EP0793439B1 - Procede de lavage industriel de vaisselle sans agent de blanchiment - Google Patents

Procede de lavage industriel de vaisselle sans agent de blanchiment Download PDF

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Publication number
EP0793439B1
EP0793439B1 EP95940999A EP95940999A EP0793439B1 EP 0793439 B1 EP0793439 B1 EP 0793439B1 EP 95940999 A EP95940999 A EP 95940999A EP 95940999 A EP95940999 A EP 95940999A EP 0793439 B1 EP0793439 B1 EP 0793439B1
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EP
European Patent Office
Prior art keywords
component
cleaning
enzyme
aqueous solution
warewashing
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.)
Revoked
Application number
EP95940999A
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German (de)
English (en)
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EP0793439A1 (fr
Inventor
Adrianus Joost Lansbergen
Robert Jan Uhlhorn
John Richard Nicholson
Duane Unilever Research US Inc. RAIBLE
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Diversey Inc
Original Assignee
Unilever PLC
Unilever NV
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Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP0793439A1 publication Critical patent/EP0793439A1/fr
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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
    • C11D2111/14—
    • C11D2111/44—

Definitions

  • the present invention relates to a method of warewashing 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.
  • DE-C-4324106 discloses a method of warewashing for industrial or institutional dishwashing machines, wherein an enzyme component Thermamyl 300L and a phosphate or NTA-based low alkaline cleaning component are added to the cleaning liquor in order to optimize the cleaning results.
  • 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 an industrial or institutional warewashing process involving a chemical cleaning system which contains at least two separate components. Each component is dissolved or diluted in an aqueous solution to a concentration useful for cleaning.
  • the chemical cleaning system has substantially no bleaching agents among its components.
  • the present invention provides a method of warewashing in a multi-tank industrial or institutional machine, said method 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 method of warewashing 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.
  • Adequate cleaning performance has been achieved in the present invention in spite of the elimination of a bleaching agent.
  • Reason is that bleaches generally create a negative interaction with other cleaning components such as enzymes.
  • 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-A-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-A-94/14951 and WO-A-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 2 to 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 5 to 10 8 Maltose units per kilogram(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 Enzymology", 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 Subtilis licheniformis, 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'1.
  • proteolytic enzymes are generally presented as granules, such as marumes, prills or p-granulates, 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 6 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 desirably less than 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 is sequentially dosed into the warewashing process after the cleaning agent containing component 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 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 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
  • borax alkaline caustic materials
  • sodium silicate having a mole ratio of SiO 2 :Na 2 O of from 1 to 3.3, preferably from 1.8 to 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 tetraacetates, 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 nitrilotriacetic acid
  • DPA dipi
  • They 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), and the various organic polyphosphonates, e.g. of the Dequest range, may be incorporated in one or more system components.
  • PAA polyacrylic acids or polyacrylates
  • the block copolymers of formula (I) as defined in published PCT patent specification WO-A-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 more 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.
  • compositions may further include a defoamer.
  • Suitable defoamers include mono- and distearyl acid phosphate, silicone oil and mineral oil.
  • compositions may include 0.02 to 2% by weight of defoamer, or preferably 0.05 to 1.0%.
  • silver anti-tarnish agents may also be included such as benzotriazole or 1,3-N azole compounds described in WO-A-95/10588.
  • 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 used in the present invention may independently be formulated in the form of solids, (optionally to be dissolved before use), aqueous liquids or non-aqueous liquids, also to be diluted before use.
  • Neither of the sample formulations contained a bleaching 30 agent or an enzyme.
  • the pH value of a 1% aqueous solution of each of the samples was adjusted by the addition of either NaOH or H 2 SO 4 to a pH value of between 7 and 11.
  • 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.
  • 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 2x10 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: Samples (% Loss of Amylase Activity) Elapsed time (minutes) NTA and Amylase pH 10 NTA and Amylase pH 8.5 Amylase pH 10 Amylase pH 8.5 0 0 0 0 0 5 30 15 5 5 10 30 15 0 0 15 40 10 0 0 20 40 10 0 0 25 50 10 0 0 30 50 5 0 0 0 Sample Residual Starch (% Area) NTA and Amylase pH 10 80% NTA and Amylase pH 8.5 45% Amylase pH 10 60% Amylase pH 8.5 25%
  • Example 2 The significant effect of the presence of a strong builder on the amylase enzyme stability at a high alkalinity was again observed in wash solutions of 65°C. High temperature washes are conventionally used in industrial and institutional warewashing and in a multi-chamber machine are most likely to be encountered in the final wash tank.
  • the four compositions of Example 2 were prepared and the amylase stability was measured at a temperature of 65°C with the following results (expressed as % residual Amylase Activity): Elapsed Time NTA & Amylase pH 10 NTA & Amylase pH 8.5 Amylase pH 10 Amylase pH 8.5 0 100 100 100 100 10 30 82 92 98 20 20 70 87 100 30 18 60 80 98 40 18 55 76 100 50 19 45 72 98 60 17 43 63 100
  • 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 as used 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.
  • 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.
  • the cleaning efficiency of the inventive composition was compared to a commercial composition of the prior art having the following cleaning and bleach components:
  • Active sodium hydroxide 50%) 70 phosphono 1,2,4, butanetricarboxylic acid 6 polyacrylic acid, sodium salt 8 water to 100
  • 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.

Claims (7)

  1. Procédé de lavage de vaisselle dans une machine équipée de plusieurs cuves, dans le secteur industriel ou collectif comprenant les étapes consistant:
    a) à choisir un système de lavage chimique comprenant au moins deux composants séparés pour faire une dissolution ou une dilution aqueuse à leur concentration d'utilisation respective, dans deux zones séparées d'un lave-vaisselle, le premier composant comprenant un composant de lavage et le second composant comprenant une enzyme, le système étant essentiellement exempt d'agent de blanchiment ajouté et une solution aqueuse à 1% du premier composant étant d'au moins 1 unité pH plus basique qu'une solution aqueuse à 1% du second composant;
    b) à introduire le premier composant dans la zone de lavage pour laver la vaisselle sale;
    c) à introduire ensuite le second composant dans une seconde zone de lavage pour mieux laver encore la vaisselle; et
    d) à rincer la vaisselle avec une solution aqueuse pour éliminer essentiellement le système de lavage chimique.
  2. Procédé selon la revendication 1, dans lequel la solution aqueuse du premier composant possède un pH de 9,5 ou supérieur.
  3. Procédé selon les revendications 1 ou 2, dans lequel la solution aqueuse du second composant possède un pH inférieur à 9,0.
  4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel le premier composant est choisi dans le groupe composé d'une matière caustique ou fortement basique d'un adjuvant de détergence, d'un tensio-actif et un mélange de ceux-ci.
  5. Procédé selon la revendication 4, dans lequel l'adjuvant de détergence est une matière phosphate ou non phosphate.
  6. Procédé selon la revendication 5, dans lequel l'adjuvant non phosphate est choisi dans le groupe formé par les sels de l'acide nitrilotriacétique, l'acide dipicolinique, l'acide oxydisuccinique, le succinate d'alkyle, le succinate d'alcényle, l'éthylènediaminetetraacétate, les polysaccharides hétéropolymères oxydés, les polycarboxylates, les zéolithes, les silices en couches et leurs mélanges.
  7. Procédé selon l'une quelconque des revendications 1 à 6, dans lequel l'enzyme est choisie dans le groupe formé d'une amylase, d'une protéase, d'une lipase ou leurs mélanges.
EP95940999A 1994-11-24 1995-11-21 Procede de lavage industriel de vaisselle sans agent de blanchiment Revoked EP0793439B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9423234 1994-11-24
GB9423234A GB9423234D0 (en) 1994-11-24 1994-11-24 Cleaning compositions and their use
PCT/EP1995/004606 WO1996015710A1 (fr) 1994-11-24 1995-11-21 Procede et composition destines au lavage industriel de vaisselle sans agent de blanchiment

Publications (2)

Publication Number Publication Date
EP0793439A1 EP0793439A1 (fr) 1997-09-10
EP0793439B1 true EP0793439B1 (fr) 2000-01-26

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ID=10764569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95940999A Revoked EP0793439B1 (fr) 1994-11-24 1995-11-21 Procede de lavage industriel de vaisselle sans agent de blanchiment

Country Status (10)

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

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
CA2220312C (fr) * 1997-11-10 1999-11-09 Murugesu Nandhakumaran Recepteur radio et reemetteur
DE10053416A1 (de) 2000-10-27 2002-05-08 Bsh Bosch Siemens Hausgeraete Verfahren zum maschinellen Reinigen von Textilien oder festen Gegenständen
GB0111618D0 (en) * 2001-05-14 2001-07-04 Procter & Gamble Dishwashing
ES2290211T3 (es) * 2002-03-18 2008-02-16 CHEMISCHE FABRIK DR. WEIGERT GMBH & CO. KG. Procedimiento para la limpieza de la vajilla.
EP1657297B1 (fr) * 2004-11-15 2009-07-22 Chemische Fabrik Dr. Weigert GmbH & Co. KG. Procédé pour le nettoyage de la vaisselle
MX2007013748A (es) * 2005-05-04 2008-01-28 Johnson Diversey Inc Sistema de lavado de loza que contiene bajos niveles de tensoactivo.
EP2014757A1 (fr) 2007-07-05 2009-01-14 JohnsonDiversey, Inc. Produit de rinçage
JP2012510342A (ja) 2008-12-02 2012-05-10 ディバーシー・インコーポレーテッド カチオン性澱粉を含有する器物洗浄システム
US20120318303A1 (en) * 2011-06-14 2012-12-20 Ecolab Usa Inc. Non-bleaching procedure for the removal of tea and coffee stains
EP3741283A1 (fr) * 2019-05-22 2020-11-25 The Procter & Gamble Company Procédé de lavage automatique de la vaisselle
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
WO2022031312A1 (fr) * 2020-08-04 2022-02-10 The Procter & Gamble Company Procédé de lavage automatique de la vaisselle et bloc

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282214A1 (fr) * 1987-03-07 1988-09-14 Diversey Corporation Procédé de lavage de vaiselle
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 (fr) * 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
TR28788A (tr) * 1993-05-25 1997-03-25 Henkel Ecolab Gmbh & Co Ohg Makinayla bulasik temizlemege mahsus usul ve tertibat.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282214A1 (fr) * 1987-03-07 1988-09-14 Diversey Corporation Procédé de lavage de vaiselle
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 Publication date
WO1996015710A1 (fr) 1996-05-30
AU4255096A (en) 1996-06-17
JPH10509990A (ja) 1998-09-29
DE69514824T2 (de) 2000-06-15
AU713330B2 (en) 1999-12-02
CA2202162A1 (fr) 1996-05-30
DE69514824D1 (de) 2000-03-02
GB9423234D0 (en) 1995-01-04
EP0793439A1 (fr) 1997-09-10
BR9509918A (pt) 1997-09-30
ZA959924B (en) 1997-05-22
ES2142504T3 (es) 2000-04-16

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