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EP1392807A1 - Procede d'epuration destine a l'elimination d'amidon - Google Patents

Procede d'epuration destine a l'elimination d'amidon

Info

Publication number
EP1392807A1
EP1392807A1 EP02743135A EP02743135A EP1392807A1 EP 1392807 A1 EP1392807 A1 EP 1392807A1 EP 02743135 A EP02743135 A EP 02743135A EP 02743135 A EP02743135 A EP 02743135A EP 1392807 A1 EP1392807 A1 EP 1392807A1
Authority
EP
European Patent Office
Prior art keywords
acid
cleaning
alkaline
acidic
cleaning step
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
EP02743135A
Other languages
German (de)
English (en)
Other versions
EP1392807B1 (fr
Inventor
Werner Strothoff
Helmut Maier
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
Ecolab Inc
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
Application filed by Ecolab Inc filed Critical Ecolab Inc
Publication of EP1392807A1 publication Critical patent/EP1392807A1/fr
Application granted granted Critical
Publication of EP1392807B1 publication Critical patent/EP1392807B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/08—Acids
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/06—Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/265—Carboxylic acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/34—Organic compounds containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/36—Organic compounds containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/40—Specific cleaning or washing processes
    • C11D2111/44—Multi-step processes

Definitions

  • the invention relates to a cleaning method comprising an alkaline and an acidic cleaning step and one or more further alkaline and / or acidic cleaning steps, in particular for machine dishwashing in commercial dishwashers, in which starch deposits in particular can be removed in an excellent manner.
  • washing machines usually contain several tanks arranged one behind the other, from which rinsing or washing liquor is sprayed against the washing goods passing through the machine.
  • the tanks are generally placed in a cascade, with the washing or washing liquor passing through the tanks one after the other from the wash goods outlet end to the wash goods inlet end.
  • Fresh water is usually supplied to the machines at the outlet end.
  • the required amount of cleaning agent is dosed in at least one wash tank, also called a metering tank.
  • the detergent is usually added automatically as a function of the conductivity or the pH of the wash liquor or, if appropriate, also by means of a time-controlled or cycle-controlled metering pump. It may also be possible for separate components to be metered in separately.
  • a lye-based solution based on an aqueous alkali hydroxide solution may be introduced.
  • One or more additives can then be added to this basic solution as required.
  • the dosage of these additives is usually proportional to the addition of the base lye or time-controlled.
  • the additives can also be metered as a function of the cycle of the chain conveying the laundry through the machine.
  • metering of additives or increasing the additive concentration on the basis of the detection of the proportion of additive in the base liquor is also possible via sensory detection of a tracer contained in the additive.
  • the cleaning agents used in practice often do not prevent starch deposits that adhere to the items to be washed as part of the usual mechanical cleaning in a cleaning machine and do not remove existing starch deposits.
  • the dishes that have starch deposits are therefore subjected to a so-called basic cleaning at certain time intervals.
  • a basic cleaning is in the rinse or. Wash liquor set a significantly higher concentration of detergent compared to normal rinsing processes.
  • Another alternative is to spray a highly concentrated alkaline detergent onto the dishes as part of a normal dishwashing cycle.
  • DE-AS 12 85 087 Also known from DE-AS 12 85 087 is a method for machine dishwashing, in which an alkaline detergent is dosed in the main wash cycle and an enzyme-containing, in particular amylase-containing, rinse aid in the post-rinse and optionally pre-rinse cycle into the dishwasher. This is done in order to reduce the starch formed on the dishes in the rinse and possibly pre-wash cycle.
  • a low-alkaline cleaner in particular based on phosphate or nitrilotriacetic acid or its salts (NTA)
  • NTA nitrilotriacetic acid or its salts
  • an enzyme preferably carbohydrate-degrading enzyme, containing, in particular amylase-containing, cleaning enhancer
  • a low-alkaline cleaner in the usual concentration in conjunction with an enzyme-containing cleaning booster leads to excellent removal and inhibition of the starch build-up on the dishes, even with the short contact times of 10 to 180 seconds that are customary in commercial dishwashers.
  • the present invention relates to a cleaning method comprising an alkaline and an acidic cleaning step and one or more further alkaline and / or acidic cleaning steps, in particular for machine dishwashing in commercial dishwashers.
  • WO 98/30673 a tableware cleaning method is already known, in which a first and a second cleaning agent are used and one of the cleaning agents mentioned has an acidic pH value and the other has an alkaline pH value, before, between and after use the detergent mentioned is rinsed with water.
  • This method should be used in a preferred manner in order to achieve rapid disinfection of the dishes.
  • the present invention differs significantly from this known method. While WO 98/30673 speaks of an alkaline and an acidic cleaning step, the present invention is based on a method in which two cleaning steps take place in a uniform pH range, which is in the acidic or alkaline pH range, and at least one third cleaning step opposite pH takes place.
  • an acidic cleaning step follows at least one alkaline cleaning step and an alkaline cleaning step follows this acidic cleaning step, with the proviso that a total of at least three and particularly preferably no more than eight cleaning steps are contained.
  • the first of the cleaning steps mentioned is an alkaline cleaning step.
  • the surface to be cleaned is brought into contact 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 -, Potassium hydroxide or mixtures thereof, it being particularly preferred if the pH above 9 is particularly preferred is over 10.
  • an alkali carrier preferably a hydroxide selected from sodium -, Potassium hydroxide or mixtures thereof, it being particularly preferred if the pH above 9 is particularly preferred is over 10.
  • the alkalinity is not required to be higher than 13.
  • alkali carriers in addition to or instead of hydroxides selected from sodium and potassium hydroxide, examples include alkali silicates, ethanolamines such as triethanolamine, diethanolamine and monoethanolamine, and alkali carbonates alkali carriers, preferably a hydroxide selected from sodium and potassium hydroxide.
  • alkali silicates such as triethanolamine, diethanolamine and monoethanolamine
  • alkali carbonates alkali carriers preferably a hydroxide selected from sodium and potassium hydroxide.
  • other alkali carriers can also be used, since it is primarily a question of raising the pH.
  • the surface to be cleaned is brought into contact with one or more aqueous cleaning solutions which are between 0.1 and 10% by weight, particularly preferably between 0.1 and Contain 5 wt .-% of one or more acids, it being preferred if the pH is below 5, very particularly preferably below 2, and / or are particularly preferably selected from the mineral and / or organic acids and very particularly are preferably sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid, formic acid, acetic acid, glycolic acid, citric acid, maleic acid, lactic acid, gluconic acid, alkylsulfonic acid, amidosulfonic acid, succinic acid, glutaric acid, adipic acid, phosphonic acids, polyacrylic acids or mixtures thereof.
  • aqueous cleaning solutions which are between 0.1 and 10% by weight, particularly preferably between 0.1 and Contain 5 wt .-% of one or more acids, it being preferred if the pH is below 5, very particularly preferably below 2, and / or are
  • the acid mentioned is a component with complexing properties.
  • the surface to be cleaned is preferably brought into contact with one or more aqueous cleaning solutions which contain at least one corrosion inhibitor and / or a conventional complexing agent, particularly preferably selected from the phosphonic acids, in particular dioctylphosphonic acid.
  • the temperature of the cleaning solutions mentioned is between 35 and 80 ° C.
  • the surface to be cleaned is treated with a preferably acidic or neutral aqueous solution containing at least one rinse aid component.
  • the time required for the mentioned cleaning steps of the method according to the invention is preferably between 10 seconds and 30 minutes. It is particularly important to consider whether the method according to the invention is used in a household or commercial machine. Because of the requirements specified in practice, the time required per cleaning step in commercial machines is preferably between 10 seconds and 10 minutes. In contrast, values of 1 to 30 minutes per cleaning step are common for household machines.
  • the process according to the invention is very particularly preferred to use for removing starch from surfaces. It has also been shown that the process according to the invention is particularly effective in removing mineral impurities.
  • the process according to the invention can be used advantageously in particular in the case of residues, such as coffee or tea residues, which have proportions of mineral impurities.
  • the method according to the invention is preferably used for cleaning dishes in the household and particularly preferably in the commercial sector.
  • the earlier alkaline step in the process sequence has a lower pH than the later alkaline step in the process sequence. This is advantageous in order to keep the consumption as low as possible during an acidic step in the meantime.
  • the method according to the invention can be carried out with multi-tank or single-tank machines.
  • the acidic component is preferably dosed via the rinse arm.
  • the main cleaning bath is preferably alkaline. Such an embodiment of the method according to the invention is also preferred when using household machines.
  • Another object of the present invention is a commercial dishwasher which contains a plurality of tanks which are cascaded together in a known manner and from which washing or washing liquor is sprayed against the dishes in order to then run back into the tanks, the tanks, the are provided for one or more acidic cleaning steps due to a method according to the invention, consist of acid-resistant material and / or are lined with acid-resistant material.
  • the present invention also relates to a one-tank washing machine, for example a domestic dishwasher, which is suitable for a method according to the invention and which consists of acid-resistant material and / or is lined with acid-resistant material at those points which come into contact with acidic cleaning solutions as a result of the method according to the invention is, especially if it is not foreseeable that these places will come into contact with alkaline agents later.
  • a one-tank washing machine for example a domestic dishwasher
  • the cleaning and spraying solutions were made available on the basis of softened water.
  • the cleaning temperature in the Krefft ® single-tank dishwasher was 60 ° C.
  • the cleaning results were rated depending on the cleaning success with numbers from 1 (no cleaning success recognizable) to 10 (complete removal of the impurities).

Landscapes

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

Abstract

L'invention concerne un procédé d'épuration comportant une étape d'épuration alcaline et une étape d'épuration acide, ainsi qu'une ou plusieurs autres étapes d'épuration alcalines et/ou acides. Le procédé selon l'invention est notamment destiné au lavage de la vaisselle dans des lave-vaisselle courants, ledit procédé permettant d'éliminer des dépôts d'amidon de manière particulièrement efficace.
EP02743135A 2001-06-08 2002-05-31 Procede d'epuration destine a l'elimination d'amidon Expired - Lifetime EP1392807B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10127919 2001-06-08
DE10127919A DE10127919A1 (de) 2001-06-08 2001-06-08 Reinigungsverfahren zur Stärkeentfernung
PCT/EP2002/005964 WO2002100993A1 (fr) 2001-06-08 2002-05-31 Procede d'epuration destine a l'elimination d'amidon

Publications (2)

Publication Number Publication Date
EP1392807A1 true EP1392807A1 (fr) 2004-03-03
EP1392807B1 EP1392807B1 (fr) 2004-09-22

Family

ID=7687680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02743135A Expired - Lifetime EP1392807B1 (fr) 2001-06-08 2002-05-31 Procede d'epuration destine a l'elimination d'amidon

Country Status (9)

Country Link
US (1) US20040173244A1 (fr)
EP (1) EP1392807B1 (fr)
JP (1) JP4202910B2 (fr)
AT (1) ATE277157T1 (fr)
CA (1) CA2448548C (fr)
DE (2) DE10127919A1 (fr)
ES (1) ES2230503T3 (fr)
PL (1) PL201167B1 (fr)
WO (1) WO2002100993A1 (fr)

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US7942980B2 (en) * 2006-02-09 2011-05-17 Ecolab Usa Inc. Starch removal process
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US20090131297A1 (en) * 2007-11-20 2009-05-21 Smith Kim R Rinse aid composition for use in automatic dishwashing machines, and methods for manufacturing and using
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US9752105B2 (en) 2012-09-13 2017-09-05 Ecolab Usa Inc. Two step method of cleaning, sanitizing, and rinsing a surface
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JP6666078B2 (ja) * 2015-05-15 2020-03-13 花王株式会社 食器用浸漬洗浄剤組成物及び洗浄方法
EP3159394A1 (fr) 2015-10-20 2017-04-26 The Procter and Gamble Company Procédé pour éliminer des taches par traitement de textiles avec de l'amidon et de l'amylase
US10100245B1 (en) 2017-05-15 2018-10-16 Saudi Arabian Oil Company Enhancing acid fracture conductivity
EP4296345A3 (fr) 2017-06-22 2024-03-13 Ecolab USA Inc. Blanchiment à l'aide d'acide peroxyformique et d'un catalyseur à l'oxygène
US10655443B2 (en) 2017-09-21 2020-05-19 Saudi Arabian Oil Company Pulsed hydraulic fracturing with geopolymer precursor fluids
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Also Published As

Publication number Publication date
EP1392807B1 (fr) 2004-09-22
CA2448548A1 (fr) 2002-12-19
PL367269A1 (en) 2005-02-21
PL201167B1 (pl) 2009-03-31
WO2002100993A1 (fr) 2002-12-19
DE10127919A1 (de) 2002-12-19
US20040173244A1 (en) 2004-09-09
DE50201125D1 (de) 2004-10-28
ATE277157T1 (de) 2004-10-15
ES2230503T3 (es) 2005-05-01
CA2448548C (fr) 2010-05-25
JP2004533301A (ja) 2004-11-04
JP4202910B2 (ja) 2008-12-24

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