• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    A dishwashing detergent detergent is provided comprising: one or more enzymes; Complexing agents in an amount of 1.9 to 19% by weight; nonionic surfactants in an amount of 2 to 10% by weight; Propylene glycol in an amount of 10 to 20 wt .-%, and the remainder water, enzyme stabilizer, solubilizer and optionally dye and / or reducing agent, wherein the cleaning agent contains substantially no phosphorus-containing complexing agent. This cleaning agent is used in a one-step purification step without further pre-cleaning with a separate agent.
    公开号:CH706874B1
    申请号:CH01439/13
    申请日:2013-08-20
    公开日:2017-02-28
    发明作者:Messner Regina；Gregor Golz Dr
    申请人:Witty Gmbh & Co Kg；
    IPC主号:
    专利说明:

    The present invention relates to the field of machine washing of dishes. In particular, the invention relates to an enzymatically acting cleaning agent for machine washing of dishes or dishwashing, which essentially contains no phosphorus-containing complexing agent, and a cleaning method using the same. In particular, the invention relates to the use of the cleaning agents according to the invention in industrial or commercial dishwashing systems.
    Washing items in a commercial dishwasher requires the use of powerful detergents. The use of enzymes makes it easier to remove food residues adhering to the wash ware, which are usually hydrophobic substances and mainly contain protein, starch, fat and cellulose. By using them, harsh chemical agents can be largely dispensed with and both the environment and the items to be washed are protected.
    [0003] High amounts of halogen in the form of halogen-containing bleaches or high amounts of phosphorus in the form of phosphates or other phosphorus-containing substances have proven to be environmentally relevant in the field of cleaning agents. The use of complexing agents containing phosphorus was tolerated for a long time for special cleaning purposes. However, environmental awareness is growing and so cleaning agents that are more environmentally friendly are increasingly required for special cleaning purposes.
    WO 93/21 299 (Procter & Gamble) describes a thixotropic, liquid agent for washing dishes in automatic dishwasher using enzymes. The agent contains 0.001% to 5% detersive enzymes, 0.1% to 10% of a thickener, 0.001% to 10% propylene glycol, 0.01% to 40% surfactant, as well as sufficient pH adjusters, i.a. Borax, the agent being essentially free of chlorine bleach and silicate.
    It has been shown that conventional dishwashing processes with enzyme-containing detergent systems, in particular for commercial systems, usually consist of several washing steps, a separate detergent component being used for each of these washing steps. In this way, the cleaning enzyme can be protected from damaging components during storage. Dispensing with a multi-stage washing process represents a step forward in the field of commercial dishwashing technology using enzyme-containing detergents, because fewer dosing devices are required and the entire process is simplified and more controllable. In addition, it is desirable that the composition of the formulation of a cleaning agent is not only environmentally friendly, but also simple and clear, that is to say made up of as few components as possible. Up to now there are hardly any dishwashing processes, in particular commercial dishwashing processes, in which the items to be washed are treated and cleaned in a single step because it was difficult to formulate an enzyme-containing cleaning agent that meets these and the aforementioned requirements. The extreme pH values previously required for cleaning liquors with strong cleaning power are incompatible with most enzymes. It goes without saying that such a cleaning agent already containing enzyme must be essentially neutral (pH about 7), i.e. at a pH of 6-8. But that requires careful formulation of all components, taking numerous factors into account, so that a practical enzyme-containing cleaning agent can be provided.
    [0006] The object of the present invention is therefore, inter alia, to provide an environmentally friendly one-step dishwashing process for commercial dishwashers and the associated cleaning agent.
    [0007] The present object was achieved by the cleaning agent according to claim 1 and the method according to claim 11. Preferred embodiments are described in the dependent claims.
    [0008] The present invention therefore relates to a cleaning agent for dishwasher systems, comprising:one or more enzymes;Complexing agents in an amount of 1.9 to 19% by weight;nonionic surfactants in an amount of 2 to 10% by weight;Propylene glycol in an amount of 10 to 20% by weight, andthe remainder is water, enzyme stabilizer, solubilizer and optionally dye and / or reducing agent, the cleaning agent containing essentially phosphorus-free complexing agents.
    The present invention also relates to a one-step method for machine cleaning of dishes, especially in commercial dishwashing systems, comprising the steps of a) dosing a cleaning agent as described above into the main cleaning tank of the dishwasher using a dosing device, and b) rinsing the resulting solution onto the Wash ware, the process not being preceded by a pre-cleaning step.
    The cleaning agent according to the invention shows superiority over conventional and known cleaning agents, in particular when used against tea or coffee soiling. In addition, the single-stage dishwashing process achieves considerable economic advantages. In addition, the formulation only requires a few functional components. The cleaning agent according to the invention is neutral, that is to say has a pH of approx. 6 to less than 9, preferably 7 to 8. It does not contain bleach and is preferably liquid.
    [0011] The components of the cleaning agent according to the invention are explained below.
    Enzymes
    [0012] Enzymes have long been used as washing aids. Enzymes are biocatalysts which hydrolyze organic substances in particular in an environment that is optimal for them and thus make them accessible to a solubilization process. The substance to be hydrolyzed is called a substrate. In the case of dish washing, these are the food residues that adhere to the items to be washed. Food leftovers mainly contain protein, starch and fatty substances. Is e.g. If the vegetable content in the leftovers is high, a cellulose content can also be determined. Special enzymes can be used depending on the substrate. Proteins can be hydrolyzed by protease and thus made easier to detach from the items to be washed and to solubilize them. The primary aim is to remove the adhesion to the wash ware. Starchy food residues can be loosened by amylases and then detached from the dishes. Lipases, which partially hydrolyze the fats and make them more accessible to emulsification, combined with detachment from the items to be washed, are also increasingly being used, particularly in the textile sector. Finally, cellulases can also be used, which in particular hydrolyze cellulose-rich food residues and detach them from the items to be washed. Another effect of the use of these enzymes is that the progressive enzymatic hydrolysis of protein, starch, fat and / or cellulose also leads to a progressive “liquefaction” of the dispersed food residues, which prevents the parts of a dishwasher from accumulating deposits and finally from clogging provided that the enzymes can continue to work.
    In the present invention, proteases, amylase, lipases and cellulases can be used. Proteases and / or amylases are preferably used. A mixture of proteases and amylases is preferred.
    Proteases
    Enzymes that cleave the amide bonds in protein substrates are classified as proteases or (interchangeably) as peptidases. Bacteria of the Bacillus species secrete two extracellular species of protease, a neutral or metalloprotease, and an alkaline protease which is functionally a serine endopeptidase called subtilisin. A serine protease is an enzyme that catalyzes the hydrolysis of peptide bonds and that has an essential serine residue at the active site. The bacterial serine proteases have molecular weights in the range from 20,000 to 45,000. They are inhibited by diisopropyl fluorophosphate, but unlike metalloproteases, they are resistant to ethylenediaminetetraacetic acid (EDTA) (being stabilized by calcium ions at high temperatures). They hydrolyze simple terminal esters and their activity is similar to that of eukaryotic chymotropsin, which is also a serine protease.
    Commercial protease preparations for commercial use are Alcalase <®>, Alcalase <®> Ultra, Bioprase <®> (Nagase Biochemicals), Durazym <®>, Esperase <®>, Everlase <®>, Godo-Bap <® > (Godo Shusei), Liquanase <®>, Liquanase <®> Ultra, Maxacal <®>, Maxapem <®> (Solvay Enzymes), Maxatase <®> (Gist-Brocades), Novozym <®> (Novo Industri A / S), Opticlean <®>, Optimase <®>, Ovozyme <®>, Polazyme <®>, Protosol <®> (Advance Biochemicals), Properase <®>, Properase <®> L, Protease A-01, Protease S -02 (ASA Spezialenzyme GmbH), Purafect <®> (Genencor Int.), Purafect <®> OX, Purafect <®> L, Purafect <®> OX L, Purafect <®> OX P, Savinase <®>, Savinase <®> Ultra, Subtilisin <®> or Wuxi <®> (Wuxi Snyder).
    The amount of proteases used depends on the enzymatic activity. There are different methods of determination that define units of activity / g. These can be converted as follows: 440,000 DU / g (Delft Units) = 1466 GU / g (Glycine Units) = 4 KNPU / g (Kilo Novo Proteinase Units) = 2 AU / g (Anson Units). In the present invention, protease activities of 1 to 50 KNPU-S / g, preferably with 3.2 to 12.8 KNPU-S, more preferably with 4.8 to 11.2 KNPU-S, in particular 6 to 10.4, mainly about 6.4 to 8 KNPU-S per 100 g of finished cleaning agent are used. The enzyme Savinase <®> Ultra 16 L from Novozymes, which has an activity of 16 KNPU-S / g and accordingly in an amount of 0.06 to 3.1, preferably 0.2 to 0.8, more preferably 0, is preferred , 3 to 0.7, in particular 0.38 to 0.65, especially 0.4 to 0.5 g per 100 g of finished cleaning agent, ie Wt .-%, is present.
    Amylases
    Amylases, also known as diastases, are enzymes belonging to the hydrolases that are able to break down starch (amylopectin and amylose) directly or via dextrins to form maltose and glucose. A distinction is made between α-, β- and γ-amylases; the latter two are known collectively as saccharogenic, i.e. saccharifying amylases. The α-amylases, which can be activated by chloride ions, first split starch into larger fragments (dextrins), then into oligosaccharides. They lower the viscosity of a starch solution. An iodine-starch complex is lightened by its effect. Depending on their origin, the α-amylases have different molecular weights (15,000–97,000), pH ranges (3.5–9), optimum temperature (45–90 °), inactivation temperature (60–100 °) and different cleavage products. The technical α-amylases obtained from bacteria, fungi, pancreatic glands and germinated grain (malt) are used industrially in detergents.
    Commercial amylase preparations for commercial use are Amylase FL, Amylase Thermo, Amylase TXL (ASA Spezialenzyme GmbH), BAN <®>, Duramyl <®>, Natalase <®> (Novo Industri A / S), Powerase <®> , Purastar <®> HP Am, Purastar <®> OxAm, Purastar <®> ST 15000L, Purastar <®> ST L, Purastar <®> ST, Stainzyme <®> Plus, Stainzyme <®>, Termamyl <®> or Termamyl <®> Ultra.
    The amount of amylases used depends on the enzymatic activity. There are different methods of determination that define units of activity / g. In the present case, the unit KNU-T is used to evaluate the activity of the amylase used. A KNU (T) is the amount of alpha-amylase which, under standard conditions (pH 7.1, T = 37 ° C), dextrinizes 5.26 g starch dry matter per hour. One KNU (T) corresponds to the amount of alpha-amylase that hydrolyzes 672 micromoles of ethylidene-G7-PNP per minute under standard conditions (pH 7.1, T = 37 ° C). Or 1 KNU (Kilo Novo Unit) is the amount of enzymes which 4870 mg (on a dry basis) of soluble Merck starch (Erg. B 6, lot number 6 380 528) per hour under the standard conditions, pH 5.6, 37 ° C, and Ca2 + concentration 0.0003 M, hydrolyzed. Termamyl® Ultra 300 L from Novozymes A / S, which has an activity of 300 KNU-T / g, is preferably used in the present invention. In the cleaning agent according to the invention, amylase is used in an amount of from 60 to 1200, preferably from 80 to 1000 KNU-T, more preferably from 90 to 900, in particular from 120 to 600 KNU-T per 100 g of finished cleaning agent. Correspondingly, from 0.2 to 4, preferably from 0.27 to 3.3, more preferably from 0.3 to 3, especially from 0.4 to 2 g Termamyl® Ultra 300 L per 100 g of finished cleaning agent, i.e. % By weight, used.
    Enzyme stabilizer
    Boron compounds often serve as enzyme stabilizers. Is known e.g. Formylphenylboronic acid as an enzyme stabilizer. In the present invention, borax is preferably used. Borax, the chemical name is sodium tetraborate decahydrate or disodium tetraborate, Na2B4O7 · 10 xH2O, is a crystalline substance which, with a weakly alkaline reaction, is moderately soluble in cold water, easily soluble in boiling water and insoluble in ethanol. The stability of the enzymatic constituents of detergent formulations, in particular of liquid ones in which the constituents are in close contact with one another, is a major problem in the production of detergent compositions. Borax inhibits the loss of activity of many useful detergent components. For example, proteases in liquid formulations have stability problems due to self-digestion, i. "Cannibalism". This effect can, however, be controlled by using small amounts of borax (<2% by weight). During the washing process, the borax, which forms a protective complex with the enzyme, is released again so that the enzyme can perform its function again. Borate-polyol complexes also serve as enzyme stabilization systems and have been found to be effective in protecting amylases, lipases and cellulases from attack by proteases.
    Instead of borax, other salts can also have a stabilizing or activating effect (e.g. Ca ++ in the case of amylases) for the enzyme. Examples are calcium chloride, sodium calcium formate, calcium lactate, calcium acetate, peptide aldehydes or glucoamides (e.g. fatty acid N-glycosyl-N-methyl-amide).
    In the present invention, 0.1 to 2 wt .-%, preferably 0.2 to 1 wt .-%, particularly preferably 0.3 to 0.5 wt .-% enzyme stabilizer, based on the dry weight, used .
    Complexing agents
    Complexing agents have the task of binding water hardness and, moreover, possibly subgroup metal ions, which have negative effects on other components of the cleaning agent.
    Examples of complexing agents are polyacrylates, zeolites, polyaminocarboxylates such as EDTA, GLDA (L-glutamic acid-N, N-diacetic acid) or MGDA (methylglycinediacetic acid, e.g. Trilon M <®>).
    In the present invention, over other complexing agents, especially GLDA 4Na <+>, i. L-glutamic acid-N, N-diacetic acid tetrasodium salt (Akzo-Nobel) was used. GLDA 4Na <+> is preferably used as a 38% aqueous solution. The trade name is Dissolvine GL-38.
    In the present invention, based on the dry weight, 2 to 15% by weight, more preferably 4 to 12% by weight, particularly preferably 5 to 9% by weight, complexing agents are used.
    Complexing agent and pH regulator
    Complexing agents, which at the same time also represent pH regulators, are e.g. Salts of complexing acids, e.g. of citric acid. In the present invention, trisodium citrate is preferably used in combination with citric acid as a pH-regulating complexing agent. Acetic acid and / or sodium acetate can also be used as pH regulators.
    Trisodium citrate is usually traded as an 87.8% product because it is a dihydrate. Citric acid is mostly obtained as a 50% aqueous solution.
    Based on the dry weight, 1 to 10% by weight, preferably 2 to 8% by weight, more preferably 3 to 7% by weight, in particular 4 to 6% by weight of trisodium citrate are used in the present invention.
    Citric acid is used based on the dry weight in the present invention in an amount of 0.7 to 7 wt .-%, preferably 1 to 5.6 wt .-%, more preferably 1.2 to 4 wt .-%, in particular 1.5 to 2.1 wt% trisodium citrate is used.
    A mixture of trisodium citrate and citric acid in a weight ratio of 5: 1 to 1: 5, preferably 4: 1 to 1: 4, in particular 3: 1 to 1: 3, based on the dry weight, is preferably used.
    Solubilizer
    Solubilizers are used in surfactant formulations, e.g. This cleaning agent is used for substances that are otherwise incompatible with each other. They are also called solubilizers or solubilizers and lower the cloud point.
    The alkali salts of sulfonated aromatics, such as cumene sulfonate or xylene sulfonate, are particularly suitable as solubilizers. The sodium or potassium salt and mixtures thereof are suitable as alkali salts.
    In the present invention, sodium cumene sulfonate is preferably used. A commercial product is, for example, Stepanate <®> SCS-40-E (liquid) or Stepanate <®> SCS-93 (crystalline) or sodium cumene sulfonate (40% dry matter).
    In the present invention, a solubilizer of the form defined above is based in an amount of 2 to 12% by weight, preferably 4 to 10% by weight and particularly preferably in an amount of 3 to 9% by weight based on dry weight.
    Surfactant
    An important effective component of a detergent for dishes is a surfactant. Surfactants lower the surface tension of a liquid or the interfacial tension between two phases and thus enable the formation of dispersions. Therefore, they have the effect that substances which are actually immiscible with one another can be finely mixed and therefore produce the washing effect by dispersing and / or emulsifying the usually hydrophobic food residues in the aqueous washing liquor in the present case.
    There is a large number of very different surfactants. In general, they are divided into ionic, non-ionic and amphoteric surfactants according to their chemical nature. For the present invention, nonionic surfactants are used, especially those from the group of alkoxylated, especially ethoxylated, fatty alcohols. These compounds are usually made by adding an alkylene oxide, such as ethylene oxide or propylene oxide, to the OH group of a fatty alcohol, i. of an alcohol usually having 8 to 22 carbon atoms. In the present invention, fatty alcohol ethoxylates are preferred; Compounds obtained by adding one or more –CH2CH2-O units (either by addition with ethylene oxide or by etherification with glycol) to a fatty alcohol.
    In the present invention, Plurafac <®> types are preferably used, in particular Plurafac <®> LF 120, LF 221, LF 231, LF 303 and / or LF 403.
    Plurafac <®> LF 120 is a fatty alcohol alkoxylate. The product is liquid. The pH value is 6-7 (50 g / l, 23 ° C). The product has a density of 0.99 g / cm 3 and a dynamic viscosity of approx. 45-60 mPas at 23 ° C. The cloud point according to (EN 1890) for method A is approx. 28 ° C, for method D approx. 48 ° C and for method E approx. 43 ° C. The product has a water number of approx. 20 ml. The pour point is approx. 5 ° C. The surface tension is approx. 28 mN / m.
    Plurafac <®> LF 221 is a liquid with a surfactant content of approx. 95% and a water content of approx. 5%. According to DIN EN 1890, the cloud points for method A are approx. 34 °, method B approx. 24 °, method D approx. 48 ° and method E approx. 44 ° C.
    The water number according to DIN EN 12 836 is approx. 17. The pH value is neutral. The density at 23 ° C is 1. The pour point is approx. 5 ° C. The Brookfield viscosity (EN 12 092, Brookfield LVT) is approx. 100 at 23 ° C, approx. 5000 at 10 ° C and> 10 5 at 0 ° C. The wetting effect (according to EN 1772, dist. Water, 2 g sodium carbonate / I) is approx. 75 at 23 ° C with 0.5 g surfactant, approx. 30 at 23 ° C with 1 g surfactant, and approx. 30 at 23 ° C with 2 g surfactant approx. 15, at 70 ° C with 0.5 g surfactant> 300, at 70 ° C with 1 g surfactant> 300, and at 70 ° C with 2 g surfactant approx. 100. The surface tension (according to EN 14 370 , 1 g / l distilled water, 23 ° C) is approx. 30.
    Plurafac <®> LF 231 is a liquid with a surfactant content of 100%. The cloud points according to DIN EN 1890 are approx. 35 ° C for method D and approx. 28 ° C.
    The water number according to EN 12 836 is approx. 12. The pH value is approx. 6. The density at 23 ° C. is approx. 0.96. The pour point is approx. -5 ° C. The Brookfield viscosity (EN 12 092, Brookfield LVT) is approx. 45 at 23 ° C., approx. 100 at 10 ° C. and approx. 400 at 0 ° C. The wetting effect (according to EN 1772, distilled water, 2 g Sodium carbonate / I) is approx. 100 at 23 ° C with 0.5 g surfactant, approx. 40 at 23 ° C with 1 g surfactant, approx. 20 at 23 ° C with 2 g surfactant, at 70 ° C with 0, 5 g surfactant> 300, at 70 ° C with 1 g surfactant> 300, and at 70 ° C with 2 g surfactant> 300. The surface tension (according to EN 14 370, 1 g / l distilled water, 23 ° C) is approx. 29.
    Plurafac <®> LF 303 is a liquid with a pH of approx. 7 (50 g / l, 23 ° C), a solidification point of <-20 ° C and a boiling point of> 149 ° C. The density is about 1 g / cm 3 at 23 ° C. The cloud point according to EN 1890 is approx. 35 ° C for method D and approx. 29 ° C for method E. The product has a water number of approx. 19 ml. The surface tension is approx. 36 mN / m.
    Plurafac <®> LF 403 is a liquid with a pH of approx. 7 (50 g / l, 23 ° C), a solidification point of approx. -25 ° C and a boiling point of> 250 ° C. The density is about 0.94 g / cm 3 at 23 ° C. According to EN 1890, the cloud point for method D is approx. 51 ° C and for method E approx. 41 ° C. The product has a water number of approx. 13 ml. The surface tension is approx. 30 mN / m.
    The cloud point is determined according to DIN EN 1890 as follows:Method A: 1 g surfactant + 100 g dist. waterMethod B: 1 g surfactant + 100 g NaCI solution (c = 50 g / l)Method D: 5 g surfactant + 45 g butyl diglycol solution (c = 250 g / l)Method E: 5 g surfactant + 25 g butyl diglycol solution (c = 250 g / l)
    Ethylan 1005 (Akzo) is a synthetic primary alcohol surfactant, i. Propylheptanol ethoxylate (CAS 160875-66-1). The cloud point (5 g of product in 25 ml of 25% butyl diglycol) is 47-53 ° C (method AB-46-1426). The density is 0.968 g / cm 3 and the pour point -9 ° C. The viscosity at 20 ° C is 30 mPas. The surface tension according to Du Noüy at 25 ° C, 0.1% (DIN 53 914) is 27.0 mN / m.
    Fatty alcohol ethoxylates with a surface tension (EN 14370) measured at 1 g / l distilled water are therefore particularly suitable. Water 23 ° C (corrected according to Harkins-Jordan) from approx. 25 to 32 mN / m, preferably approx. 27 to 30 mN / m.
    In the present invention, a total of 2 to 10% by weight, more preferably 3 to 9% by weight and particularly preferably 4 to 8% by weight of surfactant are used in total. If the surfactant is a mixture of different fatty alcohol ethoxylates, the ratio is 9: 1 to 1: 9 or 1: 5 to 5: 1, preferably 8: 3 to 3: 8, or 3: 4 to 4: 3, particularly preferably 2 : 1 to 1: 2 from the fatty alcohol ethoxylate with the higher cloud point to the fatty alcohol ethoxylate with the lower cloud point. The ratio 2: 1 to 1: 2, especially 2: 1, is particularly preferred.
    Propylene glycol
    Propylene glycol, also known as 1,2-propanediol, is a chiral compound in the form of a clear, colorless liquid, which is usually traded as a racemate. Propylene glycol is miscible with water and ethanol. It is used as a solvent and filler and therefore also has a certain cleaning effect. It can also help stabilize enzyme systems.
    In the present invention, the amount of propylene glycol is 9 to 20% by weight, preferably 15 to 19% by weight.
    Defoamer
    The cleaning agent according to the invention can also contain a defoamer. Examples of such defoamers are e.g. Alkyl polyalkylene glycol ethers, for example Dehydem <®> Supra. The product Dehydem <®> Supra has a cloud point of 20-25 ° C according to DIN-EN 1890 and a pH value in water (10%) of 6.5 to 7.5 ISO 4316. The density is 0.996-0.999 g / cm <3> according to DIN 51757. Ladiper <®> 167 is a liquid preparation of quaternary ammonium compound in fatty alcohol-ethylene glycol-polypropylene glycol ether and water. The boiling range is> 100 ° C, the pour point is -38 ° C. The density is 0.96 g / cm 3 and the pH value (10 g / l at 20 ° C) is approx. 7. The dynamic viscosity at 23 ° C is approx. 60 mPas (DIN 53015) .
    The cleaning agents according to the invention optionally contain a dye. Any non-toxic, water-soluble dyes are suitable. In particular, 312 507 Eurocert Brilliant Blue FCF (Cl No .: 42 090, Cl name: Food Blue 2) is suitable. The color is a solid with about 15% sodium sulfate and is food grade.
    Reducing agents can also be mixed into the cleaning agents according to the invention. For this purpose, e.g. Sodium sulfite. The sodium sulfite preferably has a bulk density of 1.3 to 1.5 kg / dm 3. Alternatives to sodium sulfite are sodium thiosulfate or sodium ascorbate.
    The water used to make up the components to 100% by weight is preferably purified water, in particular softened water.
    The range values of the amounts given above for the respective components can be combined with one another as desired for the composition of a cleaning agent according to the invention, provided that all components of the cleaning agent make up an amount of 100% by weight or less and a desired effect is obtained. All of these combinations are expressly disclosed.
    The term “essentially phosphorus-free” is to be understood in such a way that small amounts of phosphorus-containing substances can be present, but which have no essential function on the so-called cleaning agent component or which represent unavoidable impurities. In the same way e.g. to interpret the term “essentially no phosphorous complexing agents”. This also applies to the other components identified in this way.
    The invention also relates to a single-stage dishwashing process, which is carried out in particular in commercial dishwashing systems, comprising the steps of a) dosing a cleaning agent as described above into the main cleaning tank of the dishwasher using a dosing device, and b) rinsing the resulting solution onto the items to be washed, wherein the process is not preceded by a pre-cleaning step with a separate cleaning agent.
    The method according to the invention is therefore, as far as the number of method steps that take place for supplying cleaning agents or components of such agents in dishwashing is concerned, a one-step method, i.e. there is no upstream pre-cleaning step with a separate cleaning agent. The method enables the dishes to be cleaned quickly and efficiently in a commercial dishwashing system, the duration of a wash cycle (i.e. a sequence of the one-stage washing process) typically being between 1 and 5 minutes and expediently between 2 and 3 minutes. During the washing process, temperatures of 50 ° C. to approx. 95 ° C., typically 60 ° C. to 80 ° C., are maintained in the commercial dishwasher with a water consumption of approx. 150 to approx. 600 l / h (depending on the machine type) l / h or approx. 300 to 500 l / h, in order to guarantee a constant and hygienically perfect wash result over several hours.
    Examples
    The following examples illustrate the invention. All percentages are based on weight, unless otherwise stated.
    Example 1
    A cleaning agent was prepared by mixing in a conventional manner known per se.
    The agent was used in a commercially available commercial dishwasher, it being possible to dispense with a pre-wash process with a separate cleaning agent. The results were outstanding, especially soiling from coffee and tea had been removed much better than in the known way.
    The economic saving effects were also clear.
    Example 2
    In a manner similar to that for Example 1, another cleaning solution was formulated, a defoamer also being used in this case.
    Excellent results similar to those of Example 1 could be achieved. In particular, the removal of tea and coffee stains was excellent.
    In carrying out the invention, it has been shown that, in industrial dishwashing, the preparations according to the invention surprisingly deliver even better washing results than phosphorus-containing cleaning agents with otherwise the same or similar composition.
    权利要求:
    Claims (12)
    [1]
    1. Detergent for dishwashing installations, comprising:one or more enzymes;Complexing agents in an amount of 1.9 to 19% by weight;nonionic surfactants in an amount of 2 to 10% by weight;Propylene glycol in an amount of 10 to 20 wt .-%, andthe remainder being water, enzyme stabilizer, solubilizer and optionally dye and / or reducing agent,characterized in that the complexing agent (s) are phosphorus-free at least except for unavoidable impurities.
    [2]
    2. Cleaning agent according to claim 1, wherein the cleaning agent contains corrosion inhibitors, which are phosphorus-free at least until unavoidable impurities.
    [3]
    3. Cleaning agent according to claim 1 or 2, wherein the cleaning agent contains apart from unavoidable impurities phosphorus-free solubilizers and / or phosphorus-free surfactants.
    [4]
    4. Cleaning agent according to one of the preceding claims, wherein at least one enzyme is a protease and having an activity equivalent to 3.2 to 12.8 KNPU-S is present.
    [5]
    A detergent according to any one of the preceding claims wherein at least one enzyme is an amylase and is present at an activity equivalent to 120 to 600 KNU-T.
    [6]
    6. Cleaning agent according to one of the preceding claims, wherein solubilizer is present in an amount of 1 to 20 wt .-%.
    [7]
    7. Cleaning agent according to one of the preceding claims, wherein the complexing agent from 2 to 15 wt .-%, based on the dry weight, GLDA 4Na + and a mixture of trisodium citrate and citric acid in a weight ratio of 5: 1 to 1: 5, based on the dry weight , consists.
    [8]
    A detergent according to any one of the preceding claims, wherein the nonionic surfactant is a mixture.
    [9]
    9. Cleaning agent according to one of the preceding claims, characterized in that the cleaning agent is substantially free of phosphorus, except for unavoidable impurities.
    [10]
    10. Cleaning agent according to one of the preceding claims, characterized in that it is liquid.
    [11]
    11. A method for machine cleaning of dishes, comprisinga) dosing a detergent according to one of the preceding claims in the main cleaning tank of the dishwashing by means of dosing, andb) rinsing the solution obtained on the dishes,the process being carried out in a one-step rinse cycle without a pre-cleaning step with a separate cleaning agent.
    [12]
    12. A method of machine-cleaning dishes according to claim 11, characterized in that the method is carried out in a commercial dishwasher and the duration of a rinsing passage between 1 and 5 minutes and in particular between 2 and 3 minutes.
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    同族专利:
    公开号 | 公开日
    AT513302A3|2017-12-15|
    DE102012107728A1|2014-02-27|
    CH706874A2|2014-02-28|
    AT513302B1|2017-12-15|
    AT513302A2|2014-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL8202294A|1982-06-07|1984-01-02|Chem Y|LIQUID PHOSPHATE-FREE DETERGENT.|
    US5510048A|1991-05-31|1996-04-23|Colgate Palmolive Co.|Nonaqueous liquid, phosphate-free, improved autoamatic dishwashing composition containing enzymes|
    AU655274B2|1991-05-31|1994-12-15|Colgate-Palmolive Company, The|Nonaqueous liquid, phosphate-free, improved automatic dishwashing composition containing enzymes|
    EP0636170B1|1992-04-13|1997-08-06|The Procter & Gamble Company|Thixotropic liquid automatic dishwashing composition with enzyme|
    US7098175B2|2004-06-08|2006-08-29|Unilever Home & Personal Care Usa Division Of Conopco, Inc.|Aqueous detergent composition containing ethoxylated fatty acid di-ester|
    JP5207162B2|2006-11-22|2013-06-12|ディバーシー株式会社|Neutral liquid detergent composition for automatic dishwashers|
    DE102007039655A1|2007-08-22|2009-02-26|Henkel Ag & Co. Kgaa|cleaning supplies|
    DE102009002095A1|2009-04-01|2010-10-07|Henkel Ag & Co. Kgaa|cleaning supplies|
    DE102012202178A1|2012-02-14|2013-08-14|Henkel Ag & Co. Kgaa|Enzyme-containing detergent with polyhydric alcohols|GB202003424D0|2020-03-10|2020-04-22|Reckitt Benckiser Calgon Bv|Composition for the removal and prevention of deposition of limescale|
    法律状态:
    2014-12-31| PFA| Name/firm changed|Owner name: WITTY GMBH AND CO. KG, DE Free format text: FORMER OWNER: WITTY-CHEMIE GMBH AND CO. KG, DE |
    优先权:
    申请号 | 申请日 | 专利标题
    DE201210107728|DE102012107728A1|2012-08-22|2012-08-22|Cleaning agent useful for dishwashing device, comprises enzyme, phosphorus-free complexing agent, nonionic surfactant, propylene glycol, and remaining amount of water, enzyme stabilizer, solubilizer and optionally dye and/or reducing agent|
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