tableware and then drains back into the tanks, characterized in that the tanks intended for one or more acidic cleaning steps in accordance with the invention with one or more claims 1 to 17 are made of and/or lined with acid-resistant material.
19. A single-tank washing machine, for example a domestic dishwasher, which is suitable for the process claimed in one or more of claims 1 to 15 and which is made of and/or lined with acid-resistant material, more particularly in the places where it comes in to contact with acidic cleaning solutions.
CA2502423A 2002-12-06 2003-11-06 Acidic cleaning method for machine dishwashing Expired - Lifetime CA2502423C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10257391.3 2002-12-06
DE10257391A DE10257391A1 (en) 2002-12-06 2002-12-06 Continuous or discontinuous machine dishwashing of soiled tableware comprises applying acidic aqueous cleaning solution to soiled tableware and performing alkaline treatment before and/or after acidic treatment
PCT/EP2003/012366 WO2004052564A1 (en) 2002-12-06 2003-11-06 Acidic cleaning method for machine dishwashing

Publications (2)

Publication Number Publication Date
CA2502423A1 true CA2502423A1 (en) 2004-06-24
CA2502423C CA2502423C (en) 2010-08-03

Family

ID=32336137

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2502423A Expired - Lifetime CA2502423C (en) 2002-12-06 2003-11-06 Acidic cleaning method for machine dishwashing

Country Status (6)

Country Link
EP (1) EP1567289B2 (en)
AT (1) ATE362807T2 (en)
AU (1) AU2003279362B2 (en)
CA (1) CA2502423C (en)
DE (2) DE10257391A1 (en)
WO (1) WO2004052564A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8092613B2 (en) 2002-05-31 2012-01-10 Ecolab Usa Inc. Methods and compositions for the removal of starch
WO2005068598A1 (en) * 2003-12-18 2005-07-28 Ecolab Inc. Methods and compositions for the removal of starch
US8426349B2 (en) * 2009-05-26 2013-04-23 Delaval Holding Ab Chlorinated alkaline pipeline cleaner with methane sulfonic acid
DE102011017294A1 (en) 2011-04-15 2012-10-18 Meiko Maschinenbau Gmbh & Co. Kg Transport dishwasher with special treatment zones
ES2752079T3 (en) 2011-05-20 2020-04-02 Ecolab Usa Inc Acidic formulations for use in a utensil washing system
BR112013028007A2 (en) * 2011-05-20 2017-01-10 Ecolab Usa Inc non-phosphate detergents and non-phosphoric acids in an alternating system alkalinity / acidity for dishwashing
EP3282004B1 (en) 2011-12-13 2019-07-31 Ecolab USA Inc. Warewashing method
EP3210517B1 (en) 2011-12-13 2021-03-31 Ecolab USA Inc. Dishmachine
WO2016179009A1 (en) * 2015-05-07 2016-11-10 Cryovac, Inc. Container washing and detergent for use thereof
US11421191B1 (en) 2018-11-15 2022-08-23 Ecolab Usa Inc. Acidic cleaner
WO2024164162A1 (en) * 2023-02-08 2024-08-15 Ecolab Usa Inc. A low-temperature, caustic dishware sanitizing method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1628632C3 (en) * 1966-11-26 1980-10-09 Henkel Kgaa, 4000 Duesseldorf Process for machine washing of dishes
DE1703441A1 (en) * 1968-05-21 1971-12-09 Bosch Hausgeraete Gmbh Dishwasher
DE3532552A1 (en) * 1985-09-12 1987-03-12 Henkel Kgaa METHOD FOR ADJUSTING A PH AREA IN THE WASTE WATER AND DEVICE FOR CARRYING OUT THE METHOD
DE3707366A1 (en) * 1987-03-07 1988-09-15 Diversey Gmbh METHOD FOR THE CONTINUOUS OR DISCONTINUOUS MACHINE CLEANING OF CLEANING UTENSILS
DE4113024A1 (en) * 1991-04-20 1992-10-22 Henkel Kgaa METHOD FOR THE MACHINE CLEANING OF Crockery
TW338713B (en) * 1995-09-06 1998-08-21 Sharp Kk A dishwasher
US5879469A (en) * 1997-01-06 1999-03-09 Deeay Technologies Ltd. Dishwashing method and detergent composition therefor
WO2000046329A1 (en) * 1999-02-05 2000-08-10 Unilever Plc Dish washing process and compositions relating thereto
AU2002220549A1 (en) * 2000-10-10 2002-04-22 Johnsondiversey, Inc. A detergent composition and method for warewashing
DE10127919A1 (en) * 2001-06-08 2002-12-19 Ecolab Gmbh & Co Ohg Washing processes, for removing mineral or starch deposits in industrial or domestic dishwashers is effected with both alkaline and acidic stages

Also Published As

Publication number Publication date
EP1567289B1 (en) 2007-05-23
AU2003279362B2 (en) 2009-03-12
EP1567289A1 (en) 2005-08-31
EP1567289B2 (en) 2017-06-07
DE60314007T3 (en) 2017-10-12
CA2502423C (en) 2010-08-03
DE60314007T2 (en) 2008-01-24
DE10257391A1 (en) 2004-06-24
ATE362807T2 (en) 2007-06-15
AU2003279362A2 (en) 2004-06-30
BR0316171A (en) 2005-09-27
WO2004052564A1 (en) 2004-06-24
DE60314007D1 (en) 2007-07-05
AU2003279362A1 (en) 2004-06-30

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Effective date: 20231106