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
  • 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
  • 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
  • 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 method for cleaning dishes.
• tableware includes all used in the kitchen area Objects accessible for machine cleaning are, including pots, trays, pans, frying and Baking trays, etc.
• these dishes are made with an alkaline Sprayed cleaner solution.
• the cleaning solution is ready to use Solution, usually from a liquid Cleaner concentrate or a solid (especially powder) formulated cleaner is made with water. It can be normal tap water (city water), act softened or demineralized water.
• the spraying according to the invention is preferably a fine mist-like spray that covers the surface of the dishes with the detergent solution, without mechanical (in the form of hard water jets) on this surface act.
• the spraying should therefore have a chemical effect the cleaning solution and thus soaking the contaminants enable.
• this spraying with large amounts of detergent solution and to carry out so-called hard spray jets, especially when if the alkaline detergent solution in a tank of a dishwasher is constantly circulated.
• the main cleaning is carried out according to the invention with an enzymatic Cleaning solution.
• This contains enzymes as cleaning-active Active substances, preferably proteolytic enzymes such as, for example Amylases or proteases.
• the invention is based on the surprising finding that the combination of a highly alkaline pre-cleaning with a enzymatic main cleaning for a good and quick removal even stubborn contaminants such as burnt food remains.
• the pH of the alkaline cleaning solution is preferred at least 10.5, more preferably at least 11.
• the preferred fine spraying with appropriately finely distributed According to the invention, droplets can be obtained with relatively small amounts Quantities of alkaline cleaning solution are carried out per unit of time.
• the amounts of cleaning solution sprayed in this way between 0.3 and 20 l / min, preferably 0.5 to 10 l / min, more preferably 1 to 5 l / min detergent solution.
• the sprayed detergent solution amounts are usually at a few hundred l / min, typical are, for example, 300 to 400 l / min.
• the alkaline detergent solution works preferably between 5 and 600 s, more preferably 10 and 300 s, more preferably 30 and 300 s, particularly preferably 60 to 180 s on the Dishes. This action can be continued Spraying the dishes (either with a fog-like spray or hard spray jets) happen. Is preferred it, however, after completely wetting the surface of the Tableware to provide an exposure time in which no further targeted and deliberate spraying of dishes with alkaline Detergent solution takes place.
• the alkaline concentration in the alkaline cleaning solution is (calculated as potassium hydroxide) preferably 0.1 to 10 % By weight, preferably 0.1 to 5% by weight, more preferably 0.1 to 3% by weight, more preferably 0.2 to 2% by weight.
• the method according to the invention can be used in so-called one-tank systems can also be carried out in multi-tank dishwashers.
• In-tank dishwashers the dishes remain stationary in the Dishwasher and the various washing and cleaning steps are carried out sequentially.
• a one-tank dishwasher is therefore when applied without further spraying the corresponding nozzle system is completely switched off. It is particularly advantageous for a single-tank machine for spraying the alkaline cleaning solution anyway to use existing nozzle system that for applying the Rinse aid and / or rinse water is used.
• a customary one-tank dishwasher can be used without this being converted or expanded would have to be with a separate nozzle system.
• a multi-tank machine passes through the dishes on a transport device (usually a conveyor belt) various so-called Tanks in which all cleaning and rinsing steps (each one per tank) run simultaneously.
• a transport device usually a conveyor belt
• Tanks in which all cleaning and rinsing steps (each one per tank) run simultaneously.
• a corresponding space between two Tanks are provided that the dishes pass through without doing so to be targeted by spray jets.
• spraying for 12 s can follow, for example of an exposure time (without further spraying) of 120 s may be provided.
• a main cleaning follows the spraying according to the invention with an enzymatic cleaning solution.
• This Main cleaning can be done immediately after spraying (and the act) that are still done on the dish surface alkaline cleaning solution is then from washed off with the enzymatic cleaner.
• one Intermediate rinsing may be provided to remove the alkalinity from the dish surface largely eliminate. You work without Intermediate rinse, becomes alkaline adhering to the surface Detergent solution dragged into the main cleaning step, see above that possibly enzymatic cleaner in correspondingly larger amounts must be added to the desired composition the main cleaner solution.
• the enzymatic cleaner used according to a preferred embodiment of the invention a weakly acidic to weakly alkaline pH of in particular 4 to 9, preferably 5 to 9, more preferably 6 to 8. In this pH range, the used Enzymes work best.
• the main enzymatic cleaning preferably takes 1 to 30 minutes, more preferably 2 to 20 minutes, more preferably 5 to 15 minutes.
• the main cleaning temperature is preferred between 30 and 70 ° C, more preferably 40 to 60 ° C. In in this temperature range they are generally heat-unstable Enzymes particularly effective.
• the enzymatic main cleaning solution can preferably contain 0.08 to 2% by weight of surfactants, examples being NC 8 -C 12 alkylpyrrolidones. It can also contain 0.005 to 0.125 Anson units of at least one protease and / or 0.1 to 6 kilo-Novo units of at least one amylase per liter of cleaning solution.
• the desired pH value is set by means of suitable buffer systems such as, for example, the carbonate / bicarbonate buffer system or citric acid / citrate or the like. Possibly.
• solubilizers such as, for example, short-chain sulfonates, sulfates or the like, further surfactants such as, for example, adducts of ethylene oxide and propylene oxide with fatty alcohols, preservatives, hardness dispersants and the like.
• surfactants such as, for example, adducts of ethylene oxide and propylene oxide with fatty alcohols, preservatives, hardness dispersants and the like.
• spraying with is more alkaline Detergent solution and subsequent main cleaning no final list of the process steps.
• pre-rinsing steps for example a so-called pre-cleaning
• a rinse or rinse that with a usual rinse aid solution can happen.
• An alkaline cleaner concentrate is produced according to the following recipe: Sodium hydroxide, 45% 65,00 Potassium hydroxide, 45% 19,00 Sodium hydroxide, solid 10.00 DTMP , Na salt 3.00 PBTC 3.00
• An enzymatic cleaning solution is prepared as follows:
• the alkaline solution is left to act for 120 s without that a further spraying takes place. Subsequently cleaning with a factor of 10 with water dilute enzymatic cleaning solution of Example 2.
• This Detergent solution is in the dishwasher for 10 min continuous spraying and rinsing of the roasting pan. The temperature of the cleaning solution is 60 ° C.
• rinse with a usual rinse aid (duration of rinse aid step 12 s).
• Burnt and crusted food scraps can come on completely removed from the roasting pan.

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• 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)
• Detergent Compositions (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (2)

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Family Applications (1)

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Cited By (3)

Citations (5)

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• 2002
  • 2002-03-18 EP EP02006099A patent/EP1347039B1/fr not_active Expired - Lifetime
  • 2002-03-18 AT AT02006099T patent/ATE369416T1/de not_active IP Right Cessation
  • 2002-03-18 PT PT02006099T patent/PT1347039E/pt unknown
  • 2002-03-18 ES ES02006099T patent/ES2290211T3/es not_active Expired - Lifetime
  • 2002-03-18 DE DE50210636T patent/DE50210636D1/de not_active Expired - Lifetime

Patent Citations (5)

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