EP1520279B1 - Zusammensetzung, schaum und verfahren zur dekontamination von oberflächen - Google Patents

Zusammensetzung, schaum und verfahren zur dekontamination von oberflächen Download PDF

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Publication number
EP1520279B1
EP1520279B1 EP03763928A EP03763928A EP1520279B1 EP 1520279 B1 EP1520279 B1 EP 1520279B1 EP 03763928 A EP03763928 A EP 03763928A EP 03763928 A EP03763928 A EP 03763928A EP 1520279 B1 EP1520279 B1 EP 1520279B1
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EP
European Patent Office
Prior art keywords
foam
use according
acid
chosen
mol
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.)
Expired - Lifetime
Application number
EP03763928A
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English (en)
French (fr)
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EP1520279A2 (de
Inventor
Sylvain Faure
Bruno Fournel
Paul Fuentes
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Orano Demantelement SAS
Original Assignee
Areva NC SA
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Publication of EP1520279A2 publication Critical patent/EP1520279A2/de
Application granted granted Critical
Publication of EP1520279B1 publication Critical patent/EP1520279B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • 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
    • C11D1/66—Non-ionic compounds
    • C11D1/662—Carbohydrates or derivatives
    • 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
    • C11D1/66—Non-ionic compounds
    • C11D1/75—Amino oxides
    • 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
    • C11D1/88—Ampholytes; Electroneutral compounds
    • C11D1/92—Sulfobetaines ; Sulfitobetaines
    • 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
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
    • C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
    • 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
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0094—High foaming compositions
    • 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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/042—Acids
    • 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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/044—Hydroxides or bases
    • 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
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/40—Specific cleaning or washing processes
    • C11D2111/42—Application of foam or a temporary coating on the surface to be cleaned

Definitions

  • the present invention relates to a composition, a solution and a decontamination foam.
  • the composition and the solution of the present invention make it possible to obtain a gelled acidic or basic aqueous foam that can be used for decontaminating surfaces.
  • the present invention finds for example an application in the decontamination of metal surfaces contaminated for example by grease, by radioactive mineral deposits, by a very adherent oxide layer or in the mass.
  • compositions and foams for surface treatments in particular for cleaning, degreasing and / or radioactive surface decontamination treatments, have been developed. Unfortunately, they all have the same drawbacks: they have lifetimes that are too short and difficult to control. Indeed, the foams of the prior art drain quickly, in minutes, and have a shelf life, defined as the time required for the total transformation of a given volume of foam into liquid, generally ranging from 1 to 10 minutes .
  • the cleaning agents and treatment used must often be chosen so as to be very active in a very short time. Only high concentrations of products or more corrosive products can therefore be used. This results in a limitation of the type of surface that can be treated, greater pollution, increased surface rinsing difficulties, and increased cost of treatment.
  • the present invention is specifically intended to provide a solution to the many problems of the prior art by providing a composition for preparing a foaming aqueous solution for generating a foam that does not have the disadvantages of the prior art.
  • the foams generated from the composition of the present invention thus comprise an agent gelling.
  • the life of this foam is considerably increased compared to the foams of the prior art, and the foam thus prepared has a significantly improved ability, compared to the foams of the prior art, to remain in contact with a surface, even vertical, for several hours thus ensuring the decontamination of said surface in static or spray mode.
  • This unexpected result leads to a greater effectiveness of the surface treatment, where appropriate with lower concentrations of decontamination agents, for example cleaning, degreasing or decontamination, and a decrease in the amount of effluent produced.
  • This solution can be prepared very easily, for example at room temperature, by simple mixing, adding in an aqueous solution, for example water, the surfactant (s), the gelling agent and, if it is useful, the decontaminating agent of the composition of the present invention.
  • an aqueous solution for example water, the surfactant (s), the gelling agent and, if it is useful, the decontaminating agent of the composition of the present invention.
  • the gelling agent is preferably biodegradable. It is advantageously a thickening organic agent having a pseudo-plastic rheological behavior.
  • the gelling agent may be chosen for example from the group comprising a water-soluble polymer or a hydrocolloid, a heteropolysaccharide chosen, for example, from the family of polyglucoside polymers with trisaccharide branched chains, such as xanthan gum, for example Rhodopol. 23 (trademark) marketed by Rhodia. It may also be chosen from the group comprising cellulose derivatives such as carboxymethylcellulose or a polysaccharide containing glucose as the only monomer, for example Amigel (trademark) marketed by Alban Muller International.
  • the surfactant may be a foaming nonionic surfactant chosen for example from the family of alkylpolyglucosides or alkylpolyetherglucosides. These surfactants are derived from natural glucose and have the advantage of being biodegradable. As an example, there may be mentioned surfactants "Oramix CG-110" (trademark) sold by the company SEPPIC, the "Glucopon 215" (trademark) marketed by the company AMI.
  • the surfactant can be an amphoteric surfactant, chosen, for example, from the family of sulfobetaines, the family of alkylamidopropylhydroxysulfobetaines, for example Amonyl 675 SB (trademark) marketed by SEPPIC, or from the family of amine-oxides, for example Aromox MCD-W (trademark), or cocodimethylamine oxide marketed by Akzo Nobel.
  • amphoteric surfactant chosen, for example, from the family of sulfobetaines, the family of alkylamidopropylhydroxysulfobetaines, for example Amonyl 675 SB (trademark) marketed by SEPPIC, or from the family of amine-oxides, for example Aromox MCD-W (trademark), or cocodimethylamine oxide marketed by Akzo Nobel.
  • composition of the present invention may comprise a single surfactant or a mixture of surfactants chosen for example from the abovementioned families.
  • composition of the present invention is presented primarily as a composition for generating a radioactive decontamination foam of a surface.
  • the decontamination agent is chosen according to the use for which the composition is intended.
  • the active agent is chosen in particular according to the nature of the contamination and the surface to be decontaminated, for example an acid or a mixture of acids, a base or a mixture base, an oxidizer, for example H 2 O 2 , a reducing agent, a disinfectant, etc.
  • an oxidizer for example H 2 O 2
  • a reducing agent for example a disinfectant, etc.
  • the person skilled in the art will know how to choose the decontamination agent according to his needs.
  • the active decontamination agent may be an acid or a mixture of acids, for example inorganic acids, advantageously chosen from the group comprising hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, and oxalic acid.
  • the acid is advantageously present at a concentration of 0.2 to 7 moles, preferably 0.3 to 7 moles, more preferably 1 to 4 moles. These concentration ranges naturally relate to the concentration of H + ions. In addition, they are given for the preparation of 1 liter of foaming solution. They therefore represent the concentration in mol / l in 1 liter of foaming solution prepared from this composition.
  • the active decontamination agent may be a base or a mixture of bases, for example inorganic (s), advantageously chosen from the group comprising sodium hydroxide, potassium hydroxide, sodium carbonate, etc.
  • the base is advantageously present at a concentration less than 2 mol.l -1 , preferably ranging from 0.5 to 1.5 mol.l -1 .
  • concentration ranges obviously concern the concentration of OH - ions.
  • they are given for the preparation of 1 liter of foaming solution. They therefore represent the concentration in mol / l in 1 liter of foaming solution prepared from this composition.
  • an acidic or alkaline foam may have either radiative deposits dissolving properties, for example for the removal of non-fixed contaminations on a surface, or corrosion properties. controlled surface for a contamination fixed on it.
  • the composition of the present invention has a viscosity at 0.3 rpm (Brookfield LVT, module x) of between 100 and 50,000 cP.
  • This viscosity allows indeed a longer life of the foam, as well as the ability to project this solution by means of a nozzle, or to pass through a porous lining to generate a foam.
  • the foam can be generated from this foaming solution by any foam generation system of the prior art: mechanical stirring, bubbling, static ball mill or any other device providing the gas-liquid mixture, such as the devices described in FR-A-2,817,170 or a device using a spray or spray nozzle, etc.
  • the generated foam can act statically, it has a long life, generally between 1 and 10 hours, and allows a duration of action on the controlled surface due to the control of the drainage time with the gelling agent.
  • the present invention also relates to a process for decontaminating a surface comprising a step of bringing the surface to be decontaminated into contact with a foam prepared from the composition of the present invention, that is to say with a foaming solution according to the present invention.
  • the invention relates generally to the treatment, in particular to the decontamination, of surfaces of any type, for example glass, plastic, metal, etc., which may be important, which are not necessarily horizontal, but which can be inclined or even vertical. It can be used for example to decontaminate tanks, ventilation ducts, storage pools, glove boxes, steam generators, pipes, floors, etc.
  • Decontamination foams can be used both in the periodic maintenance of existing industrial installations and in the dismantling of such installations. These installations can be, for example, nuclear installations or industrial chemistry in general.
  • the contacting of the foam with the surface to be treated can be done by conventional methods of filling, for example a tank, a tank or a pipe, the walls of which are to be decontaminated; spraying or spraying on the surface to be decontaminated; placing the foam into circulation in an installation whose surfaces are to be decontaminated; etc.
  • the foam may be applied to the surface to be decontaminated by any conventional method of spraying by means of a pump and a nozzle.
  • the bursting of the foam jet on the surface to be decontaminated can be obtained for example with a flat jet or round jet nozzle.
  • the short viscosity recovery time of the composition of the present invention allows the spray foam to adhere sufficiently long to the surface on which the foam is projected.
  • the method of the present invention may simply be to fill the vessel with the foam of the present invention so that its surfaces are in contact with the foam.
  • the foam then degrades naturally "in static” under the effect of its gravitational drainage.
  • static is then opposed to the dynamic application of foams consisting of a circulation or a spray.
  • the foam can also be applied only to the surfaces of the tank without necessarily filling it.
  • the subject of the invention is also a method of decontaminating an installation which comprises the simple introduction of the foam by simple filling inside the installation, the maintaining "static" this foam within the volume, for example at a temperature between 20 ° C and 50 ° C, during the foam drainage time, usually between 1 and 10 hours, and sufficient to guarantee the decontamination, then finally the elimination of the drained liquid by simple emptying.
  • the decontamination treatment of the surface may consist of several applications of the same foam or with foams of different nature applied successively. Each of these treatments may comprise a filling of the volume to be decontaminated or a projection of the foam on a surface, a holding for several hours of the foam in static during its drainage and the elimination of the drained liquid by simple emptying.
  • the inventors have however noted that, because of the lifetime of the foam of the present invention, which is longer than that of prior art foams, a small number of applications, see a single application, is sufficient to obtain effective treatment of a surface, where several applications were necessary with the foams of the prior art.
  • the contact time will depend essentially on the nature of the decontamination, the composition and nature of the foam, and the nature of the surface. Generally, a contact time of from 15 minutes to 10 hours is sufficient for effective treatment. This duration will be adapted according to the needs in the application made of the present invention.
  • the present invention guarantees a treatment, in particular an effective decontamination, because the lifetime of the foam, and therefore the contact time of the foam with the wall is increased and adjusted by the addition of the gelling agent which delays drainage. Furthermore, on vertical surfaces, or even ceilings, the foams of the present invention, because of the presence of the gelling agent, adhere better than the foams of the prior art, which further increases the effectiveness of treatment or decontamination on these surfaces.
  • the drained liquid obtained at the end of the life of the foam of the present invention can be evacuated easily by emptying and treated by the conventional decontamination processes of liquid effluents. It can also be regenerated, for example in the manner described in the document FR-A-2,817,170 , to reconstitute a foam.
  • the method of the present invention may further comprise, after the step of contacting the surface to be decontaminated with the foam, a step of rinsing said surface by means of a foam or a rinsing solution.
  • the foam or rinsing solution may be any foam or solution appropriate to the nature of the decontamination foam and / or the surface to be rinsed. It can be simply a conventional rinsing foam, or a rinsing foam according to the present invention, that is to say simply comprising a surfactant and a gelling agent, and optionally a conventional buffer compound allowing to neutralize the agent of acid or basic decontamination previously used or a surface treatment compound. It may also be an aqueous solution, for example water.
  • gelled foam The interest of such a treatment compared to existing treatments are numerous.
  • the decontamination foams prepared from the composition of the present invention advantageously have an abundance of the order of 10 to 15. They therefore make it possible to decontaminate a large volume, for example 100 m 3 , with less than 10 m 3. of liquid.
  • Another advantage particularly in the case of gelled foam spraying decontamination on radioactive plant surfaces, is that the gelled foam of the present invention produces smaller amounts of radioactive effluents due to its long service life. , whereas projections of aqueous solutions or foams of the prior art produce large quantities of radioactive effluents for limited effectiveness due to the low contact time with the treated surfaces.
  • Another advantage of the present invention lies in the fact that following the natural drainage of the foam of the present invention, the contaminated drained liquid is recovered, and the surface does not need to be rinsed with very little water. is about 1 liter / m 2 . Thus, less liquid effluents to be treated are generated subsequently. This results in a simplification in terms of global treatment of contamination, and a reduction in pollution.
  • a formulation called a reference formulation (allowing the generation of a reference foam), did not contain decontamination agent.
  • Table 1 below gathers the time t 1/2 necessary so that half of the liquid contained in the foam drains and the service life t 1 the time for all the liquid of the foam to drain for the different foams studied.
  • xanthan gum 1 g / l of xanthan gum Life time t and half life t 1/2 (in min and s) t 1/2 t 1 t 1/2 t 1 Nitric acid foam + hydrogen peroxide 4'30 " 15 ' 18 ' 50 ' Nitric acid foam + hydrofluoric acid 4'30 " 15 ' 24 ' 60 Nitric acid + oxalic acid foam 6 ' 20 ' 36 ' 80 ' Alkaline foam with sodium carbonate 7'30 " 25 '90' > 120 '
  • the time t 1/2 is about 20 minutes for the two acidic formulations containing hydrogen peroxide and hydrofluoric acid.
  • the foam containing oxalic acid is the most stable of acidic foams with a time t 1/2 of nearly 40 minutes.
  • the alkaline foam drains very slowly since it takes almost an hour and a half to recover half of the liquid.
  • the figure 5 is a graph illustrating the influence of the amount of xanthan gum on the delay in drainage (stability of the foam).
  • the objective is indeed to demonstrate that the foams prepared with the foaming solutions of the present invention can for example solubilize a deposit of reconstituted insoluble simulating a real deposit radiating adhering to a wall.
  • the two plates (42) covered with the deposit to be solubilized are voluntarily placed in the center of the column.
  • the column is filled until the samples are completely immersed and the generation is stopped when the highest edge of each of the two plates is at a depth of 10 cm in the foam.
  • This level of foam corresponds to 20 liters of foam and is voluntarily limited to quantify the efficiency of the upper part of the foam.
  • the low immersion of the plates is penalizing since the foam dries upwards under the effect of gravitational drainage.
  • the foam / deposition contact times are then shorter and may be insufficient to ensure effective dissolution. However, if the dissolution is important in the upper part of the foam, it will be even more in the foam.
  • the stopwatch is started when the column has been filled with 20 liters of foam and the foam is allowed to act statically.
  • the sample is removed after a given time to weigh the dissolution of the deposit. If two samples have been placed, one may be removed after one hour of immersion, for example, the other after two hours.
  • the foams are obtained successively in the following manner. 4 liters of a solution containing one of the three reagents, the surfactants and the xanthan gum are prepared. The solution is placed under stirring in the reactor (64) thermostated between 20 and 50 ° C. Then, a gas-liquid mixture of known proportion is then generated through a bed of glass beads: about 12 liters per hour of acid solution are mixed with a controlled gas flow rate of 180 liters per hour of air to generate a relatively wet foam of known overrun close to 14.
  • Foam phase tests were conducted for example with the carbonated foaming formulation containing 1.5 g / l of xanthan gum, of the brand Rhodopol 23. The lifetime of the foam is then of the order of 2 to 3 hours.
  • the objective of the test is to let a carbonated foam act statically and recover the sample once the foam has returned to the liquid state.
  • the test is carried out by preheating the foaming solution at 50 ° C., which makes it possible to obtain a temperature within the foam of 33 ° C. After one hour, the temperature of the foam is 30 ° C, and after two hours of 28 ° C. After 3 hours, the temperature is that of the laboratory (27 ° C) and the carbonated foam, obtained from a 1M solution, drained completely.
  • the dissolution rate of a deposit of 25 cm 2 in contact with the foam is of the order of 0.4 g / h, that is still 0.2 mm / h compared to the 0.8 g / h obtained in the liquid phase at 30 ° C.
  • This dissolution rate almost constant over the first two hours, shows, as in the case of the liquid phase, that the dissolution is regular and homogeneous on the surface. It advantageously makes it possible to completely solubilize an irradiating deposit of 0.5 mm in 3 hours at 30 ° C.

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Claims (17)

  1. Anwendung eines Schaums, zubereitet aus einer wässrigen Lösung, die pro Liter Lösung enthält:
    - 0,2 bis 2 Gew.-% einer schäumenden organischen oberflächenaktiven Substanz oder einer Mischung aus schäumenden oberflächenaktiven Substanzen,
    - von 0,1 bis 1,5 Gew.-% Geliermittel,
    - 0,2 bis 7 mol einer anorganischen Säure oder Base zur radioaktiven Dekontamination oder einer Mischung aus anorganischen Säuren oder Basen zur radioaktiven Dekontamination,
    in einem Verfahren zur radioaktiven Dekontamination einer Oberfläche.
  2. Anwendung nach Anspruch 1, bei dem die oberflächenaktive Substanz ein schäumendes nicht-ionisches Tensid ist.
  3. Anwendung nach Anspruch 1, bei dem die oberflächenaktive Substanz ein schäumendes nicht-ionisches Tensid ist, ausgewählt aus der Gruppe der Alkylpolyglucoside oder Alkylpolyglucosidether.
  4. Anwendung nach Anspruch 1, bei der die oberflächenaktive Substanz ein amphoteres Tensid ist.
  5. Anwendung nach Anspruch 1, bei der die oberflächenaktive Substanz ein amphoteres Tensid ist, ausgewählt aus der Gruppe der Sulfobetaine, der Gruppe der Alkylamidpropylhydroxysulfobetaine oder der Gruppe der Aminoxide.
  6. Anwendung nach Anspruch 1, bei der die Säure ausgewählt wird aus der Gruppe, die Salzsäure, Salpetersäure, Schwefelsäure, Phosphorsäure und Oxalsäure umfasst oder eine Mischung von Säuren dieser Gruppe ist.
  7. Anwendung nach Anspruch 1, bei der die Säuremenge 0,3 bis 7 mol entspricht.
  8. Anwendung nach Anspruch 1, bei der die Säuremenge 1 bis 4 mol entspricht.
  9. Anwendung nach Anspruch 1, bei der die Base ausgewählt wird aus der Gruppe, die Soda, Kali, Natriumcarbonat umfasst oder eine Mischung von Basen dieser Gruppe ist.
  10. Anwendung nach Anspruch 1, bei der die Base einer Menge unter 2 mol entspricht.
  11. Anwendung nach Anspruch 1, bei der die Base einer Menge von 0,5 bis 1,5 mol entspricht.
  12. Anwendung nach Anspruch 1, bei der das Geliermittel ein organisches Dickungsmittel ist, das eine Fließfähigkeit des pseudoplastischen Typs aufweist.
  13. Anwendung nach Anspruch 1, bei der das Geliermittel ausgewählt wird aus der ein wasserlösliches Polymer, ein Hydrokolloid, ein Heteropolysaccharid umfassenden Gruppe oder aus der die Cellulosederivate umfassenden Gruppe.
  14. Anwendung nach Anspruch 1, bei der das Geliermittel ausgewählt wird aus der Gruppe, welche umfasst: die aus der Gruppe der Polyglucosepolymere mit verzweigten Trisaccharidketten ausgewählten Heteropolysaccharide; die Cellulosederivate wie die Carboxymethylcellulose oder ein die Glucose als einziges Monomer enthaltendes Polysaccharid.
  15. Anwendung nach Anspruch 1, bei der das Geliermittel XanthanGummi ist.
  16. Anwendung nach Anspruch 1, bei der die zu dekontaminierende Oberfläche während 1 bis 10 Stunden mit dem Schaum in Kontakt gebracht wird.
  17. Anwendung nach Anspruch 16, außerdem - nach dem Herstellen des Kontakts des Schaums mit der zu dekontaminierenden Oberfläche - eine Spülung der genannten Oberfläche mittels einer Spüllösung umfassend.
EP03763928A 2002-07-08 2003-07-04 Zusammensetzung, schaum und verfahren zur dekontamination von oberflächen Expired - Lifetime EP1520279B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0208537 2002-07-08
FR0208537A FR2841802B1 (fr) 2002-07-08 2002-07-08 Composition, mousse et procede de decontamination de surfaces
PCT/FR2003/002078 WO2004008463A2 (fr) 2002-07-08 2003-07-04 Composition, mousse et procede de decontamination de surfaces

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JP5214841B2 (ja) 2013-06-19
ES2363081T3 (es) 2011-07-20
US20060211592A1 (en) 2006-09-21
ATE502387T1 (de) 2011-04-15
WO2004008463A2 (fr) 2004-01-22
US7662754B2 (en) 2010-02-16
RU2005102937A (ru) 2005-07-20
EP1520279A2 (de) 2005-04-06
UA83801C2 (ru) 2008-08-26
CN100351359C (zh) 2007-11-28
JP2005537462A (ja) 2005-12-08
AU2003260656A1 (en) 2004-02-02
AU2003260656A8 (en) 2004-02-02
DE60336397D1 (de) 2011-04-28
CN1666299A (zh) 2005-09-07
RU2333556C2 (ru) 2008-09-10
FR2841802B1 (fr) 2005-03-04
WO2004008463A3 (fr) 2004-04-08
FR2841802A1 (fr) 2004-01-09

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