EP0578666A1 - Process for removing starch-containing impurities from crockery and suitable tenside concentrates. - Google Patents

Process for removing starch-containing impurities from crockery and suitable tenside concentrates.

Info

Publication number
EP0578666A1
EP0578666A1 EP92907055A EP92907055A EP0578666A1 EP 0578666 A1 EP0578666 A1 EP 0578666A1 EP 92907055 A EP92907055 A EP 92907055A EP 92907055 A EP92907055 A EP 92907055A EP 0578666 A1 EP0578666 A1 EP 0578666A1
Authority
EP
European Patent Office
Prior art keywords
range
solution
dishes
surfactant solution
kilo
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.)
Granted
Application number
EP92907055A
Other languages
German (de)
French (fr)
Other versions
EP0578666B1 (en
Inventor
Olaf Schreiber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemische Fabrik Dr Weigert GmbH and Co
Original Assignee
WEIGERT CHEM FAB
Chemische Fabrik Dr Weigert GmbH and Co
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Publication of EP0578666A1 publication Critical patent/EP0578666A1/en
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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

  • the invention relates to a method for removing, in particular, starch-containing contaminations from dishes in dishwashers, comprising the steps:
  • alkaline cleaning agent formulations used which contain oxidizing agents in the form of peroxides or active chlorine compounds in addition to builder substances usually present.
  • the common cleaning agents have in common that due to their alkali setting, they cause pollution of the waste water.
  • 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; Although it is possible to remove most of the starch-containing impurities, a thin coating of starch-containing material often 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 outset, with which impurities occurring in the kitchen, in particular starch-containing impurities, can be removed effectively without the formation of the above-mentioned deposits, although a concentrated surfactant solution is used whose pH value is used is in the weakly acidic to weakly alkaline range.
  • k contains customary additives, such as defoamers, fragrances, dyes, thickeners, preservatives and hardness dispersants.
  • NC fi to C.sub.1 alkylpyrrolidones contained in the concentrated 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 to be used according to the invention and / or (preferably) amylases, 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 concentrates 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 products of on average 2 to 5 moles of ethylene oxide and 2 to 4, are particularly preferred Are 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 concentrates 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, likewise customary defoamers.
  • the optimum amount of the defoamers to be added depends on the chain length of the N-alkylpyrrolidones; longer-chain connections may require higher proportions of defoamers.
  • the concentrated surfactant solution has an N-Cg-C content.
  • 2- alkyl pyrrolidones in the range of 0.08 to 1.0 wt .-%.
  • the concentrated surfactant solution has a protease content in the range from 0.005 to 0.125 Anson units per 1 liter of solution.
  • the concentrated surfactant solution has an amylase content in the range from 0.15 to 2.0 kilo-novo units per 1 liter of solution.
  • the concentrated surfactant solution has a pH in the range from 6 to 8 set by means of buffer substances; Buffer systems suitable for this, for example NaHC0 3 / Na 2 C0 3 , are known to the person skilled in the art.
  • the concentrated surfactant solution is left at temperatures in the range from 30 to 60 ° C. for a period in the range from Act for 10 to 90 s on the mechanically pre-cleaned dishes.
  • 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.
  • the invention further relates to an aqueous surfactant concentrate containing, optionally after dilution with water,
  • aqueous surfactant concentrate of the invention result from the features explained above with regard to the method in which they are used.
  • a Winterhalter 2-tank box transport machine of the type WKTS-PWZNT 2600 was used, which, in front of the cleaning tank, was used to hold conventional cleaning agents compatible with surfactants of the concentrated surfactant solution, with a spray device for spraying on the aqueous ones Surfactant concentrates of the invention was equipped.
  • the water supply was carried out with softened Hamburg city water ( ⁇ 0.1 mmol Ca / 1).
  • standard rinse aids with a concentration of 0.3 g / 1 were used; the type of rinse aid is independent of the result of the desired removal of the starch deposits.
  • wash ware A ceramic tableware from a canteen with starch deposits covering at least 50% of the surface was used as the wash ware; this wash ware corresponds essentially 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.
  • this concentrate was mixed with a commercially available polyacrylate disperser up to a concentration of 100 ppm and had a pH of 7.2 +/- 0.4. Before being loaded into the test dishwasher, this concentrate was diluted with water to a total volume ratio of 1000 ml.
  • the concentrated surfactant solution obtained in this way was sprayed onto the dishes warmed at 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 aid step with a rinse aid which is also customary.

Abstract

Selon un procédé qui permet d'enlever de la vaisselle des salissures contenant de l'amidon, dans des lave-vaisselle, on utilise une solution aqueuse concentrée d'agents tensio-actifs qui contient entre 0,08 et 2,0 % en poids d'alkylpyrrolidone N-C8- à C12, entre 0,005 et 0,125 unités Anson d'une ou de plusieurs protéases et/ou 0,1 à 6 kilo-novo-unités d'une ou de plusieurs amylases par litre de solution, des substances de tamponnement actives dans une plage de pH comprise entre 5 et 9, ainsi que des solvants usuels et le cas échéant des additifs usuels, tels qu'agents anti-mousse, parfums, colorants, épaississants, agents conservateurs et des dispersants pour la dureté de l'eau.According to a process which makes it possible to remove dirt containing starch from dishes, in dishwashers, a concentrated aqueous solution of surfactants is used which contains between 0.08 and 2.0% by weight of N-C8- to C12-alkylpyrrolidone, between 0.005 and 0.125 Anson units of one or more proteases and/or 0.1 to 6 kilo-novo-units of one or more amylases per liter of solution, substances active in a pH range between 5 and 9, as well as common solvents and, where appropriate, common additives, such as antifoaming agents, perfumes, colorants, thickeners, preservatives and dispersants for the hardness of the water.

Description

yy
Verfahren zum Entfernen von stärkehaltigen Verunreinigungen von Geschirr und hierfür geeignete Tensidkonzentrate.Process for removing starchy contaminations from dishes and suitable surfactant concentrates.
Die Erfindung betrifft ein Verfahren zum Entfernen von insbe¬ sondere stärkehaltigen Verunreinigungen von Geschirr in Geschirrspülmaschinen mit den Schritten:The invention relates to a method for removing, in particular, starch-containing contaminations from dishes in dishwashers, comprising the steps:
a) mechanische Vorreinigung des Geschirrs von groben Verun¬ reinigungen/ a) mechanical pre-cleaning of the dishes from coarse impurities /
b) Besprühen des Geschirrs mit einer konzentrierten Tensid¬ lösung,b) spraying the dishes with a concentrated surfactant solution,
c) Einwirkenlassen der Tensidlösung bei Temperaturen im Be¬ reich zwischen der Umgebungstemperatur und etwa 60°C für eine im Bereich von 5 bis 300 s liegende Zeitspanne,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) maschinelle Reinigung des Geschirrs mit üblichen, mit den Tensiden der konzentrierten Tensidlösung verträglichen Reinigungsmittelnd) mechanical cleaning of the dishes with customary cleaning agents compatible with the surfactants of the concentrated surfactant solution
undand
e) Klarspülen.e) Rinse aid.
Im Bereich der lebensmittelverarbeitenden Industrie ein¬ schließlich des Küchenbereichs werden für die maschinelle Geschirreinigung mehr oder minder alkalische Reinigungsmittel¬ formulierungen eingesetzt, die zusätzlich zu üblicherweise vorhandenen Buildersubstanzen Oxidationsmittel in Form von Peroxiden oder Aktivchlorverbindungen enthalten. Den bekannten Reinigungsmitteln ist gemeinsam, daß sie infolge ihrer alkali¬ schen Einstellung eine Belastung des Abwassers bedingen. Speziell bei der Reinigung von Geschirr mit stärkehaltigen Verunreinigungen werden jedoch z.T. hochalkalische Reinigerlö¬ sungen 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 stärkehal¬ tigem 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 konzen¬ trierter alkalischer Lösungen in hierfür vorgesehenen Ge¬ schirrspülmaschinen ein nicht unerhebliches Gefahrenpotential für das Bedienungspersonal.In the area of the food processing industry including the kitchen area for the mechanical Dishwashing more or less alkaline cleaning agent formulations used, which contain oxidizing agents in the form of peroxides or active chlorine compounds in addition to builder substances usually present. The common cleaning agents have in common that due to their alkali setting, they cause pollution of the waste water. 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; Although it is possible to remove most of the starch-containing impurities, a thin coating of starch-containing material often 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 anfal¬ lende, insbesondere stärkehaltige Verunreinigungen wirkungs¬ voll ohne Ausbildung der vorstehend genannten Beläge entfernen lassen, obwohl dabei eine konzentrierte Tensidlösung zur Anwendung kommt, deren pH-Wert im schwachsauren bis schwach¬ alkalischen Bereich liegt.Accordingly, the invention is directed to a method of the type mentioned at the outset, with which impurities occurring in the kitchen, in particular starch-containing impurities, can be removed effectively without the formation of the above-mentioned deposits, although a concentrated surfactant solution is used whose pH value is used is in the weakly acidic to weakly alkaline range.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß man als konzentrierte Tensidlösung eine wäßrige Lösung verwendet, dieThis object is achieved in that an aqueous solution is used as the concentrated surfactant solution
f) 0,08 bis 2,0 Gew.-% N-Cg- bis C12-Alkylpyrrolidone, g) 0,005 bis 0,125 Anson-Einheiten einer Protease oder meh¬ rerer und/oder 0,1 bis 6 Kilo-Novoeinheiten einer Amylase oder mehrerer pro Tensidlösung,f) 0.08 to 2.0% by weight of N-Cg to C 12 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 surfactant solution,
h) im pH-Bereich von 5 bis 9 wirkende Puffersubstanzen undh) in the pH range from 5 to 9 acting buffer substances and
i) übliche Lösevermittler,i) usual solvency mediators,
sowie gegebenenfallsand if necessary
k) übliche Zusätze, wie Entschäumer, Duftstoffe, Farbstoffe, Verdickungsmittel, Konservierungsmittel und Härtedisper- gatoren, enthält.k) contains customary additives, such as defoamers, fragrances, dyes, thickeners, preservatives and hardness dispersants.
Die in den erfindungsgemäß zu verwendenden konzentrierten Tensidlösungen enthaltenen N-Cfi bis C.«-Alkylpyrrolidone, insbesondere solche mit geradkettigen Alkylgruppen, sind handelsübliche Verbindungen, die bisher überwiegend als oberflächenaktive Mittel in kosmetischen Formulierungen eingesetzt wurden.The NC fi to C.sub.1 alkylpyrrolidones contained in the concentrated 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 (bevor¬ zugt) Amylasen, die einzeln oder in Mischung zugesetzt werden können, sind handelsübliche Enzymsysteme.The proteases to be used according to the invention and / or (preferably) amylases, 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 Tensidkonzentraten der Erfindung zuzusetzende Entschäumer sind biologisch abbau¬ bare Addukte von Ethylenoxid und Propylenoxid an Fettalkohole mit Trübungspunkten in Wasser von < 50°C oder von Propylenoxid an Fettalkohole. Besonders bevorzugt sind Ethylenoxid/Propy- lenoxid-Addukte an Fettalkohole, die handelsübliche Blockad- dukte von im Zahlenmittel 2 bis 5 Mol Ethylenoxid und 2 bis 4 Mol Propylenoxid an 1 Mol Fettalkohole mit 12 bis 18, insbe¬ sondere 12 bis 14 Kohlenstoffatomen darstellen; sie können in den Tensidkonzentraten in einer Menge von 1 bis 3 Gew.-% enthalten sein. Die vorgenannten Entschäumer sind handelsübli¬ che 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 enthal¬ ten. Die optimale Menge der zuzusetzenden Entschäumer ist abhängig von der Kettenlänge der N-Alkylpyrrolidone; länger- kettige Verbindungen können höhere Anteile an den Entschäumern erfordern.Typical examples of defoamers which may be added to the surfactant concentrates 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 products of on average 2 to 5 moles of ethylene oxide and 2 to 4, are particularly preferred Are 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 concentrates 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, likewise customary defoamers. The optimum amount of the defoamers to be added depends on the chain length of the N-alkylpyrrolidones; longer-chain connections may require higher proportions of defoamers.
Gemäß einer bevorzugten Ausführungsform der Erfindung weist die konzentrierte Tensidlösung einen Gehalt an N-Cg-C.2-Alkyl- pyrrolidonen im Bereich von 0,08 bis 1,0 Gew.-% auf.According to a preferred embodiment of the invention, the concentrated surfactant solution has an N-Cg-C content. 2- alkyl pyrrolidones in the range of 0.08 to 1.0 wt .-%.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfin¬ dung weist die konzentrierte Tensidlösung einen Gehalt an Proteasen im Bereich von 0,005 bis 0,125 Anson-Einheiten pro 1 1 Lösung auf.According to a further advantageous embodiment of the invention, the concentrated 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 konzentrierte Tensidlösung einen Gehalt an Amylasen im Bereich von 0,15 bis 2,0 Kilo-Novoein- heiten pro 1 1 Lösung auf.According to a further, particularly advantageous embodiment of the invention, the concentrated surfactant solution has an amylase content in the range from 0.15 to 2.0 kilo-novo units per 1 liter of solution.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfin¬ dung weist die konzentrierte Tensidlösung einen mittels Puffersubstanzen eingestellten pH-Wert im Bereich von 6 bis 8 auf; hierfür geeignete Puffersysteme, z.B. NaHC03/Na2C03, sind dem Fachmann geläufig.According to a further advantageous embodiment of the invention, the concentrated surfactant solution has a pH in the range from 6 to 8 set by means of buffer substances; Buffer systems suitable for this, for example NaHC0 3 / Na 2 C0 3 , are known to the person skilled in the art.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfin¬ dung läßt man die konzentrierte 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 einwir¬ ken.According to a further advantageous embodiment of the invention, the concentrated surfactant solution is left at temperatures in the range from 30 to 60 ° C. for a period in the range from Act for 10 to 90 s on the mechanically pre-cleaned dishes.
Im Anschluß an den erfindungsgemäßen Einsatz der schwachsauren bis schwachalkalischen konzentrierten 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 according to the invention of the weakly acidic to weakly alkaline concentrated surfactant solutions, 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 mechani¬ schen 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 Geschirrspül¬ maschine vorgesehenen ArbeitsStationen durchzuführen.Moreover, it is not necessary to carry out the mechanical pre-cleaning steps and, if appropriate, also the spraying on of 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 ein wäßriges Tensidkonzen- trat, enthaltend, gegebenenfalls nach dem Verdünnen mit Wasser,The invention further relates to an aqueous surfactant concentrate containing, optionally after dilution with water,
a) 0,08 bis 2,0 Gew.-% N-C8- bis C-12- Alkylpyrrolidone,a) 0.08 to 2.0 wt .-% NC 8 - to C 12 - alkyl pyrrolidones,
b) 0,005 bis 0,125 Anson-Einheiten einer Protease oder mehrerer und/oder 0,1 bis 6 Kilo-Novoeinheiten einer Amylase oder mehrererb) 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
c) im pH-Bereich von 5 bis 9 wirkende Puffersubstanzenc) buffer substances acting in the pH range from 5 to 9
d) übliche Lösevermittlerd) usual brokers
sowie gegebenenfallsand if necessary
e) übliche Zusätze, wie Entschäumer, Duftstoffe, Farbstof¬ fe, Verdikkungsmittel , Konservierungsmittel und Härte¬ dispergatoren. Weitere vorteilhafte Ausgestaltungen des wäßrigen Tensidkon- zentrats der Erfindung ergeben sich aus den weiter oben erläuterten Merkmalen bezüglich des Verfahrens, in dem sie angewendet werden. e) usual additives, such as defoamers, fragrances, dyes, thickeners, preservatives and hardness dispersants. Further advantageous refinements of the aqueous surfactant concentrate of the invention result from the features explained above with regard to the method in which they are used.
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 Tensiden der konzentrierten Tensid¬ lösung verträglichen Reinigungsmitteln mit einer Sprühvorrich¬ tung zum Aufsprühen der wäßrigen Tensidkonzentrate der Erfin¬ dung ausgerüstet war. Die Wasserversorgung erfolgte mit enthärtetem Hamburger Stadtwasser (< 0,1 mmol Ca/1). In der Endstufe wurden übliche Klarspüler mit einer Konzentration von 0,3 g/1 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, in front of the cleaning tank, was used to hold conventional cleaning agents compatible with surfactants of the concentrated surfactant solution, with a spray device for spraying on the aqueous ones Surfactant concentrates of the invention was equipped. The water supply was carried out with softened Hamburg city water (<0.1 mmol Ca / 1). In the final stage, standard rinse aids with a concentration of 0.3 g / 1 were used; 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 Keramik¬ geschirr mit Stärkebelägen, die mindestens 50 % der Oberfläche bedeckten, verwendet; dieses Spülgut entspricht im wesentli¬ chen 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.A ceramic tableware from a canteen with starch deposits covering at least 50% of the surface was used as the wash ware; this wash ware corresponds essentially 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 ein wäßriges Tensidkonzentrat mit der folgenden Zusammensetzung bereitet:An aqueous surfactant concentrate with the following composition was first prepared:
25 g eines handelsüblichen Blockadduktes von 5 Mol Ethylenoxid und 4 Mol Propylenoxid an einen technischen25 g of a commercial block adduct of 5 moles of ethylene oxide and 4 moles of propylene oxide to a technical
C12/C14-Fettalkohol mit einem Trübungspunkt in Wasser von 28 - 32°C (Entschäumer),C12 / C14 fatty alcohol with a cloud point in water of 28 - 32 ° C (defoamer),
1 g N-n-Octylpyrrolidon,1 g of N-n-octylpyrrolidone,
5 g einer handelsüblichen wäßrigen Lösung eines Gemisches von Amylasen und Proteasen mit einer Aktivität von 1,5 Anson-Ein¬ heiten bzw. 50 Kilo-Novoeinheiten pro Liter, 0,4 g Natriumbicarbonat und5 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 Natriumcarbonat,0.1 g sodium carbonate,
ergänzt auf 100 ml Volumen mit Hamburger Stadtwasser; dieses Konzentrat wurde mit einem handelsüblichen Polyacrylatdisper- gator 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 dieses Konzentrat mit Wasser auf ein Gesamtvolumenverhältnis von 1000 ml verdünnt.supplemented to 100 ml volume with Hamburg city water; this concentrate was mixed with a commercially available polyacrylate disperser up to a concentration of 100 ppm and had a pH of 7.2 +/- 0.4. Before being loaded into the test dishwasher, this concentrate was diluted with water to a total volume ratio of 1000 ml.
Die so erhaltene konzentrierte Tensidlösung wurde in der vorgenannten Versuchsmaschine auf das eine Temperatur von ca. 40 - 45 °C warme Geschirr gesprüht. Nach einer Einwirkzeit von 15 s erfolgte ein "normales" Spülen mit einem handelsüblichen Geschirrspülmittel bei 60 °C, gefolgt von einem Klarspül¬ schritt mit einem ebenfalls üblichen Klarspülmittel.The concentrated surfactant solution obtained in this way was sprayed onto the dishes warmed at 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 aid step with a rinse aid which is also customary.
Die Untersuchung des so behandelten Geschirrs nach Stärkebele¬ gen mittels einer 0,5 %-igen Jodlösung ergab, daß die Stärke¬ belege vollständig entfernt worden waren. Examination of the dishes treated in this way after starch deposits using a 0.5% iodine solution showed that the starch covers had been completely removed.

Claims

Patentansprüche Claims
1. Verfahren zum Entfernen von insbesondere stärkehaltigen Verunreinigungen von Geschirr in Geschirrspülmaschinen mit den Schritten:1. A method for removing, in particular, starch-containing contaminations from dishes in dishwashers, comprising the steps:
a) mechanische Vorreinigung des Geschirrs von groben Verunreinigungen,a) mechanical pre-cleaning of the dishes from coarse dirt,
b) Besprühen des Geschirrs mit einer konzentrierten Tensidlösung,b) spraying the dishes with a concentrated surfactant solution,
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 Zeitspan¬ ne,c) allowing the surfactant solution to act at temperatures in the range between the ambient temperature and about 60 ° C. for a time span in the range from 5 to 300 s,
d) maschinelle Reinigung des Geschirrs mit üblichen, mit den Tensiden der konzentrierten Tensidlösung verträgli¬ chen Reinigungsmittelnd) mechanical cleaning of the dishes with customary cleaning agents compatible with the surfactants of the concentrated surfactant solution
undand
e) Klarspülen,e) rinse aid,
dadurch gekennzeichnet, daß man als konzentrierte Tensid¬ lösung eine wäßrige Lösung verwendet, diecharacterized in that an aqueous solution is used as the concentrated surfactant solution, the
f) 0,08 bis 2,0 Gew.-% N-Cg- bis C.j-Alkylpyrrolidone,f) 0.08 to 2.0 wt .-% N-alkyl pyrrolidones Cg to C j,
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 1 Lösung,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 1 solution,
h) im pH-Bereich von 5 bis 9 wirkende Puffersubstanzen und i) übliche Lösevermittler,h) in the pH range from 5 to 9 acting buffer substances and i) usual brokers,
sowiesuch as
k) gegebenenfalls übliche Zusätze, wie Entschäumer,k) optional additives, such as defoamers,
Duftstoffe, Farbstoffe, Verdickungsmittel, Konservie¬ rungsmittel und Härtedispergatoren, enthält.Contains fragrances, dyes, thickeners, preservatives and hardness dispersants.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man als Entschäumer Ethylenoxid/Propylenoxid-Addukte an Fettalkohole verwendet, die Blockaddukte von 2 bis 5 Mol Ethylenoxid und 2 bis 4 Mol Propylenoxid an 1 Mol Fettal¬ kohole mit 12 bis 18, insbesondere 12 bis 14 Kohlenstoff- atomen sind.2. The method according to claim 1, characterized in that ethylene oxide / propylene oxide adducts with fatty alcohols are used as defoamers, the block adducts of 2 to 5 moles of ethylene oxide and 2 to 4 moles of propylene oxide with 1 mole of fatty alcohols with 12 to 18, in particular 12 are up to 14 carbon atoms.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Tensidlösung einen Gehalt an3. The method according to claim 1 or 2, characterized in that the surfactant solution contains
N-Cg-C12-Alkylpyrrolidonen im Bereich von 0,08 bis 1,0 Gew.-% aufweist.N-Cg-C 12 alkyl pyrrolidones in the range of 0.08 to 1.0 wt .-%.
4. Verfahren nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die konzentrierte Tensidlösung einen Gehalt an Proteasen im Bereich von 0,005 bis 0,125 Anson-Einheiten pro 1 1 Lösung aufweist.4. The method according to at least one of claims 1 to 3, characterized in that the concentrated surfactant solution has a protease content in the range of 0.005 to 0.125 Anson units per 1 1 solution.
5. Verfahren nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die konzentrierte Tensidlösung einen Gehalt an Amylasen im Bereich von 0,15 bis 2 Kilo- Novoeinheiten pro 1 1 Lösung aufweist.5. The method according to at least one of claims 1 to 3, characterized in that the concentrated surfactant solution has an amylase content in the range of 0.15 to 2 kilo-Novo units per 1 1 solution.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die konzentrierte Tensidlösung einen mittels Puffersubstanzen eingestellten pH-Wert im Bereich von 6 bis 8 aufweist.6. The method according to any one of claims 1 to 5, characterized in that the concentrated surfactant solution has a pH in the range of 6 to 8 set by means of buffer substances.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß man die konzentrierte Tensidlösung bei Temperaturen im Bereich von 30 bis 60°C für eine Zeitspan¬ ne im Bereich von 10 bis 90 s einwirken läßt.7. The method according to any one of claims 1 to 6, characterized in that the concentrated surfactant solution Temperatures in the range of 30 to 60 ° C for a time span in the range of 10 to 90 s.
8. Wäßriges Tensidkonzentrat, enthaltend, ggf. nach dem Verdünnen mit Wasser,8. Aqueous surfactant concentrate, containing, if necessary after dilution with water,
a) 0,08 bis 2,0 Gew.-% N-Cg- bis C-12-Alkylpyrrolidone,a) 0.08 to 2.0% by weight of N-Cg- to C- 12- alkylpyrrolidones,
b) 0,005 bis 0,125 Anson-Einheiten einer Protease oder mehrerer und/oder 0,1 bis 6 Kilo-Novoeinheiten einer Amylase oder mehrererb) 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
c) im pH-Bereich von 5 bis 9 wirkende Puffersubstanzenc) buffer substances acting in the pH range from 5 to 9
d) übliche Lösevermittlerd) usual brokers
sowie gegebenenfallsand if necessary
e) übliche Zusätze, wie Entschäumer, Duftstoffe, Farbstof¬ fe, Verdikkungsmittel, Konservierungsmittel und Härte- dispergatoren.e) usual additives, such as defoamers, fragrances, dyes, thickeners, preservatives and hardness dispersants.
9. Wäßriges Tensidkonzentrat nach Anspruch 8, gekennzeichnet durch einen Gehalt an N-Cg-C.2-Alkylpyrrolidonen im Bereich von 0,08 bis 1,0 Gew.-%.9. Aqueous surfactant concentrate according to claim 8, characterized by a content of N-Cg-C. 2- alkyl pyrrolidones in the range of 0.08 to 1.0 wt .-%.
10. Wäßriges Tensidkonzentrat nach Anspruch 8 oder 9, gekenn¬ zeichnet durch einen Gehalt an Proteasen im Bereich von 0,005 bis 0,125 Anson-Einheiten pro 1 1 Lösung.10. Aqueous surfactant concentrate according to claim 8 or 9, gekenn¬ characterized by a content of proteases in the range of 0.005 to 0.125 Anson units per 1 1 solution.
11. Wäßriges Tensidkonzentrat nach mindestens einem der Ansprüche 1 bis 10, gekennzeichnet durch einen Gehalt an Amylasen im Bereich von 0,15 bis 2 Kilo-Novoeinheiten pro 1 1 Lösung.11. Aqueous surfactant concentrate according to at least one of claims 1 to 10, characterized by a content of amylases in the range from 0.15 to 2 kilo-novo units per 1 1 solution.
12. Wäßriges Tensidkonzentrat nach mindestens einem der Ansprüche 8 bis 11, gekennzeichnet durch einen mittels Puffersubstanzen eingestellten pH-Wert im Bereich von 6 bis 8. 12. Aqueous surfactant concentrate according to at least one of claims 8 to 11, characterized by an agent Buffer substances set pH in the range of 6 to 8.
EP92907055A 1991-04-03 1992-03-30 Process for removing starch-containing impurities from crockery and suitable tenside compositions Expired - Lifetime EP0578666B1 (en)

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 true EP0578666A1 (en) 1994-01-19
EP0578666B1 EP0578666B1 (en) 1995-02-08

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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)

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BE1030650B1 (en) * 2022-06-20 2024-01-29 Realco COMPOSITION FOR STOPTING AND SAMPLING MICROORGANISMS

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HU9302785D0 (en) 1994-01-28
IL101414A (en) 1994-12-29
AU1446092A (en) 1992-11-02
DE4110764A1 (en) 1992-10-08
RU2099402C1 (en) 1997-12-20
GR3015871T3 (en) 1995-07-31
WO1992017564A1 (en) 1992-10-15
EP0578666B1 (en) 1995-02-08
DE59201366D1 (en) 1995-03-23
CZ204393A3 (en) 1995-09-13
AU655010B2 (en) 1994-12-01
US5399284A (en) 1995-03-21
IL101414A0 (en) 1992-11-15
CA2107561A1 (en) 1992-10-04
JPH06510802A (en) 1994-12-01
ES2070636T3 (en) 1995-06-01
CA2107561C (en) 1997-11-18
CZ284126B6 (en) 1998-08-12
HU212181B (en) 1996-03-28
ATE118241T1 (en) 1995-02-15
HUT66756A (en) 1994-12-28
DK0578666T3 (en) 1995-07-17

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