WO1996015710A1 - A method and composition for warewashing without bleach - Google Patents

A method and composition for warewashing without bleach Download PDF

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Publication number
WO1996015710A1
WO1996015710A1 PCT/EP1995/004606 EP9504606W WO9615710A1 WO 1996015710 A1 WO1996015710 A1 WO 1996015710A1 EP 9504606 W EP9504606 W EP 9504606W WO 9615710 A1 WO9615710 A1 WO 9615710A1
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WO
WIPO (PCT)
Prior art keywords
component
aqueous solution
enzyme
cleaning
agent
Prior art date
Application number
PCT/EP1995/004606
Other languages
English (en)
French (fr)
Inventor
Adrianus Joost Lansbergen
Robert Jan Uhlhorn
John Richard Nicholson
Duane Raible
Original Assignee
Unilever N.V.
Unilever Plc
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
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Application filed by Unilever N.V., Unilever Plc filed Critical Unilever N.V.
Priority to EP95940999A priority Critical patent/EP0793439B1/de
Priority to BR9509918A priority patent/BR9509918A/pt
Priority to AU42550/96A priority patent/AU713330B2/en
Priority to JP8516582A priority patent/JPH10509990A/ja
Priority to DE69514824T priority patent/DE69514824T2/de
Publication of WO1996015710A1 publication Critical patent/WO1996015710A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
    • 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 present invention relates to a warewashing detergent composition and its use for cleaning dishware, especially in industrial or institutional systems, as opposed to domestic automatic dishwashing machines.
  • a typical conventional industrial warewashing system consists of a conveyor system separated into prewash, wash, rinse and drying stations. Wash water is typically introduced into the rinse zone of this system and is passed cascade fashion toward a prewash zone, while dishware is transported in a countercurrent direction.
  • Dishwashing compositions used in such systems generally contain a chlorine bleaching agent combined with a cleaning ingredient such as an aqueous solution of a caustic agent and a sequestering agent or builder such as sodium tripolyphosphate.
  • a cleaning ingredient such as an aqueous solution of a caustic agent and a sequestering agent or builder such as sodium tripolyphosphate.
  • EP-A- 282,214 discloses a process for cleaning dirty dishware with a non-directional mist-like spray of a strongly alkaline solution.
  • a highly alkaline spray is potentially hazardous for an operator.
  • An industrial dishwashing process using a low alkaline detergent and an enzyme dosed into either a rinsing or a washing bath of the system is described in WO 94/27488 (Henkel-EcoLab) .
  • the publication describes a means of compensating for the degradation of the enzyme, particularly an amylase, during standstill phases of the system by adding intermittent doses of the enzyme to the washing zone.
  • German patent specification DE-A-4 219 620 describes a domestic dishwasher in which bleach- and enzyme- containing components are dosed in different stages of the wash process.
  • the enzyme is added during the prerinse or at the very beginning of the wash cycle.
  • the bleach is added only during the cleaning cycle after a predetermined time after which the wash liquor reaches a desired temperature. Thus the negative interaction between the bleach and the enzyme is avoided.
  • This approach is not feasible in an industrial dishwasher where a cascade flow of water occurs from one tank to another and wherein the cleaning operation is a continuous process.
  • Bleach agents have been removed from warewashing detergent compositions to minimize the deactivation of enzyme ingredients. It is known in the absence of a bleach that good stain removal (e.g., tea stain removal) may be effected across a range of water hardness by utilizing a strong builder or sequestrant at a relatively high wash pH. Thus, the negative interaction between bleach and enzyme may be avoided while maintaining a good cleaning performance.
  • stain removal e.g., tea stain removal
  • One object of the invention is to provide a chemical cleaning system for an industrial or institutional warewashing process which contains at least two separate components. Each component is dissolved or diluted in an aqueous solution to a concentration useful for cleaning.
  • the cleaning system comprises an enzyme containing component which must be sequentially introduced into the warewashing process so that a 1% aqueous solution of the enzyme dosed into the wash has a solution pH of less than about 9.
  • the second component comprises a cleaning agent which is sequentially dosed into the warewashing system in a separate tank or zone from the area in which the enzyme component is dosed and a 1% aqueous solution of the cleaning agent must be more alkaline than the enzymatic solution by at least about 1 pH value, preferably the cleaning component solution has a pH of from 9.5 to 13.
  • the chemical cleaning system has substantially no bleaching agents among its components.
  • the present invention provides a chemical cleaning system for a multi-tank mechanical warewashing machine comprising at least two separate components for aqueous dissolution or dilution to respective use concentration, a first component comprising a cleaning agent and a second component comprising an enzyme, the system being substantially free of an added bleaching agent and a 1% aqueous solution of the first component being at least about 1 pH unit more alkaline than a 1% aqueous solution of the second component, wherein said components are sequentially dosed into the warewashing machine in different tanks or zones thereof.
  • a method of warewashing in a multi-tank industrial or institutional machine comprising the steps of:
  • Typical industrial warewashing processes are either continuous or non-continuous and are conducted in either a single tank or a multi-tank/ conveyor type machine.
  • a prewash, wash, rinse and drying zone are generally established using partitions. Wash water is introduced into the rinsing zone and is passed cascade fashion back toward the prewash zone while the dirty dishware is transported in a countercurrent direction.
  • the inventive chemical cleaning system may be utilized in any of the conventional warewashing processes, but is especially effective in the multi-tank/ conveyor type systems.
  • contact time between the cleaning composition and the articles to be washed is relatively short. Means of maximizing these contact times are constantly sought while at the same time any negative interaction time of the actives of* the cleaning composition needs to be minimized to provide the best cleaning performance.
  • Amylolytic enzymes are used to remove starch stains.
  • the amylolytic enzymes usable can be derived from bacteria or fungi.
  • Preferred amylolytic enzymes are those prepared and described in GB 1 296 839 which are cultivated from the strains of Bacillus licheniformis NIB 8061 NIB 8059, ATCC 6334. ATCC 6598, ATCC 19945, ATCC 8480 and ACTT 9945 A.
  • Examples of such amylolytic enzymes are those produced and supplied under the trademark Termamyl® by Novo Industri A/S, Copenhagen, Denmark.
  • ⁇ -amylase enzymes which have been mutated by modifying one or more amino acid sequences as described in WO 94/14951 and WO 94/02597 and supplied by Novo Industri under the tradename Durmamyl.
  • Other ⁇ -amylase enzymes useful in the invention are described in EP-A-208,491 (Genencor Int'l).
  • amylolytic enzymes may be used in either granular or liquid form and have enzymatic activities of from about 2 to about 25 Maltose units/milligram. They may be incorporated in the cleaning system of the invention in amount such that the final composition has an amylolytic activity of from 10 3 to 10 8 Maltose units/kilograms, preferably from 10 s to 10 8 Maltose units per kilogra (s) , and more preferably 10 6 to 10 8 Maltose units per kilogram.
  • amylolytic activity referred to herein can be determined by the method described by in P. Bernfeld in "Method of Enzy ology", Vol 1 (1955), pg. 149.
  • proteolytic enzymes may also be incorporated in the cleaning system to remove protein stains.
  • Usable proteolytic enzymes include the subtilisin obtained from strains of Bacillus Subtili ⁇ licheniformi ⁇ , such as the commercially available subtilisins Maxatase supplied by Gist-Brocades N.V., Delft, Holland and Alcalase • supplied by Novo Industri A/S, Copenhagen, Denmark.
  • Particularly suitable proteases are those obtained from a strain of Bacillus having maximum activity throughout a pH range of 8 to 12 and are commercially available from Novo Industri A/S under the tradenames of Esperase and Savinase.
  • Also useful is a protease supplied under the tradename of OxP by Genencor Int'l.
  • proteolytic enzymes are generally presented as granules, such as maru es, prills, p-granulates, etc. or in liquid form.
  • the proteolytic enzyme activities of these samples are from 500 to 6000 glycine units per milligram.
  • proteolytic enzymes may be present in amounts such that the final composition has a proteolytic enzyme activity of from about 10 3 to 10 10 glycine units per kilogram, preferably from 10 5 to 10 10 , more preferably 10° to 10 9 .
  • lipolytic enzymes useful to improve fat removal.
  • lipolytic enzymes include Lipase YL, Amano CE, Wallerstein AW, Lipase MY and Lipolase supplied by Novo Industri.
  • the enzyme containing component is dosed into the warewashing system so that upon aqueous dissolution or dilution to its use concentration, the pH value of a 1% aqueous solution is less than about 9, preferably 7 to 9, most preferably 8 to 9.
  • the enzyme containing component should be introduced into the system separately from the other active components of the cleaning system. Generally, the component will be applied in a washing zone of the system using any conventional means such as suitable spray nozzles or jets which are directed upwards or downwards toward the dishware. In a preferred embodiment, the enzyme containing component is sprayed directly onto the dishware as it moves in a countercurrent direction from the dosed component. A thorough rinsing of the enzyme from the dishware once the contact time is completed should follow.
  • the enzyme containing component should be sequentially dosed into the warewashing process after the cleaning agent containing component and preferably in a separate tank from the tank in which the cleaning agent containing component is introduced.
  • an aqueous solution of the component which contains the cleaning agent must have a higher alkalinity than that of the enzyme component by at least about one unit, preferably more than one pH unit.
  • a 1% aqueous solution of the cleaning component which results from its dissolution or dilution to its use concentration should have a pH of at least about 1 pH unit more alkaline than a pH value of a 1% aqueous solution of the enzymatic component.
  • the cleaning agent component solution has a pH of 9.5 or greater, preferably 9.5 to 13.
  • more than one component may contain a cleaning agent so that the component which contains the greatest total amount (that is % by weight) of the cleaning agent is referred to by the phrase "that component which contains the cleaning agent or the cleaning agent containing component". It will also be appreciated that the total cleaning agent in any given component may comprise two or more different and individual cleaning agents as described below.
  • the concentration of the cleaning agent following its dissolution or dilution is such that the weight of the component per volume unit of water should be in the range of 1 to 5 grams per liter, preferably from 1 to 4 grams per liter, more preferably from 1 to 3 grams per liter.
  • the cleaning agent may be selected from a caustic or strongly alkaline material, a detergency builder, a surfactant or a mixture thereof.
  • Suitable caustic agents include alkaline metal hydroxides such as sodium or potassium hydroxides, alkaline metal silicates such as metasilicates, preferably sodium metasilicate, and other alkaline caustic materials such as borax.
  • alkaline metal hydroxides such as sodium or potassium hydroxides
  • alkaline metal silicates such as metasilicates, preferably sodium metasilicate, and other alkaline caustic materials such as borax.
  • sodium silicate having a mole ratio of Si0 2 :Na 2 0 of from about 1 to about 3.3, preferably from about 1.8 to about 2.2 generally referred to as sodium disilicate.
  • Suitable builder materials are well known in the art and many types of organic and inorganic compounds have been extensively described in the literature.
  • Builder materials include both the phosphate and non-phosphate compounds. They are generally used in cleaning compositions to provide alkalinity and buffering capacity, prevent flocculation, maintain ionic strength, extract metals from soils, remove alkaline earth metal ions from washing solutions.
  • the builder material usable herein can be any one or mixtures of the various phosphate and non-phosphate builder materials.
  • non-phosphate builder materials can also be used, such as, for example, the alkali metal citrates carbonates and bicarbonates; and the salts of nitrilotriacetic acid (NTA) ; dipicolinic acid (DPA) , oxydisuccinic acid (ODS) , alkyl and alkenyl succinates (AKS) ; ethylenediamine tetracetates, oxidized heteropolymeric polysaccharides, polycarboxylates such as polymaleates, polyacetates, polyhydroxyacrylates, polyacrylate/polymaleate and polyacrylate;polymethacrylate copolymers and the terpolymer of polyacrylate/polymaleate and vinylacetate (ex Huls) , as well as zeolites; layered silicas and mixtures thereof.
  • NTA nitrilo
  • builders may be present in more than one component of the system but in the only component which contains builder, or in that component which contains the most total builder material (in % by wt.), in the range of from 1 to 50, preferably from 5 to 40, more preferably from 10 to 30.
  • Particularly preferred builders are citrates, DPA, ODS, alkenyl succinates, carbonates, bicarbonates, the higher molecular weight block copolymers ITA/VA having Mw greater than 60,000, maleic anhydride/ (meth)acrylic acid copolymers, e.g. Sokalan CP5 ex. BASF; NTA and the terpolymer of polyacrylate/polymaleate and vinylacetate (ex. Huls) .
  • Scale formation on dishes and machine parts is an important problem that needs to be resolved or at least mitigated in formulating a machine warewashing product, especially in the case of low-phosphate (e.g. less than the* equivalent of 20% by weight, particularly 10% by weight of sodium triphosphate) and phosphate-free machine warewashing compositions, particularly zero-P machine warewashing compositions.
  • low-phosphate e.g. less than the* equivalent of 20% by weight, particularly 10% by weight of sodium triphosphate
  • phosphate-free machine warewashing compositions particularly zero-P machine warewashing compositions.
  • co-builders such as polyacrylic acids or polyacrylates (PAA)
  • PAA polyacrylic acids or polyacrylates
  • the various organic polyphosphonates e.g. of the Dequest range
  • the block co ⁇ polymers of formula (I) as defined in published PCT patent specification WO 94/17170 may also be used.
  • the amount of co-builder may be in the range of from 0.5 to 10, preferably from 0.5 to .5, and more preferably from 1 to 5% by weight.
  • the cleaning agent may comprise one or more surfactants.
  • Surfactant may also be present in one or more of components of the system. However, in the component(s) which contain the most surfactant, they may be present in the range of from 0.5 to 20, preferably from 1 to 15, and moire preferably from 3 to 15% by weight.
  • Such surfactant if present, is of course separate from any surfactant used as rinse aid in the rinse phase, after use of a system according to the present invention. Normally, in a properly built or highly built composition as is conventional, only small amounts of low- to non-foaming nonionic surfactant, to aid detergency and particularly to suppress excessive foaming caused by some protein soil.
  • High HLB nonionic surfactants such as the high HLB nonionic surfactants, the anionic sulphate or sulphonate surfactants and the alkyl polyglycoside class of surfactants, may be used in lower builder-containing active/enzyme-based compositions.
  • highly detersive surfactants such as the high HLB nonionic surfactants, the anionic sulphate or sulphonate surfactants and the alkyl polyglycoside class of surfactants, may be used in lower builder-containing active/enzyme-based compositions.
  • compositions may further include a defoamer.
  • Suitable defoamers include mono- and distearyl acid phosphate, silicone oil and mineral oil. Preferred antifoa systems are described in US patent application 95-R158-EDG.
  • the compositions may include 0.02 to 2% by weight of defoamer, or preferably 0.05 to 1.0%.
  • Any known silver anti-tarnish agents may also be included such as benzotriazole or 1,3-N azole compounds described in copending U.S. applications having U.S. Serial Numbers 08/302,284 (Angevaare et al.) and 08/301,459 (Gary et al.) .
  • Minor amounts of various other components may be present in the chemical cleaning composition.
  • These components include solvents, and hydrotropes such as ethanol, isopropanol and xylene sulfonates, flow control agents; enzyme stabilizing agents; soil suspending agents; anti-redeposition agents; anti-tarnish agents; anti-corrosion agents; colorants, bleach scavengers (e.g. sulfite) and other functional additives.
  • solvents, and hydrotropes such as ethanol, isopropanol and xylene sulfonates, flow control agents; enzyme stabilizing agents; soil suspending agents; anti-redeposition agents; anti-tarnish agents; anti-corrosion agents; colorants, bleach scavengers (e.g. sulfite) and other functional additives.
  • bleach scavengers e.g. sulfite
  • Components of the present invention may independently be formulated in the form of solids, (optionally to be dissolved 5 before use) , aqueous liquids or non-aqueous liquids, also to be diluted before use.
  • NTA Nitrilotriacetate
  • Nonionic surfactant 2% 2%
  • Neither of the sample formulations contained a bleaching 30 agent or an enzyme.
  • Porcelain cups were stained with tea three times prior to washing. Cleaning experiments were conducted in a dishwashing machine. The temperature of the water in the main wash was 55°C and the wash time was 1 min.
  • the cleaned dishware was then observed by a panel which rated tea stain removal on a scale from 0 to 5 with 0 indicating no visible tea stain and 5 indicating heavy staining.
  • the panel results are as follows:
  • Sample 1 described in Example 1 was prepared with the addition of an amylase enzyme (supplied as Termamyl 300L by Novo) to provide an enzymatic activity of 2xl0 7 Maltose units per kilogram.
  • a second sample was prepared with the Termamyl enzyme, but no builder was present.
  • Each sample was adjusted to pH values of 8.5 and 10 and the four samples were observed for enzyme stability and starch removal as follows.
  • Porcelain plates were soiled with potato starch.
  • a single tank Industrial dishwashing machine was run over a period of about 30-40 minutes during which time 11 wash cycles were completed. At the end of each wash cycle, fresh product was dosed to compensate for the dilution of the wash solution by the rinse water.
  • the enzyme stability of the amylase was measured by conventional means.
  • Residual starch on the cleaned dishware was rated by a panel on a percentage scale with 100% indicating residual soil over the entire area of the plate and 0 indicating complete removal of the soil.
  • the observed amylase stability and cleaning effectiveness in the four samples were as follows: Elapsed Samples (% Loss of Amylase Activity) time (minutes) NTA and NTA and Amylase Amylase Amylase Amylase pH 10 pH 8.5 pH 10 pH 8.5
  • amylase stability is improved significantly at pH 8.5 compared to pH 10, even at pH 8.5 there are clear benefits for not having a strong sequestrant present in the wash tank wherein the amylase enzyme is dosed.
  • the cleaning efficiency of a composition according to the invention was compared to the cleaning of a commercial composition used in warewashing.
  • the evaluation was carried out in a multi-chamber machine (ex. Hobart) to assess the real benefits to be gained from a sequential dosing of ingredients and a pH differential between the washing zones into which the cleaning and enzyme components are dosed.
  • the inventive composition having two (2) components and no bleaching agent was prepared as follows:
  • the pH of a 1% aqueous solution of the cleaning component was adjusted to pH 9.8.
  • the cleaning agent component was dosed into a wash zone in an amount of 2 grams per liter followed by a sequential dosing of an enzymatic component.
  • Enzymatic Component 100 ppm of an amylase (Termamyl 300L supplied by Novo) was dosed into the last washing zone following the dosing of the cleaning component.
  • the pH of a 1% aqueous solution of the enzymatic component was 8.5.
  • the cleaning efficiency of the inventive composition was compared to a commercial composition of the prior art having the following cleaning and bleach components: A. Cleaning Component
  • the pH of a 1% aqueous solution of the cleaning component was about 11.
  • the bleach containing component was first dosed into a prewash or wash zone in an amount of 0.5 g/liter, followed by a sequential dosing of the cleaning component into a wash zone in an amount of 2 grams per liter.
  • Porcelain cups were stained with tea three times prior to washing. Porcelain plates were soiled with potato starch. To mimic the gradual buildup of starch soil due to incomplete starch removal in one wash, the starch plates were resoiled after the first wash and then subjected to further consecutive wash/starch soiling procedures.
  • inventive formula which does not contain a bleaching agent but does have an enzymatic component which has a pH of at least one unit less than the pH value of the cleaning component shows significantly improved cleaning performance over the performance of the commercial product with bleach.
  • Sequential dosing of the cleaning agent and enzyme components into separate wash tanks gives significantly improved starch removal compared to the situation where cleaning agent and enzyme are separately dosed into the same wash tank.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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PCT/EP1995/004606 1994-11-24 1995-11-21 A method and composition for warewashing without bleach WO1996015710A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95940999A EP0793439B1 (de) 1994-11-24 1995-11-21 Verfahren zum geschirrwaschen ohne verwendung von bleichmitteln
BR9509918A BR9509918A (pt) 1994-11-24 1995-11-21 Sistema químico de limpeza para uma máquina mecânica de lavar louça de múltiplos tanques e processo de lavagem de louça em uma máquina industrial ou institucional de múltiplos tanques
AU42550/96A AU713330B2 (en) 1994-11-24 1995-11-21 A method and composition for warewashing without bleach
JP8516582A JPH10509990A (ja) 1994-11-24 1995-11-21 漂白剤なしに食器洗浄するための方法および組成物
DE69514824T DE69514824T2 (de) 1994-11-24 1995-11-21 Verfahren zum geschirrwaschen ohne verwendung von bleichmitteln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9423234.5 1994-11-24
GB9423234A GB9423234D0 (en) 1994-11-24 1994-11-24 Cleaning compositions and their use

Publications (1)

Publication Number Publication Date
WO1996015710A1 true WO1996015710A1 (en) 1996-05-30

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PCT/EP1995/004606 WO1996015710A1 (en) 1994-11-24 1995-11-21 A method and composition for warewashing without bleach

Country Status (10)

Country Link
EP (1) EP0793439B1 (de)
JP (1) JPH10509990A (de)
AU (1) AU713330B2 (de)
BR (1) BR9509918A (de)
CA (1) CA2202162A1 (de)
DE (1) DE69514824T2 (de)
ES (1) ES2142504T3 (de)
GB (1) GB9423234D0 (de)
WO (1) WO1996015710A1 (de)
ZA (1) ZA959924B (de)

Cited By (11)

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Publication number Priority date Publication date Assignee Title
WO1999024539A1 (en) * 1997-11-10 1999-05-20 The Procter & Gamble Company Method for softening soil on hard surfaces
WO2002092747A1 (en) * 2001-05-14 2002-11-21 The Procter & Gamble Company Dishwashing method
EP1347039A1 (de) * 2002-03-18 2003-09-24 Chemische Fabrik Dr. Weigert GmbH & Co. KG. Verfahren zur Reinigung von Geschirr
EP1657297A1 (de) * 2004-11-15 2006-05-17 Chemische Fabrik Dr. Weigert(GMBH & CO.) Verfahren zum Reinigen von Geschirr
WO2006119162A1 (en) * 2005-05-04 2006-11-09 Johnsondiversey, Inc. Warewashing system containing low levels of surfactant
US7977295B2 (en) 2000-10-27 2011-07-12 Bsh Bosch Und Siemens Hausgeraete Gmbh Method for mechanical cleaning of textiles or solid objects comprising encapsulated enzymes
US8343286B2 (en) 2008-12-02 2013-01-01 Diversey, Inc. Ware washing system containing cationic starch
US8647444B2 (en) 2007-07-05 2014-02-11 Diversey, Inc. Rinse aid
EP3741283A1 (de) * 2019-05-22 2020-11-25 The Procter & Gamble Company Automatisches geschirrspülverfahren
IT201900022392A1 (it) * 2019-11-28 2021-05-28 Salros S R L Composizione di lavaggio liquida a componenti separati, per bucato in macchine lavatrici automatiche
EP3950913A1 (de) * 2020-08-04 2022-02-09 The Procter & Gamble Company Automatisches geschirrspülverfahren und verpackung

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Publication number Priority date Publication date Assignee Title
US20120318303A1 (en) * 2011-06-14 2012-12-20 Ecolab Usa Inc. Non-bleaching procedure for the removal of tea and coffee stains

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GB1296839A (de) * 1969-05-29 1972-11-22
GB2189520A (en) * 1986-03-21 1987-10-28 Unilever Plc Washing and bleaching process
DE4219620A1 (de) * 1992-06-16 1993-12-23 Licentia Gmbh Verfahren zur Reinigungsmittelzugabe bei Haushalt-Geschirrspülmaschinen
WO1994027488A1 (de) * 1993-05-25 1994-12-08 Henkel-Ecolab Gmbh & Co. Ohg Verfahren und vorrichtung zur maschinellen geschirreinigung

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DE3707366A1 (de) * 1987-03-07 1988-09-15 Diversey Gmbh Verfahren zur kontinuierlichen oder diskontinuierlichen maschinellen reinigung von gebrauchsgeschirr
DE4324106C1 (de) * 1993-05-25 1994-09-15 Henkel Ecolab Gmbh & Co Ohg Verfahren und Vorrichtung zur Zudosierung von Wirkstoffen zu einer Spülmaschine

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Publication number Priority date Publication date Assignee Title
GB1296839A (de) * 1969-05-29 1972-11-22
GB2189520A (en) * 1986-03-21 1987-10-28 Unilever Plc Washing and bleaching process
DE4219620A1 (de) * 1992-06-16 1993-12-23 Licentia Gmbh Verfahren zur Reinigungsmittelzugabe bei Haushalt-Geschirrspülmaschinen
WO1994027488A1 (de) * 1993-05-25 1994-12-08 Henkel-Ecolab Gmbh & Co. Ohg Verfahren und vorrichtung zur maschinellen geschirreinigung

Cited By (20)

* Cited by examiner, † Cited by third party
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WO1999024539A1 (en) * 1997-11-10 1999-05-20 The Procter & Gamble Company Method for softening soil on hard surfaces
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AU4255096A (en) 1996-06-17
EP0793439B1 (de) 2000-01-26
EP0793439A1 (de) 1997-09-10
DE69514824D1 (de) 2000-03-02
GB9423234D0 (en) 1995-01-04
CA2202162A1 (en) 1996-05-30
DE69514824T2 (de) 2000-06-15
AU713330B2 (en) 1999-12-02
BR9509918A (pt) 1997-09-30
ZA959924B (en) 1997-05-22
JPH10509990A (ja) 1998-09-29
ES2142504T3 (es) 2000-04-16

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