WO2004008463A2 - Composition, mousse et procede de decontamination de surfaces - Google Patents
Composition, mousse et procede de decontamination de surfaces Download PDFInfo
- Publication number
- WO2004008463A2 WO2004008463A2 PCT/FR2003/002078 FR0302078W WO2004008463A2 WO 2004008463 A2 WO2004008463 A2 WO 2004008463A2 FR 0302078 W FR0302078 W FR 0302078W WO 2004008463 A2 WO2004008463 A2 WO 2004008463A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- foam
- use according
- acid
- surfactant
- decontamination
- Prior art date
Links
- 239000006260 foam Substances 0.000 title claims abstract description 144
- 239000000203 mixture Substances 0.000 title claims abstract description 72
- 238000005202 decontamination Methods 0.000 title claims description 42
- 230000003588 decontaminative effect Effects 0.000 title claims description 40
- 238000000034 method Methods 0.000 title claims description 10
- 239000004094 surface-active agent Substances 0.000 claims abstract description 26
- 239000003349 gelling agent Substances 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims description 34
- 238000005187 foaming Methods 0.000 claims description 32
- 229920001285 xanthan gum Polymers 0.000 claims description 14
- 239000000230 xanthan gum Substances 0.000 claims description 13
- 229940082509 xanthan gum Drugs 0.000 claims description 13
- 235000010493 xanthan gum Nutrition 0.000 claims description 13
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 11
- 230000002285 radioactive effect Effects 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 239000012487 rinsing solution Substances 0.000 claims description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 239000002280 amphoteric surfactant Substances 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 150000004676 glycans Chemical class 0.000 claims description 2
- 239000000416 hydrocolloid Substances 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 150000004043 trisaccharides Chemical class 0.000 claims description 2
- 229920003169 water-soluble polymer Polymers 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 2
- 150000007529 inorganic bases Chemical class 0.000 claims 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims 1
- 150000001412 amines Chemical class 0.000 claims 1
- 239000002562 thickening agent Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 10
- 239000006265 aqueous foam Substances 0.000 abstract description 3
- 238000005238 degreasing Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 27
- 238000011282 treatment Methods 0.000 description 20
- 239000003795 chemical substances by application Substances 0.000 description 18
- 238000009472 formulation Methods 0.000 description 17
- 238000004090 dissolution Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 9
- 238000005507 spraying Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000001464 adherent effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 229920005372 Plexiglas® Polymers 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000012756 surface treatment agent Substances 0.000 description 2
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 1
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- YXJYBPXSEKMEEJ-UHFFFAOYSA-N phosphoric acid;sulfuric acid Chemical compound OP(O)(O)=O.OS(O)(=O)=O YXJYBPXSEKMEEJ-UHFFFAOYSA-N 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- RJSZFSOFYVMDIC-UHFFFAOYSA-N tert-butyl n,n-dimethylcarbamate Chemical compound CN(C)C(=O)OC(C)(C)C RJSZFSOFYVMDIC-UHFFFAOYSA-N 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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 subject of the present invention is a composition, a solution and a decontamination foam.
- the composition and the solution of the present invention make it possible to obtain an acidic or basic gelled aqueous foam which can be used to decontaminate surfaces.
- the present invention finds for example an application in the decontamination of metallic surfaces contaminated for example by grease, by radioactive mineral deposits, by a very adherent oxide layer or in the mass.
- compositions and foams intended for surface treatments in particular for cleaning, degreasing and / or radioactive decontamination of surfaces, have been developed.
- the foams of the prior art drain quickly, in a few minutes, and have a lifespan, defined as the time necessary for the total transformation of a given volume of foam into liquid, generally ranging from 1 to 10 minutes. .
- the duration of contact of the foam with the surface being limited due to the short lifespan of the foams, the cleaning and treatment agents 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 difficulties in rinsing the surfaces, and an increase in the cost of treatment.
- the object of the present invention is precisely to provide a solution to the numerous problems of the prior art by providing a composition intended for preparing an aqueous foaming solution making it possible to generate a foam which does not have the drawbacks of the prior art.
- composition of the present invention comprises:
- the foams generated from the composition of the present invention therefore 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 markedly improved ability, compared to the foams of the prior art, to remain in contact with a surface, even vertical, for several hours thus making it possible to ensure the decontamination of said surface in static or in spraying mode.
- This unexpected result leads to greater efficiency in the treatment of the surface, if necessary with lower concentrations of decontamination agents, for example cleaning, degreasing or decontamination, and a reduction in the quantity of effluents produced.
- active decontamination agents which are less corrosive than those of the prior art because the contact of the foam of the present invention with the surface to be treated is prolonged.
- composition of the present invention is an aqueous solution which comprises per liter of solution:
- This solution can be very easily prepared, for example at room temperature, by simple mixing, by adding to an aqueous solution, for example water, the surfactant (s), the gelling agent and, if it is useful, the decontamination agent for the composition of the present invention.
- the gelling agent is preferably biodegradable. It is advantageously a thickening organic agent exhibiting a rheological behavior of the pseudoplastic type.
- the gelling agent can 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 branched trisaccharide chains, such as xanthan gum, for example Rhodopol. 23 (trademark) marketed by the company Rhodia. It can 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) sold by the company Alban Muller International.
- a water-soluble polymer or a hydrocolloid a heteropolysaccharide chosen, for example, from the family of polyglucoside polymers with branched trisaccharide chains, such as xanthan gum, for example Rhodopol. 23 (trademark) marketed by the company Rhodia. It can also be chosen from the group comprising cellulose derivatives such as carboxymethylcellulose or a polys
- the surfactant can be a nonionic foaming 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.
- these surfactants are derived from natural glucose and have the advantage of being biodegradable.
- the surfactants “Oramix CG-110" (trademark) sold by the company SEPPIC, "Glucopon. 215" (trademark) sold 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 sold by the company Akzo Nobel.
- the 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 mainly as a composition for generating a decontamination foam on a surface.
- the present invention also covers any composition making it possible to generate a foam, whatever its use, provided that it comprises a surfactant and a gelling agent.
- the composition of the present invention may also be a composition only comprising these two elements, and for preparing a rinsing foam, or a composition further comprising a surface treatment agent for preparing a foam surface treatment.
- the surface treatment agent can be, for example, an antioxidant, an antiseptic, etc.
- the decontamination agent when present, 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 bases, an oxidant, for example H 2 0 2 , a reducing agent, a disinfectant, etc.
- an oxidant for example H 2 0 2
- a reducing agent for example H 2 0 2
- a disinfectant etc.
- the active decontamination agent can be an acid or a mixture of acids, for example inorganic (s), 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 from 0.3 to 7 moles, more preferably from 1 to 4 moles. These concentration ranges obviously relate to the concentration of H + ions.
- they are given for the preparation of 1 liter of foaming solution. They therefore represent the concentration in moles / 1 in 1 liter of foaming solution prepared from this composition.
- the active decontamination agent can be a base or a mixture of bases, for example inorganic (s), advantageously chosen from the group comprising soda, potash, 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 relate to the concentration of OH " ions.
- they are given for the preparation of 1 liter of foaming solution. They therefore represent the concentration in moles / 1 in 1 liter of foaming solution prepared from this composition.
- an acid or alkaline foam may have either dissolution properties of irradiating radioactive deposits, for example for the elimination of contaminations which are not fixed on a surface, or corrosion properties. surface checked for contamination attached to 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 in fact allows an extended lifetime of the foam, as well as the possibility of projecting this solution by means of a nozzle, or of passing it 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 agitation, bubbling, static ball mixer or any other device ensuring 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 foam generated can act static, it has a long lifespan, generally between 1 and 10 hours, and allows a duration of action on the controlled surface due to the control of the drainage time thanks to the gelling agent.
- the present invention also relates to a method for decontaminating a surface comprising a step consisting in 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 all types, for example glass, plastic, metal, etc., which may be large, which are not necessarily horizontal, but which can be tilted or even vertical. It can be used, for example, to decontaminate tanks, ventilation ducts, storage pools, glove boxes, vapor generators, pipes, floors, etc.
- the decontamination foams can be used both in the context of periodic maintenance of existing industrial installations and in the context of dismantling such installations. These installations can for example be nuclear or industrial chemistry installations in general.
- the contacting of the foam with the surface to be treated can be done by conventional methods of filling, for example of a tank, a tank or a pipe, the walls of which are to be decontaminated; spraying or spraying onto the surface to be decontaminated; circulating the foam in an installation whose surfaces are to be decontaminated; etc.
- the foam can be applied to the surface to be decontaminated by any conventional spraying method using 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 recovery time of the viscosity of the composition of the present invention allows the sprayed foam to adhere sufficiently long to the surface on which the foam is sprayed.
- the method of the present invention can simply consist in filling the tank with the foam of the present invention so that its surfaces are in contact with the foam.
- the foam then degrades naturally "static” under the effect of its gravitational drainage.
- static is then opposed to the dynamic application of foams consisting of a circulation or a spraying.
- the foam can also be applied only to the surfaces of the tank without necessarily filling it.
- the invention also relates to a process for decontaminating an installation which comprises the simple introduction of the foam by simple filling inside the installation, the "static" maintenance of this foam inside the volume, for example at a temperature of between 20 ° C. and 50 ° C., during the duration of drainage of the foam, most often between 1 and 10 hours, and sufficient to guarantee decontamination, then finally elimination of the drained liquid by simple emptying.
- the surface decontamination treatment can consist of several applications of the same foam or with foams of different nature applied successively. Each of these treatments may include filling the volume to be decontaminated or spraying the foam onto a surface, keeping the foam static for several hours during its drainage and eliminating the liquid drained by simple draining.
- the inventors have noted, however, that, because of the lifetime of the foam of the present invention, which is longer than that of the foams of the prior art, a reduced number of applications, even a single application, is sufficient to obtain an effective treatment of a surface, where several applications were necessary with the foams of the prior art.
- the duration of contacting will essentially depend on the nature of the decontamination, the composition and the nature of the foam, and the nature of the surface. Generally, a duration of contact which can range from 15 minutes to 10 hours is sufficient for effective treatment. This duration will be adapted as necessary in the application made of the present invention.
- the present invention guarantees an effective treatment, in particular decontamination, because the life of the foam, and therefore the time of contact of the foam with the wall is increased and adjusted by the addition of the gelling agent which delays drainage.
- the foams of the present invention due to 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 easily evacuated by draining and treated by conventional channels for decontaminating liquid effluents. It can also be regenerated, for example as described in document FR-A-2 817 170, to reconstitute a foam.
- the method of the present invention may further comprise, after the step of bringing the surface to be decontaminated into contact with the foam, a step of rinsing said surface using a foam or a rinsing solution.
- the foam or the rinsing solution may be any foam or solution suitable depending on the nature of the decontamination foam and / or the surface to be rinsed. It may simply be a conventional rinsing foam, or a rinsing foam in accordance with 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 acid or basic decontamination previously used or a surface treatment compound. It can also be an aqueous solution, for example water.
- gelled foam in accordance with the present invention compared to existing treatments are numerous.
- the foam consists of a dispersion of air bubbles in liquid and can be characterized by its expansion "F" defined under normal conditions of temperature and pressure by the following relation (1):
- the decontamination foams prepared from the composition of the present invention advantageously have an expansion of the order of 10 to 15. They therefore make it possible to decontaminate a large volume, for example of 100 m 3 , with less than 10 m 3 liquid.
- Another advantage in particular in the case of decontamination by spraying gelled foam onto surfaces of radioactive installations, is that the gelled foam of the present invention produces smaller amounts of radioactive effluents due to its long lifespan. , while projections of aqueous solutions or foams of the prior art produce large quantities of radioactive effluents for limited effectiveness due to the short contact time with the treated surfaces.
- Another advantage of the present invention resides in the fact that following the natural drainage of the foam of the present invention, the contaminated drained liquid is recovered, and the surface only needs to be rinsed with very little water, c is to say approximately 1 liter / m 2 . Thus, less liquid effluents to be treated are generated subsequently. This results in a simplification in terms of the overall contamination treatment chain, and a reduction in pollution.
- Figure 1 is a schematic representation of the device used by the inventors to generate a foam from an aqueous solution of the composition of the present invention, and to measure the kinetics of drainage of the foam obtained.
- FIG. 2 is a graph illustrating the kinetics of drainage expressed in fractions (F) of recovered liquid (in g) as a function of time (t) (in minutes), for different foams obtained from different compositions of the present invention.
- Figure 3 is a graph illustrating kinetics of drainage expressed in volumes (V) of drained liquid (in ml) as a function of time (t) (in minutes), for different foams obtained on the one hand from different compositions of the present invention and on the other hand from compositions without ge1ifying agent.
- Figure 4 is a schematic representation of the device used by the inventors to generate a foam from a composition of the present invention, and to implement a method of decontaminating a surface according to the present invention.
- Figure 5 is a graph illustrating the influence of the quantity of xanthan gum (Xant) (in g / 1), on the delay in drainage (foam stability): height of liquid drained (H) (in mm) as a function of time (t) (in minutes).
- Xant xanthan gum
- H liquid drained
- t time
- EXAMPLE 1 BACKGROUND FOAMS The drainage and efficiency properties of foams prepared from five foaming solutions were each studied, each containing a reference mixture of two surfactants: Oramix (trademark) at 8 g / 1. and Amoyl (trademark) at 3 g / 1.
- a formulation called the reference formulation (allowing the generation of a reference foam), did not contain a decontamination agent.
- FIG. 1 An experimental protocol has been developed for tracing the drainage kinetics of each of the foams under conditions close to an industrial reality by means of the device (I) shown diagrammatically in FIG. 1.
- the following references indicate the elements following of the device (I): 30 (3): tank for preparing the foaming solution; (5): foaming solution; (7): agitator mechanical ; (9) pump; (11): compressed air supply system; (13): flow regulator; (15): foam generator; (17) pipes; (19): foam receiving tank; (21): foam; (23): manual valve; and (25): drained liquid recovery tank.
- Each of the five formulations has excellent foamability since foams with an expansion of more than 10 have been prepared. It appears from the kinetic studies that the presence of the decontamination agents does not or hardly modify the drainage kinetics with respect to the reference foam without decontamination agent as shown in FIG. 2. Over all of the formulations prepared, more than the half of the liquid drains in less than 8 minutes and the lifespans of each of the formulations remain short (15 to 25 minutes).
- Table 1 below collates the time t ⁇ 2 necessary so that half of the liquid contained in the foam drains and the lifespan ti the time so that all the liquid of the foam drains for the various foams studied.
- the time t ⁇ / 2 is approximately 20 minutes for the two acid formulations containing hydrogen peroxide and hydrofluoric acid.
- the foam containing oxalic acid is the most stable of the acid foams with a time t ⁇ / 2 of almost 40 minutes.
- the alkaline foam drains very slowly since it takes almost an hour and a half to recover half of the liquid.
- Figure 5 is a graph illustrating the influence of the amount of xanthan gum on the delay in drainage (foam stability).
- the foams prepared with the foaming solutions of the present invention can, for example, dissolve a deposit of reconstituted insolubles simulating a real irradiating deposit adhering to a wall.
- Stainless steel plates covered with adherent deposits are suspended in a 30-liter plexiglass column in the device (II) shown diagrammatically in FIG. 4.
- the following references indicate the following elements of the device (II):
- the two plates (42) covered with the deposit to be dissolved 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 deliberately limited to quantify the effectiveness of the upper part of the foam.
- the low immersion of the plates is detrimental since the foam dries up from the top under the effect of gravitational drainage.
- the foam / deposit contact times are then shorter and may prove to be insufficient to ensure effective dissolution.
- the dissolution is important in the upper part of the foam, it will be even more so within the foam.
- the stopwatch is started when the column has been filled with 20 liters of foam and the foam is left to act statically. The sample is removed after a given time in order to evaluate the dissolution of the deposit by weighing. If two samples have been placed, one can 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 reactants, the surfactants and the xanthan gum are prepared. The solution is placed under stirring in the reactor (64) thermostatically controlled between 20 and 50 ° C. Then, a gas-liquid mixture of known proportion is then generated through a bed of glass beads: approximately 12 liters per hour of acid solution are mixed with a controlled gas flow of 180 liters per hour of air to generate a relatively moist foam of known expansion close to 14. Tests in the foam phase were carried out for example with the foaming carbonate formulation and containing 1.5 g / 1 of xanthan gum, of the brand Rhodopol 23. The life of the foam is then of the order of 2 to 3 hours.
- the objective of the test is to allow a carbonated foam to act statically and to recover the sample once the foam has returned to the liquid state.
- the test is carried out by preheating the foaming solution to 50 ° C, which allows a temperature within the foam to be obtained of 33 ° C. After one hour, the temperature of the foam is 30 ° C, and after two hours 28 ° C. After 3 hours, the temperature is that of the laboratory (27 ° C) and the carbonated foam, obtained from a 1 M solution, has completely drained.
- the sample invisible at first because immersed in the foam, appears to be completely free of the deposit.
- the mass dissolved in two hours i.e. 0.74 g or 0.71 g
- the dissolution rate of a deposit of 25 cm 2 in contact with the foam is of the order of 0.4 g / h, or again 0.2 mm / h , to compare with 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 dissolve an irradiating deposit of 0.5 mm in 3 hours at 30 ° C.
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UAA200500148A UA83801C2 (ru) | 2002-07-08 | 2003-07-04 | Применение пены в процессе обеззараживания поверхностей |
AU2003260656A AU2003260656A1 (en) | 2002-07-08 | 2003-07-04 | Composition, foam and method for surface decontamination |
AT03763928T ATE502387T1 (de) | 2002-07-08 | 2003-07-04 | Zusammensetzung, schaum und verfahren zur dekontamination von oberflächen |
JP2004520725A JP5214841B2 (ja) | 2002-07-08 | 2003-07-04 | 表面汚染除去のための組成物、気泡および方法 |
DE60336397T DE60336397D1 (de) | 2002-07-08 | 2003-07-04 | Zusammensetzung, schaum und verfahren zur dekontamination von oberflächen |
US10/520,438 US7662754B2 (en) | 2002-07-08 | 2003-07-04 | Composition, foam and process for the decontamination of surfaces |
EP03763928A EP1520279B1 (fr) | 2002-07-08 | 2003-07-04 | Composition, mousse et procede de decontamination de surfaces |
Applications Claiming Priority (2)
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004008463A2 true WO2004008463A2 (fr) | 2004-01-22 |
WO2004008463A3 WO2004008463A3 (fr) | 2004-04-08 |
Family
ID=29725255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/FR2003/002078 WO2004008463A2 (fr) | 2002-07-08 | 2003-07-04 | Composition, mousse et procede de decontamination de surfaces |
Country Status (12)
Country | Link |
---|---|
US (1) | US7662754B2 (fr) |
EP (1) | EP1520279B1 (fr) |
JP (1) | JP5214841B2 (fr) |
CN (1) | CN100351359C (fr) |
AT (1) | ATE502387T1 (fr) |
AU (1) | AU2003260656A1 (fr) |
DE (1) | DE60336397D1 (fr) |
ES (1) | ES2363081T3 (fr) |
FR (1) | FR2841802B1 (fr) |
RU (1) | RU2333556C2 (fr) |
UA (1) | UA83801C2 (fr) |
WO (1) | WO2004008463A2 (fr) |
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---|---|---|---|---|
WO2008101855A1 (fr) | 2007-02-15 | 2008-08-28 | Commissariat A L'energie Atomique | Mousse de décontamination, de décapage et/ou de dégraissage à particules solides |
RU2470068C2 (ru) * | 2007-02-15 | 2012-12-20 | Коммиссариат А Л'Энержи Атомик | Обеззараживающая, очищающая и/или обезжиривающая пена, содержащая твердые частицы |
US8772357B2 (en) | 2007-02-15 | 2014-07-08 | Commissariat A L'energie Atomique | Decontamination, stripping and/or degreasing foam containing solid particles |
US9603384B2 (en) | 2010-09-09 | 2017-03-28 | Frito-Lay Trading Company, Gmbh | Stabilized foam |
FR3016297A1 (fr) * | 2014-01-14 | 2015-07-17 | Commissariat Energie Atomique | Procede de traitement des residus a base de sodium utilisant une mousse aqueuse |
WO2015107049A1 (fr) * | 2014-01-14 | 2015-07-23 | Commissariat à l'énergie atomique et aux énergies alternatives | Procédé de traitement des résidus à base de sodium utilisant une mousse aqueuse |
WO2016202879A1 (fr) | 2015-06-16 | 2016-12-22 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Mousse aqueuse désinfectante, son procédé de préparation et ses utilisations |
US10563154B2 (en) | 2015-06-16 | 2020-02-18 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Disinfecting aqueous foam, process for preparing same and use thereof |
WO2020115443A1 (fr) | 2018-12-07 | 2020-06-11 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Pâte de decontamination et procede de decontamination d'un substrat en un materiau solide utilisant cette pâte |
FR3089520A1 (fr) | 2018-12-07 | 2020-06-12 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Pâte de decontamination et procede de decontamination d’un substrat en un materiau solide utilisant cette pâte |
FR3134525A1 (fr) | 2022-04-19 | 2023-10-20 | Orano Mining | Procédé d’irrigation au moyen d’une mousse d’un substrat poreux et ses utilisations |
WO2023203298A1 (fr) | 2022-04-19 | 2023-10-26 | Orano Mining | Procédé d'irrigation au moyen d'une mousse d'un substrat poreux et ses utilisations |
Also Published As
Publication number | Publication date |
---|---|
RU2005102937A (ru) | 2005-07-20 |
JP2005537462A (ja) | 2005-12-08 |
AU2003260656A1 (en) | 2004-02-02 |
US20060211592A1 (en) | 2006-09-21 |
RU2333556C2 (ru) | 2008-09-10 |
AU2003260656A8 (en) | 2004-02-02 |
DE60336397D1 (de) | 2011-04-28 |
CN1666299A (zh) | 2005-09-07 |
UA83801C2 (ru) | 2008-08-26 |
WO2004008463A3 (fr) | 2004-04-08 |
CN100351359C (zh) | 2007-11-28 |
EP1520279A2 (fr) | 2005-04-06 |
JP5214841B2 (ja) | 2013-06-19 |
ATE502387T1 (de) | 2011-04-15 |
ES2363081T3 (es) | 2011-07-20 |
US7662754B2 (en) | 2010-02-16 |
EP1520279B1 (fr) | 2011-03-16 |
FR2841802A1 (fr) | 2004-01-09 |
FR2841802B1 (fr) | 2005-03-04 |
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