EP0578666B1 - Process for removing starch-containing impurities from crockery and suitable tenside compositions - Google Patents
Process for removing starch-containing impurities from crockery and suitable tenside compositions Download PDFInfo
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- EP0578666B1 EP0578666B1 EP92907055A EP92907055A EP0578666B1 EP 0578666 B1 EP0578666 B1 EP 0578666B1 EP 92907055 A EP92907055 A EP 92907055A EP 92907055 A EP92907055 A EP 92907055A EP 0578666 B1 EP0578666 B1 EP 0578666B1
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- surfactant solution
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 229920002472 Starch Polymers 0.000 title claims abstract description 12
- 235000019698 starch Nutrition 0.000 title claims abstract description 12
- 239000008107 starch Substances 0.000 title claims abstract description 12
- 239000012535 impurity Substances 0.000 title abstract description 7
- 239000000203 mixture Substances 0.000 title description 6
- 102000013142 Amylases Human genes 0.000 claims abstract description 13
- 108010065511 Amylases Proteins 0.000 claims abstract description 13
- 108091005804 Peptidases Proteins 0.000 claims abstract description 13
- 239000004365 Protease Substances 0.000 claims abstract description 13
- 235000019418 amylase Nutrition 0.000 claims abstract description 13
- 239000000872 buffer Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 9
- -1 C12 alkyl pyrrolidone Chemical compound 0.000 claims abstract description 5
- 102000035195 Peptidases Human genes 0.000 claims abstract description 5
- 239000000654 additive Substances 0.000 claims abstract description 5
- 229940025131 amylases Drugs 0.000 claims abstract description 5
- 239000002270 dispersing agent Substances 0.000 claims abstract description 5
- 239000003755 preservative agent Substances 0.000 claims abstract description 5
- 239000002562 thickening agent Substances 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims abstract 4
- 239000004094 surface-active agent Substances 0.000 claims description 44
- 239000000243 solution Substances 0.000 claims description 34
- 238000002360 preparation method Methods 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000004382 Amylase Substances 0.000 claims description 8
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 claims description 8
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical class CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 7
- 150000002191 fatty alcohols Chemical class 0.000 claims description 7
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 239000003205 fragrance Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000011109 contamination Methods 0.000 claims description 3
- 239000003599 detergent Substances 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- XINQFOMFQFGGCQ-UHFFFAOYSA-L (2-dodecoxy-2-oxoethyl)-[6-[(2-dodecoxy-2-oxoethyl)-dimethylazaniumyl]hexyl]-dimethylazanium;dichloride Chemical compound [Cl-].[Cl-].CCCCCCCCCCCCOC(=O)C[N+](C)(C)CCCCCC[N+](C)(C)CC(=O)OCCCCCCCCCCCC XINQFOMFQFGGCQ-UHFFFAOYSA-L 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 abstract 1
- 239000002304 perfume Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000004851 dishwashing Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 229940088598 enzyme Drugs 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 150000004040 pyrrolidinones Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/58—Heterocyclic compounds
-
- 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
- C11D3/38618—Protease or amylase in liquid compositions only
Definitions
- alkaline detergent formulations which contain oxidizing agents in the form of peroxides or active chlorine compounds in addition to the builder substances usually present.
- the common cleaning agents have in common that they cause a pollution of the wastewater due to their alkaline setting.
- some highly alkaline cleaning solutions are required because the exposure times provided in modern dishwashers are very short. Nevertheless, the quality of cleaning that can be achieved with these cleaning solutions is unsatisfactory; it is possible to remove most of the starch-containing impurities, but often a thin coating of starchy material remains on the dishes, which can no longer be removed by the usual dishwashing with increasing use of the dishes.
- the invention is directed to a method of the type mentioned at the beginning, with which accumulating impurities, in particular starch-containing impurities, can be removed effectively without the formation of the above-mentioned deposits, although a surfactant solution is used, the pH of which is in the weakly acidic to weakly alkaline range lies.
- N-C8 to C12-alkylpyrrolidones contained in the surfactant solutions to be used according to the invention are commercially available compounds which have hitherto been predominantly used as surface-active agents in cosmetic formulations.
- proteases and / or (preferably) amylases to be used according to the invention which can be added individually or in a mixture, are commercially available enzyme systems.
- Short-chain sulfonates or sulfates which are also known compounds, are to be mentioned in particular as solubilizers to be used in the surfactant solutions to be used according to the invention.
- Typical examples of defoamers which may be added to the surfactant preparations of the invention are biodegradable adducts of ethylene oxide and propylene oxide with fatty alcohols with cloud points in water of ⁇ 50 ° C. or of propylene oxide with fatty alcohols.
- Ethylene oxide / propylene oxide adducts with fatty alcohols the commercially available block adducts of 2 to 5 moles of ethylene oxide and 2 to 4 on average, are particularly preferred Represent moles of propylene oxide to 1 mole of fatty alcohols having 12 to 18, in particular 12 to 14, carbon atoms; they can be contained in the surfactant preparations in an amount of 1 to 3% by weight.
- defoamers are commercially available compounds which have a defoaming effect at the normal operating temperatures of a dishwasher (approx. 50 to 60 ° C.); if necessary, the surfactant concentrates can, if necessary, contain further, also conventional defoamers.
- the optimal amount of defoamers to be added depends on the chain length of the N-alkylpyrrolidones; longer chain compounds may require higher levels of defoamers.
- the surfactant solution has a content of N-C8-C12-alkylpyrrolidones in the range from 0.08 to 1.0% by weight.
- the surfactant solution has a protease content in the range from 0.005 to 0.125 Anson units per 1 liter of solution.
- the surfactant solution has an amylase content in the range from 0.15 to 2.0 kilo-novo units per 1 l of solution.
- the surfactant solution has a pH in the range from 6 to 8 set by means of buffer substances; buffer systems suitable for this, e.g. NaHCO3 / Na2CO3, are known to the expert.
- the surfactant solution is left at temperatures in the range from 30 to 60 ° C. for a period in the range from Act on the mechanically pre-cleaned dishes for 10 to 90 s.
- the dishes are cleaned in a manner known per se, e.g. according to the prior art cited above, by conventional cleaning steps including rinsing.
- DE-A-17 20 093 and DE-B-12 85 087 describe processes for cleaning dishes in dishwashers, in which a rinse aid is added to the water during the rinse cycle to remove starch deposits, which contains surfactant and amylase as well as protease.
- WO-A-88/00184 describes low-foaming N-alkyl-substituted pyrrolidones which can be used as surfactants.
- a Winterhalter 2-tank box transport machine of the type WKTS - PWZNT 2600 was used, which was equipped with a spray device for spraying on the aqueous surfactant preparation of the invention in front of the cleaning tank for taking up conventional cleaning agents compatible with the surfactants of the surfactant solution was.
- the water supply was carried out with softened Hamburg city water ( ⁇ 0.1 mmol Ca / l).
- Conventional rinse aid with a concentration of 0.3 g / l was used in the final stage; the type of rinse aid is independent of the result of the desired removal of the starch deposits.
- Ceramic dishes from a canteen with starch deposits covering at least 50% of the surface were used as washware; this wash ware essentially corresponds to that which is obtained after mechanical pre-cleaning of coarse contaminants by spraying with water and whose starch deposits can only be removed effectively with strongly alkaline cleaning agents in accordance with the prior art.
- aqueous surfactant preparation with the following composition was first prepared: 25 g of a commercial block adduct of 5 moles of ethylene oxide and 4 moles of propylene oxide with a technical C12 / C14 fatty alcohol with a cloud point in water of 28-32 ° C (defoamer), 1 g of Nn-octylpyrrolidone, 5 g of a commercially available aqueous solution of a mixture of amylases and proteases with an activity of 1.5 Anson units or 50 kilo-Novo units per liter, 0.4 g sodium bicarbonate and 0.1 g sodium carbonate, supplemented to 100 ml volume with Hamburg city water; this preparation was mixed with a commercially available polyacrylate disperser to a concentration of 100 ppm and had a pH of 7.2 +/- 0.4. Before being loaded into the test dishwasher, this preparation was diluted with water to a total volume ratio of 1000 ml.
- the surfactant solution thus obtained was sprayed onto the warm dishes having a temperature of about 40-45 ° C. in the aforementioned test machine. After an exposure time of 15 s, "normal" rinsing was carried out with a commercially available dishwashing detergent at 60 ° C., followed by a rinse step with a rinse aid which is also customary.
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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)
- Detergent Compositions (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Pyrrole Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Entfernen von insbesondere stärkehaltigen Verunreinigungen von Geschirr in Geschirrspülmaschinen mit den Schritten:
- a) mechanische Vorreinigung des Geschirrs von groben Verunreinigungen,
- b) Besprühen des Geschirrs mit einer Tensidlösung,
- c) Einwirkenlassen der Tensidlösung bei Temperaturen im Bereich zwischen der Umgebungstemperatur und etwa 60°C für eine im Bereich von 5 bis 300 s liegende Zeitspanne,
- d) maschinelle Reinigung des Geschirrs mit üblichen, mit den Tensiden der Tensidlösung verträglichen Reinigungsmitteln
- e) Klarspülen.
- a) mechanical pre-cleaning of the dishes from coarse dirt,
- b) spraying the dishes with a surfactant solution,
- c) allowing the surfactant solution to act at temperatures in the range between the ambient temperature and about 60 ° C. for a time period in the range from 5 to 300 s,
- d) mechanical cleaning of the dishes with customary cleaning agents compatible with the surfactants of the surfactant solution
- e) Rinse aid.
Im Bereich der lebensmittelverarbeitenden Industrie einschließlich des Küchenbereichs werden für die maschinelle Geschirreinigung mehr oder minder alkalische Reinigungsmittelformulierungen eingesetzt, die zusätzlich zu üblicherweise vorhandenen Buildersubstanzen Oxidationsmittel in Form von Peroxiden oder Aktivchlorverbindungen enthalten. Den bekannten Reinigungsmitteln ist gemeinsam, daß sie infolge ihrer alkalischen Einstellung eine Belastung des Abwassers bedingen. Speziell bei der Reinigung von Geschirr mit stärkehaltigen Verunreinigungen werden jedoch z.T. hochalkalische Reinigerlösungen benötigt, da die in modernen Geschirrspülmaschinen vorgesehenen Einwirkzeiten sehr kurz bemessen sind. Dennoch ist die mit diesen Reinigerlösungen erzielbare Qualität der Reinigung unbefriedigend; es gelingt zwar, den größten Teil der stärkehaltigen Verunreinigungen zu entfernen, es bleibt jedoch häufig auf dem Geschirr ein dünner Belag aus stärkehaltigem Material, der sich mit steigender Gebrauchsdauer des Geschirrs im Wege der üblichen Geschirreinigung nicht mehr entfernen läßt. Dies gilt auch für diejenigen Verfahren, bei denen das vorgereinigte Geschirr direkt mit relativ hoch dosierten alkalischen Reinigern besprüht wird, woran sich eine Einwirkzeit anschließt, die mehrere Sekunden bis mehrere Minuten betragen kann. Zudem bedingt das Vorhandensein konzentrierter alkalischer Lösungen in hierfür vorgesehenen Geschirrspülmaschinen ein nicht unerhebliches Gefahrenpotential für das Bedienungspersonal.In the area of the food processing industry including the kitchen area are for the mechanical Dishwashing more or less alkaline detergent formulations are used, which contain oxidizing agents in the form of peroxides or active chlorine compounds in addition to the builder substances usually present. The common cleaning agents have in common that they cause a pollution of the wastewater due to their alkaline setting. Especially when cleaning dishes with starchy impurities, however, some highly alkaline cleaning solutions are required because the exposure times provided in modern dishwashers are very short. Nevertheless, the quality of cleaning that can be achieved with these cleaning solutions is unsatisfactory; it is possible to remove most of the starch-containing impurities, but often a thin coating of starchy material remains on the dishes, which can no longer be removed by the usual dishwashing with increasing use of the dishes. This also applies to those processes in which the pre-cleaned dishes are sprayed directly with relatively high-dose alkaline cleaners, which is followed by an exposure time that can be from several seconds to several minutes. In addition, the presence of concentrated alkaline solutions in the dishwashers provided therefor poses a not inconsiderable risk potential for the operating personnel.
Demgemäß ist die Erfindung auf ein Verfahren der eingangs genannten Art gerichtet, mit dem sich im Küchenbetrieb anfallende, insbesondere stärkehaltige Verunreinigungen wirkungsvoll ohne Ausbildung der vorstehend genannten Beläge entfernen lassen, obwohl dabei eine Tensidlösung zur Anwendung kommt, deren pH-Wert im schwachsauren bis schwachalkalischen Bereich liegt.Accordingly, the invention is directed to a method of the type mentioned at the beginning, with which accumulating impurities, in particular starch-containing impurities, can be removed effectively without the formation of the above-mentioned deposits, although a surfactant solution is used, the pH of which is in the weakly acidic to weakly alkaline range lies.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß man als Tensidlösung eine wäßrige Lösung verwendet, die
- f) 0,08 bis 2,0 Gew.-% N-C₈- bis C₁₂-Alkylpyrrolidone,
- g) 0,005 bis 0,125 Anson-Einheiten einer Protease oder mehrerer und/oder 0,1 bis 6 Kilo-Novoeinheiten einer Amylase oder mehrerer pro 1 l Tensidlösung,
- h) im pH-Bereich von 5 bis 9 wirkende Puffersubstanzen und
- i) übliche Lösevermittler,
- k) übliche Zusätze, wie Entschäumer, Duftstoffe, Farbstoffe, Verdickungsmittel, Konservierungsmittel und Härtedispergatoren, enthält.
- f) 0.08 to 2.0% by weight of N-C₈- to C₁₂-alkylpyrrolidones,
- g) 0.005 to 0.125 Anson units of a protease or more and / or 0.1 to 6 kilo-Novo units of an amylase or more per 1 l of surfactant solution,
- h) in the pH range from 5 to 9 acting buffer substances and
- i) usual solvency mediators,
- k) usual additives, such as defoamers, fragrances, dyes, thickeners, preservatives and hardness dispersants.
Die in den erfindungsgemäß zu verwendenden Tensidlösungen enthaltenen N-C₈ bis C₁₂-Alkylpyrrolidone, insbesondere solche mit geradkettigen Alkylgruppen, sind handelsübliche Verbindungen, die bisher überwiegend als oberflächenaktive Mittel in kosmetischen Formulierungen eingesetzt wurden.The N-C₈ to C₁₂-alkylpyrrolidones contained in the surfactant solutions to be used according to the invention, in particular those with straight-chain alkyl groups, are commercially available compounds which have hitherto been predominantly used as surface-active agents in cosmetic formulations.
Die erfindungsgemäß einzusetzenden Proteasen und/oder (bevorzugt) Amylasen, die einzeln oder in Mischung zugesetzt werden können, sind handelsübliche Enzymsysteme.The proteases and / or (preferably) amylases to be used according to the invention, which can be added individually or in a mixture, are commercially available enzyme systems.
Als in den erfindungsgemäß zu verwendenden Tensidlösungen einzusetzende Lösevermittler sind insbesondere kurzkettige Sulfonate bzw. Sulfate zu nennen, die ebenfalls bekannte Verbindungen sind.Short-chain sulfonates or sulfates, which are also known compounds, are to be mentioned in particular as solubilizers to be used in the surfactant solutions to be used according to the invention.
Typische Beispiele für gegebenenfalls den Tensidzubereitungen der Erfindung zuzusetzende Entschäumer sind biologisch abbaubare Addukte von Ethylenoxid und Propylenoxid an Fettalkohole mit Trübungspunkten in Wasser von ≦ 50°C oder von Propylenoxid an Fettalkohole. Besonders bevorzugt sind Ethylenoxid/Propylenoxid-Addukte an Fettalkohole, die handelsübliche Blockaddukte von im Zahlenmittel 2 bis 5 Mol Ethylenoxid und 2 bis 4 Mol Propylenoxid an 1 Mol Fettalkohole mit 12 bis 18, insbesondere 12 bis 14 Kohlenstoffatomen darstellen; sie können in den Tensidzubereitungen in einer Menge von 1 bis 3 Gew.-% enthalten sein. Die vorgenannten Entschäumer sind handelsübliche Verbindungen, die bei den normalen Betriebstemperaturen einer Geschirrspülmaschine (ca. 50 bis 60°C) entschäumend wirken; gegebenenfalls können die Tensidkonzentrate, falls erforderlich, weitere, ebenfalls übliche Entschäumer enthalten. Die optimale Menge der zuzusetzenden Entschäumer ist abhängig von der Kettenlänge der N-Alkylpyrrolidone; längerkettige Verbindungen können höhere Anteile an den Entschäumern erfordern.Typical examples of defoamers which may be added to the surfactant preparations of the invention are biodegradable adducts of ethylene oxide and propylene oxide with fatty alcohols with cloud points in water of ≦ 50 ° C. or of propylene oxide with fatty alcohols. Ethylene oxide / propylene oxide adducts with fatty alcohols, the commercially available block adducts of 2 to 5 moles of ethylene oxide and 2 to 4 on average, are particularly preferred Represent moles of propylene oxide to 1 mole of fatty alcohols having 12 to 18, in particular 12 to 14, carbon atoms; they can be contained in the surfactant preparations in an amount of 1 to 3% by weight. The above-mentioned defoamers are commercially available compounds which have a defoaming effect at the normal operating temperatures of a dishwasher (approx. 50 to 60 ° C.); if necessary, the surfactant concentrates can, if necessary, contain further, also conventional defoamers. The optimal amount of defoamers to be added depends on the chain length of the N-alkylpyrrolidones; longer chain compounds may require higher levels of defoamers.
Gemäß einer bevorzugten Ausführungsform der Erfindung weist die Tensidlösung einen Gehalt an N-C₈-C₁₂-Alkylpyrrolidonen im Bereich von 0,08 bis 1,0 Gew.-% auf.According to a preferred embodiment of the invention, the surfactant solution has a content of N-C₈-C₁₂-alkylpyrrolidones in the range from 0.08 to 1.0% by weight.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung weist die Tensidlösung einen Gehalt an Proteasen im Bereich von 0,005 bis 0,125 Anson-Einheiten pro 1 l Lösung auf.According to a further advantageous embodiment of the invention, the surfactant solution has a protease content in the range from 0.005 to 0.125 Anson units per 1 liter of solution.
Gemäß einer weiteren, besonders vorteilhaften Ausführungsform der Erfindung weist die Tensidlösung einen Gehalt an Amylasen im Bereich von 0,15 bis 2,0 Kilo-Novoeinheiten pro 1 l Lösung auf.According to a further, particularly advantageous embodiment of the invention, the surfactant solution has an amylase content in the range from 0.15 to 2.0 kilo-novo units per 1 l of solution.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung weist die Tensidlösung einen mittels Puffersubstanzen eingestellten pH-Wert im Bereich von 6 bis 8 auf; hierfür geeignete Puffersysteme, z.B. NaHCO₃/Na₂CO₃, sind dem Fachmann geläufig.According to a further advantageous embodiment of the invention, the surfactant solution has a pH in the range from 6 to 8 set by means of buffer substances; buffer systems suitable for this, e.g. NaHCO₃ / Na₂CO₃, are known to the expert.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung läßt man die Tensidlösung bei Temperaturen im Bereich von 30 bis 60°C für eine Zeitspanne im Bereich von 10 bis 90 s auf das mechanisch vorgereinigte Geschirr einwirken.According to a further advantageous embodiment of the invention, the surfactant solution is left at temperatures in the range from 30 to 60 ° C. for a period in the range from Act on the mechanically pre-cleaned dishes for 10 to 90 s.
Im Anschluß an den erfindungsgemäßen Einsatz der schwachsauren bis schwachalkalischen Tensidlösungen erfolgt die Endreinigung des Geschirrs in an sich bekannter Weise, z.B. gemäß dem vorstehend zitiertem Stand der Technik, durch übliche Reinigungsschritte einschließlich des Klarspülens.Following the use of the weakly acidic to weakly alkaline surfactant solutions according to the invention, the dishes are cleaned in a manner known per se, e.g. according to the prior art cited above, by conventional cleaning steps including rinsing.
Im übrigen ist es nicht erforderlich, die Stufen der mechanischen Vorreinigung und gegebenenfalls auch des Aufsprühens der erfindungsgemäß einzusetzenden Tensidlösungen sowie des Einwirkens derselben in derselben Maschine vorzunehmen; es ist möglich, diese Schritte in vor der eigentlichen Geschirrspülmaschine vorgesehenen Arbeitsstationen durchzuführen.Moreover, it is not necessary to carry out the steps of mechanical pre-cleaning and, if appropriate, also spraying on the surfactant solutions to be used according to the invention and the action of the same in the same machine; it is possible to carry out these steps in work stations provided in front of the actual dishwasher.
Die Erfindung betrifft weiterhin eine wäßrige Tensidzubereitung, enthaltend
- a) 0,08 bis 2,0 Gew.-% N-C₈- bis C-₁₂- Alkylpyrrolidone,
- b) 0,005 bis 0,125 Anson-Einheiten einer Protease oder mehrerer und/oder 0,1 bis 6 Kilo-Novoeinheiten einer Amylase oder mehrerer pro 1 l Zubereitung
- c) im pH-Bereich von 5 bis 9 wirkende Puffersubstanzen
- d) übliche Lösevermittler
sowie gegebenenfalls - e) übliche Zusätze, wie Entschäumer, Duftstoffe, Farbstoffe, Verdikkungsmittel, Konservierungsmittel und Härtedispergatoren.
- a) 0.08 to 2.0% by weight of N-C₈- to C-₁₂- alkyl pyrrolidones,
- b) 0.005 to 0.125 Anson units of a protease or more and / or 0.1 to 6 kilo-Novo units of an amylase or more per 1 liter of preparation
- c) buffer substances acting in the pH range from 5 to 9
- d) usual brokers
and if necessary - e) usual additives, such as defoamers, fragrances, dyes, thickeners, preservatives and hardness dispersants.
Weitere vorteilhafte Ausgestaltungen der wäßrigen Tensidzubereitung der Erfindung ergeben sich aus den weiter oben erläuterten Merkmalen bezüglich des Verfahrens, in dem sie angewendet werden.Further advantageous refinements of the aqueous surfactant preparation of the invention result from the features explained above with regard to the method in which they are used.
In DE-A-17 20 093 und DE-B-12 85 087 werden Verfahren zur Reinigung von Geschirr in Geschirrspülmaschinen beschrieben, bei denen dem Wasser beim Klarspülgang zur Entfernung von Stärkebelegen ein Klarspülmittel zugesetzt wird, das außer Tensid und Amylase auch Protease enthält.DE-A-17 20 093 and DE-B-12 85 087 describe processes for cleaning dishes in dishwashers, in which a rinse aid is added to the water during the rinse cycle to remove starch deposits, which contains surfactant and amylase as well as protease.
In WO-A-88/00184 werden schwach schäumende N-alkylsubstituierte Pyrrolidone beschrieben, die als Tenside eingesetzt werden können.WO-A-88/00184 describes low-foaming N-alkyl-substituted pyrrolidones which can be used as surfactants.
Die Erfindung wird im folgenden anhand eines bevorzugten Ausführungsbeispiels näher erläutert.The invention is explained in more detail below with the aid of a preferred exemplary embodiment.
Für die Durchführung des Verfahrens der Erfindung wurde eine Winterhalter 2-Tank-Kastentransportmaschine vom Typ WKTS - PWZNT 2600 verwendet, die vor dem Reinigungstank für die Aufnahme üblicher, mit den Tensiden der Tensidlösung verträglichen Reinigungsmitteln mit einer Sprühvorrichtung zum Aufsprühen der wäßrigen Tensidzubereitung der Erfindung ausgerüstet war. Die Wasserversorgung erfolgte mit enthärtetem Hamburger Stadtwasser (< 0,1 mmol Ca/l). In der Endstufe wurden übliche Klarspüler mit einer Konzentration von 0,3 g/l verwendet; die Art der Klarspüler ist unabhängig von dem Ergebnis der angestrebten Entfernung der Stärkebeläge.For the implementation of the method of the invention, a Winterhalter 2-tank box transport machine of the type WKTS - PWZNT 2600 was used, which was equipped with a spray device for spraying on the aqueous surfactant preparation of the invention in front of the cleaning tank for taking up conventional cleaning agents compatible with the surfactants of the surfactant solution was. The water supply was carried out with softened Hamburg city water (<0.1 mmol Ca / l). Conventional rinse aid with a concentration of 0.3 g / l was used in the final stage; the type of rinse aid is independent of the result of the desired removal of the starch deposits.
Als Spülgut wurde ein aus einer Kantine stammendes Keramikgeschirr mit Stärkebelägen, die mindestens 50 % der Oberfläche bedeckten, verwendet; dieses Spülgut entspricht im wesentlichen demjenigen, das nach mechanischer Vorreinigung von groben Verunreinigungen durch Abspritzen mit Wasser erhalten wird und dessen Stärkebeläge entsprechend dem Stand der Technik wirksam nur mit stark alkalischen Reinigungsmitteln entfernbar sind.Ceramic dishes from a canteen with starch deposits covering at least 50% of the surface were used as washware; this wash ware essentially corresponds to that which is obtained after mechanical pre-cleaning of coarse contaminants by spraying with water and whose starch deposits can only be removed effectively with strongly alkaline cleaning agents in accordance with the prior art.
Es wurde zunächst eine wäßrige Tensidzubereitung mit der folgenden Zusammensetzung bereitet:
25 g eines handelsüblichen Blockadduktes von 5 Mol Ethylenoxid und 4 Mol Propylenoxid an einen technischen C12/C14-Fettalkohol mit einem Trübungspunkt in Wasser von 28 - 32°C (Entschäumer),
1 g N-n-Octylpyrrolidon,
5 g einer handelsüblichen wäßrigen Lösung eines Gemisches von Amylasen und Proteasen mit einer Aktivität von 1,5 Anson-Einheiten bzw. 50 Kilo-Novoeinheiten pro Liter,
0,4 g Natriumbicarbonat und
0,1 g Natriumcarbonat,
ergänzt auf 100 ml Volumen mit Hamburger Stadtwasser; diese Zubereitung wurde mit einem handelsüblichen Polyacrylatdispergator bis zu einer Konzentration von 100 ppm versetzt und wies einen pH-Wert von 7,2 +/- 0,4 auf. Vor der Beschickung in die Versuchsspülmaschine wurde diese Zubereitung mit Wasser auf ein Gesamtvolumenverhältnis von 1000 ml verdünnt.An aqueous surfactant preparation with the following composition was first prepared:
25 g of a commercial block adduct of 5 moles of ethylene oxide and 4 moles of propylene oxide with a technical C12 / C14 fatty alcohol with a cloud point in water of 28-32 ° C (defoamer),
1 g of Nn-octylpyrrolidone,
5 g of a commercially available aqueous solution of a mixture of amylases and proteases with an activity of 1.5 Anson units or 50 kilo-Novo units per liter,
0.4 g sodium bicarbonate and
0.1 g sodium carbonate,
supplemented to 100 ml volume with Hamburg city water; this preparation was mixed with a commercially available polyacrylate disperser to a concentration of 100 ppm and had a pH of 7.2 +/- 0.4. Before being loaded into the test dishwasher, this preparation was diluted with water to a total volume ratio of 1000 ml.
Die so erhaltene Tensidlösung wurde in der vorgenannten Versuchsmaschine auf das eine Temperatur von ca. 40 - 45 °C aufweisende warme Geschirr gesprüht. Nach einer Einwirkzeit von 15 s erfolgte ein "normales" Spülen mit einem handelsüblichen Geschirrspülmittel bei 60 °C, gefolgt von einem Klarspülschritt mit einem ebenfalls üblichen Klarspülmittel.The surfactant solution thus obtained was sprayed onto the warm dishes having a temperature of about 40-45 ° C. in the aforementioned test machine. After an exposure time of 15 s, "normal" rinsing was carried out with a commercially available dishwashing detergent at 60 ° C., followed by a rinse step with a rinse aid which is also customary.
Die Untersuchung des so behandelten Geschirrs nach Stärkebelegen mittels einer 0,5 %-igen Jodlösung ergab, daß die Stärkebelege vollständig entfernt worden waren.Examination of the dishes treated in this way after starch covers using a 0.5% iodine solution showed that the starch covers had been completely removed.
Claims (12)
- Process for removing, in particular, starch-containing contamination from dishes in dishwashers comprising the steps of:a) mechanical precleaning of the dishes to remove coarse contamination,b) spraying of the dishes with a surfactant solution,c) leaving the surfactant solution to act at temperatures in the range between ambient temperature and about 60°C for a period of time in the range from 5 to 300 seconds,d) mechanical cleaning of the dishes with customary detergents which are compatible with the surfactants of the surfactant solution ande) rinsing clean,characterised in that the surfactant solution used is an aqueous solution which containsf) 0.08 to 2.0% by weight of N-C₈- to C₁₂-alkylpyrrolidones,g) 0.005 to 0.125 Anson unit of one protease or more and/or 0.1 to 6 kilo-Novo units of one amylase or more per 1 l of solution,h) buffer substances which act in the pH range from 5 to 9 andi) customary solubilising agents, and if appropriatek) customary additives, such as foam suppressants, fragrances, dyestuffs, thickeners, preservatives and hardness-dispersing agents.
- Process according to Claim 1, characterised in that ethylene oxide/propylene oxide adducts on fatty alcohols which are block adducts of 2 to 5 mol of ethylene oxide and 2 to 4 mol of propylene oxide on 1 mol of fatty alcohols having 12 to 18, in particular 12 to 14, carbon atoms are used as the foam suppressants.
- Process according to Claim 1 or 2, characterised in that the surfactant solution has a content of N-C₈-C₁₂-alkylpyrrolidones in the range from 0.08 to 1.0% by weight.
- Process according to at least one of Claims 1 to 3, characterised in that the surfactant solution has a content of proteases in the range from 0.005 to 0.125 Anson unit per l of solution.
- Process according to at least one of Claims 1 to 3, characterised in that the surfactant solution has a content of amylases in the range from 0.15 to 2 kilo-Novo units per l of solution.
- Process according to one of Claims 1 to 5, characterised in that the surfactant solution has a pH, adjusted by means of buffer substances, in the range from 6 to 8.
- Process according to one of Claims 1 to 6, characterised in that the surfactant solution is allowed to act at temperatures in the range from 30 to 60°C for a period of time in the range from 10 to 90 s.
- Aqueous surfactant preparation, containing,a) 0.08 to 2.0% by weight of N-C₈- to C₁₂-alkylpyrrolidones,b) 0.005 to 0.125 Anson units of one protease or more and/or 0.1 to 6 kilo-Novo units of one amylase or more per 1 l of the preparationc) buffer substances which act in the pH range from 5 to 9,d) customary solubilising agents and if appropriatee) customary additives, such as foam suppressants, fragrances, dyestuffs, thickeners, preservatives and hardness-dispersing agents.
- Aqueous surfactant preparation according to Claim 8, characterised in that it has a content of N-C₈-C₁₂-alkylpyrrolidones in the range from 0.08 to 1.0% by weight.
- Aqueous surfactant preparation according to Claim 8 or 9, characterised in that it has a content of proteases in the range from 0.005 to 0.125 Anson unit per 1 l of the preparation.
- Aqueous surfactant preparation according to at least one of Claims 1 to 10, characterized in that it has a content of amylases in the range from 0.15 to 2 kilo-Novo units per l of the preparation.
- Aqueous surfactant preparation according to at least one of Claims 8 to 11, characterized in that it has a pH, adjusted by means of buffer substances, in the range from 6 to 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4110764 | 1991-04-03 | ||
| DE4110764A DE4110764A1 (en) | 1991-04-03 | 1991-04-03 | METHOD FOR REMOVING STRENGTHY IMPURITIES FROM DISHWARE AND SUITABLE SURFACTANT CONCENTRATES FOR THIS |
| PCT/EP1992/000700 WO1992017564A1 (en) | 1991-04-03 | 1992-03-30 | Process for removing starch-containing impurities from crockery and suitable tenside concentrates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0578666A1 EP0578666A1 (en) | 1994-01-19 |
| EP0578666B1 true EP0578666B1 (en) | 1995-02-08 |
Family
ID=6428728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92907055A Expired - Lifetime EP0578666B1 (en) | 1991-04-03 | 1992-03-30 | Process for removing starch-containing impurities from crockery and suitable tenside compositions |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US5399284A (en) |
| EP (1) | EP0578666B1 (en) |
| JP (1) | JPH06510802A (en) |
| AT (1) | ATE118241T1 (en) |
| AU (1) | AU655010B2 (en) |
| CA (1) | CA2107561C (en) |
| CZ (1) | CZ284126B6 (en) |
| DE (2) | DE4110764A1 (en) |
| DK (1) | DK0578666T3 (en) |
| ES (1) | ES2070636T3 (en) |
| GR (1) | GR3015871T3 (en) |
| HU (1) | HU212181B (en) |
| IL (1) | IL101414A (en) |
| RU (1) | RU2099402C1 (en) |
| WO (1) | WO1992017564A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0700265B1 (en) * | 1993-05-25 | 1997-07-30 | Henkel-Ecolab GmbH & Co. OHG | Machine dish-washing process and device |
| EP2924101A1 (en) | 2014-03-24 | 2015-09-30 | Chemische Fabrik Dr. Weigert GmbH & Co KG | Cleaning agent and method for cleaning dishes |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4324106C1 (en) * | 1993-05-25 | 1994-09-15 | Henkel Ecolab Gmbh & Co Ohg | Method and device for the metered addition of active ingredients to a rinsing machine |
| DE19618725A1 (en) * | 1996-05-09 | 1997-11-13 | Weigert Chem Fab | Method and kit for cleaning dishes |
| WO1997049790A1 (en) * | 1996-06-26 | 1997-12-31 | Church & Dwight Company, Inc. | Aqueous cleaning composition for removing flux and method of use |
| JP2000516662A (en) * | 1996-08-19 | 2000-12-12 | ザ、プロクター、エンド、ギャンブル、カンパニー | Automatic dishwashing detergent containing β-ketoester profragrance |
| DE19847498C2 (en) * | 1998-10-15 | 2002-05-08 | Braun Medical Ag Emmenbruecke | Detergents and their use |
| US6835703B1 (en) * | 1999-12-30 | 2004-12-28 | Melaleuca, Inc. | Liquid automatic dishwashing detergent |
| DK1307547T3 (en) | 2000-07-28 | 2006-03-20 | Henkel Kgaa | Hitherto unknown amylolytic enzyme from Bacillus sp. A 7-7 (DSM 12368) and detergents with this novel amylolytic enzyme |
| US20030008794A1 (en) * | 2001-06-26 | 2003-01-09 | Diversey Lever, Inc. | Rinse-aid composition containing a bio-polypeptide |
| GB0717988D0 (en) | 2007-09-14 | 2007-10-24 | Reckitt Benckiser Nv | Composition |
| US10905305B2 (en) * | 2011-05-20 | 2021-02-02 | Ecolab Usa Inc. | Automated cleaning method and apparatus |
| US10400105B2 (en) | 2015-06-19 | 2019-09-03 | The Research Foundation For The State University Of New York | Extruded starch-lignin foams |
| JP6906142B2 (en) * | 2017-10-27 | 2021-07-21 | パナソニックＩｐマネジメント株式会社 | dishwasher |
| BE1030650B1 (en) * | 2022-06-20 | 2024-01-29 | Realco | COMPOSITION FOR STOPTING AND SAMPLING MICROORGANISMS |
| WO2023247502A1 (en) | 2022-06-20 | 2023-12-28 | Realco | Composition for releasing and sampling microorganisms |
| US20240218298A1 (en) * | 2022-12-15 | 2024-07-04 | Ecolab Usa Inc. | Cleaning compositions and methods of use thereof for starch and fats |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE1285087B (en) * | 1967-11-13 | 1968-12-12 | Miele & Cie Maschinenfabrik | Process for cleaning dishes soiled with starchy dishes in dishwashers |
| DE1728093A1 (en) * | 1968-08-24 | 1972-03-09 | Kronwitter Geb Staiber Lieselo | Process for cleaning dishes in household dishwashers and means for carrying out the process |
| DE2062465B2 (en) * | 1970-12-18 | 1976-11-25 | Henkel & Cie GmbH, 4000 Düsseldorf | DISHWASHING LIQUID |
| JPS5236106A (en) * | 1975-09-16 | 1977-03-19 | Kao Corp | Liquid detergent composition |
| US4166048A (en) * | 1975-09-22 | 1979-08-28 | Kao Soap Co., Ltd. | High foaming detergent composition having low skin irritation properties |
| US4136045A (en) * | 1976-10-12 | 1979-01-23 | The Procter & Gamble Company | Detergent compositions containing ethoxylated nonionic surfactants and silicone containing suds suppressing agents |
| CH651314A5 (en) * | 1981-12-23 | 1985-09-13 | Colgate Palmolive Co | DETERGENT COMPOSITION FOR DISHWASHER. |
| US5093031A (en) * | 1986-06-27 | 1992-03-03 | Isp Investments Inc. | Surface active lactams |
| DE3751821T2 (en) * | 1986-06-27 | 1996-10-31 | Isp Investments Inc | SURFACE ACTIVE LACTAME |
| US4762522A (en) * | 1987-03-02 | 1988-08-09 | Gaf Corporation | Agent for treatment of hides and pelts |
| US5078301A (en) * | 1987-10-02 | 1992-01-07 | Ecolab Inc. | Article comprising a water soluble bag containing a multiple use amount of a pelletized functional material and methods of its use |
| US5035859A (en) * | 1989-11-21 | 1991-07-30 | Schering Corporation | Contact lens disinfecting system |
| US5133892A (en) * | 1990-10-17 | 1992-07-28 | Lever Brothers Company, Division Of Conopco, Inc. | Machine dishwashing detergent tablets |
-
1991
- 1991-04-03 US US08/122,594 patent/US5399284A/en not_active Expired - Fee Related
- 1991-04-03 DE DE4110764A patent/DE4110764A1/en not_active Withdrawn
-
1992
- 1992-03-30 CA CA002107561A patent/CA2107561C/en not_active Expired - Fee Related
- 1992-03-30 ES ES92907055T patent/ES2070636T3/en not_active Expired - Lifetime
- 1992-03-30 AU AU14460/92A patent/AU655010B2/en not_active Ceased
- 1992-03-30 WO PCT/EP1992/000700 patent/WO1992017564A1/en active IP Right Grant
- 1992-03-30 DK DK92907055.5T patent/DK0578666T3/en active
- 1992-03-30 CZ CZ932043A patent/CZ284126B6/en not_active IP Right Cessation
- 1992-03-30 EP EP92907055A patent/EP0578666B1/en not_active Expired - Lifetime
- 1992-03-30 JP JP4506722A patent/JPH06510802A/en active Pending
- 1992-03-30 AT AT92907055T patent/ATE118241T1/en not_active IP Right Cessation
- 1992-03-30 RU RU9393058307A patent/RU2099402C1/en active
- 1992-03-30 DE DE59201366T patent/DE59201366D1/en not_active Expired - Lifetime
- 1992-03-30 IL IL10141492A patent/IL101414A/en not_active IP Right Cessation
- 1992-03-30 HU HU9302785A patent/HU212181B/en not_active IP Right Cessation
-
1995
- 1995-04-19 GR GR950401000T patent/GR3015871T3/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0700265B1 (en) * | 1993-05-25 | 1997-07-30 | Henkel-Ecolab GmbH & Co. OHG | Machine dish-washing process and device |
| EP2924101A1 (en) | 2014-03-24 | 2015-09-30 | Chemische Fabrik Dr. Weigert GmbH & Co KG | Cleaning agent and method for cleaning dishes |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4110764A1 (en) | 1992-10-08 |
| JPH06510802A (en) | 1994-12-01 |
| ATE118241T1 (en) | 1995-02-15 |
| CZ204393A3 (en) | 1995-09-13 |
| CA2107561C (en) | 1997-11-18 |
| US5399284A (en) | 1995-03-21 |
| CA2107561A1 (en) | 1992-10-04 |
| HU212181B (en) | 1996-03-28 |
| WO1992017564A1 (en) | 1992-10-15 |
| CZ284126B6 (en) | 1998-08-12 |
| GR3015871T3 (en) | 1995-07-31 |
| EP0578666A1 (en) | 1994-01-19 |
| IL101414A (en) | 1994-12-29 |
| HU9302785D0 (en) | 1994-01-28 |
| DE59201366D1 (en) | 1995-03-23 |
| HUT66756A (en) | 1994-12-28 |
| DK0578666T3 (en) | 1995-07-17 |
| IL101414A0 (en) | 1992-11-15 |
| RU2099402C1 (en) | 1997-12-20 |
| AU655010B2 (en) | 1994-12-01 |
| ES2070636T3 (en) | 1995-06-01 |
| AU1446092A (en) | 1992-11-02 |
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