WO2021140304A1 - Système de décontamination chimique de gaz corrosifs - Google Patents
Système de décontamination chimique de gaz corrosifs Download PDFInfo
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- WO2021140304A1 WO2021140304A1 PCT/FR2021/050029 FR2021050029W WO2021140304A1 WO 2021140304 A1 WO2021140304 A1 WO 2021140304A1 FR 2021050029 W FR2021050029 W FR 2021050029W WO 2021140304 A1 WO2021140304 A1 WO 2021140304A1
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- 238000009390 chemical decontamination Methods 0.000 title description 8
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- XJRPTMORGOIMMI-UHFFFAOYSA-N ethyl 2-amino-4-(trifluoromethyl)-1,3-thiazole-5-carboxylate Chemical compound CCOC(=O)C=1SC(N)=NC=1C(F)(F)F XJRPTMORGOIMMI-UHFFFAOYSA-N 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- 150000008131 glucosides Chemical class 0.000 description 1
- 229940075529 glyceryl stearate Drugs 0.000 description 1
- PMMXXYHTOMKOAZ-UHFFFAOYSA-N hexadecyl 7-methyloctanoate Chemical compound CCCCCCCCCCCCCCCCOC(=O)CCCCCC(C)C PMMXXYHTOMKOAZ-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229910000043 hydrogen iodide Inorganic materials 0.000 description 1
- 125000001867 hydroperoxy group Chemical group [*]OO[H] 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- ZCTXEAQXZGPWFG-UHFFFAOYSA-N imidurea Chemical compound O=C1NC(=O)N(CO)C1NC(=O)NCNC(=O)NC1C(=O)NC(=O)N1CO ZCTXEAQXZGPWFG-UHFFFAOYSA-N 0.000 description 1
- KHLVKKOJDHCJMG-QDBORUFSSA-L indigo carmine Chemical compound [Na+].[Na+].N/1C2=CC=C(S([O-])(=O)=O)C=C2C(=O)C\1=C1/NC2=CC=C(S(=O)(=O)[O-])C=C2C1=O KHLVKKOJDHCJMG-QDBORUFSSA-L 0.000 description 1
- 229960003988 indigo carmine Drugs 0.000 description 1
- 239000004179 indigotine Substances 0.000 description 1
- 235000012738 indigotine Nutrition 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 description 1
- 229940070765 laurate Drugs 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- FDZZZRQASAIRJF-UHFFFAOYSA-M malachite green Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](C)C)C=C1 FDZZZRQASAIRJF-UHFFFAOYSA-M 0.000 description 1
- 229940107698 malachite green Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 1
- 229940012189 methyl orange Drugs 0.000 description 1
- 239000004292 methyl p-hydroxybenzoate Substances 0.000 description 1
- 235000010270 methyl p-hydroxybenzoate Nutrition 0.000 description 1
- CEQFOVLGLXCDCX-WUKNDPDISA-N methyl red Chemical compound C1=CC(N(C)C)=CC=C1\N=N\C1=CC=CC=C1C(O)=O CEQFOVLGLXCDCX-WUKNDPDISA-N 0.000 description 1
- 229960002216 methylparaben Drugs 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- BXWNKGSJHAJOGX-UHFFFAOYSA-N n-hexadecyl alcohol Natural products CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 1
- PGSADBUBUOPOJS-UHFFFAOYSA-N neutral red Chemical compound Cl.C1=C(C)C(N)=CC2=NC3=CC(N(C)C)=CC=C3N=C21 PGSADBUBUOPOJS-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 231100000616 occupational exposure limit Toxicity 0.000 description 1
- 229940066429 octoxynol Drugs 0.000 description 1
- 229920002113 octoxynol Polymers 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229960003531 phenolsulfonphthalein Drugs 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 229940114930 potassium stearate Drugs 0.000 description 1
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 description 1
- 239000004405 propyl p-hydroxybenzoate Substances 0.000 description 1
- 235000010232 propyl p-hydroxybenzoate Nutrition 0.000 description 1
- 229960004063 propylene glycol Drugs 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 229960003415 propylparaben Drugs 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 229940114926 stearate Drugs 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- PRZSXZWFJHEZBJ-UHFFFAOYSA-N thymol blue Chemical compound C1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3S(=O)(=O)O2)C=2C(=CC(O)=C(C(C)C)C=2)C)=C1C PRZSXZWFJHEZBJ-UHFFFAOYSA-N 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/304—Alkali metal compounds of sodium
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- B01D2252/204—Amines
- B01D2252/20494—Amino acids, their salts or derivatives
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- B01D2257/2022—Bromine
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- B01D2257/2045—Hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Definitions
- the invention relates to the field of chemical decontamination of an atmosphere. More specifically, it relates to the use of a composition comprising an acid-base neutralizing agent to decontaminate an atmosphere contaminated with a corrosive gas.
- the present invention also relates to a decontamination process comprising said composition.
- decontamination systems based on spraying in the air a solution of ozone, peracetic acid (WO2018143186) or peroxide of dry hydrogen (WO2019133801) can be used.
- chloro-oxidant solutions based on hypochlorite CIO ions or on hypochlorous acid HCIO have been developed for the decontamination of formaldehyde residues (WO2019150301).
- gaseous ozone made it possible to decontaminate combinations of firefighters contaminated by carcinogenic products resulting from combustion during a fire (WO 2019113434).
- polycyclic aromatic hydrocarbons such as benzo (a) pyrene
- solutions or Liquid dispersions based on cerium salts in water have been developed (WO2019112571).
- Physiological solutions based on complexed amphoteric agents have also been described for the decontamination of parts of the human or animal body contaminated by a corrosive or irritant product.
- the present invention relates to the use of a composition comprising at least one acid-base neutralizing agent for decontaminating an atmosphere contaminated by a corrosive gas, said acid-base neutralizing agent having at least 2 pKa and being characterized in that:
- corrosive gas is meant a gas causing corrosion on contact, that is to say an alteration of a material or alterations of the skin when it comes to living beings (irritations, chemical lesions for example) due to its acidic or basic nature.
- corrosive gas includes corrosive vapors emitted by certain liquid chemicals.
- the corrosive gases include acids and bases.
- Corrosive gases also include gaseous chemicals which on contact with moisture in the air or on the skin hydrolyze to acid or base, such as bromine (Br2) which hydrolyzes to hydrogen bromide ( HBr), a toxic and highly corrosive colorless gas.
- Corrosive gases also include volatile amines, such as ethanolamines such as for example triethanolamine and alkylamines such as for example diethylamine.
- Atmosphere is meant an atmosphere of a place capable of accommodating humans or animals such as, for example, a warehouse, a hangar, a building or a room.
- a contaminated atmosphere can occur in the event of a chemical accident with a gas leak or during leaks or spills of liquid chemicals emitting corrosive vapors. In such cases, the surrounding atmosphere becomes contaminated with these corrosive gases or vapors.
- the composition according to the invention makes it possible to decontaminate large volumes of atmosphere, as in the case of contamination of a room, warehouse or building.
- the composition is effective in treating a large gas flow to decontaminate such large atmospheres.
- a warehouse 1000 m 2 and 6 m high can be decontaminated in 5 min, at a rate of the treatment of 72,000 m 3 / h of air contaminated with the composition according to the invention.
- composition according to the invention allows decontamination without knowing the parameters of the contaminating gas in question (source of emission, concentration, flow rate, nature).
- decontamination is meant that the concentration of corrosive gas in the atmosphere has fallen to the threshold or below regulatory values for long-term exposure such as the occupational exposure limit values (OELP) defined by the European Union directives.
- OELP occupational exposure limit values
- the Directives 98/24 / EC, 2000/39 / EC, 2006/15 / EC, 2009/161 / EU, (EU) 2017/164, 2004/37 / EC, (EU) 2017/2398 can be cited. and (EU) 2019/130.
- the value of the regulatory threshold will depend on the nature of the gas.
- Table 1 below provides the exposure limit value not to be exceeded for an 8 hour exposure, for certain corrosive gases. These values have been defined by European or national directives.
- the concentration of corrosive gas in the atmosphere is lower or equal to 20 ppm, in particular less than or equal to 10 ppm, more particularly less than or equal to 5 ppm, still more particularly less than or equal to 1 ppm.
- decontamination is meant that the concentration of corrosive gas in the atmosphere has been reduced by at least 70%, in particular at least 90%, more particularly at least 95%.
- the decontamination can also be assessed by toxicological values by inhalation such as the Derived no effect level (DNEL) by inhalation over the long term.
- DNEL Derived no effect level
- Decontamination can also be assessed by a pH of the residues between 4 and 9, for example with a colored indicator or a pH meter.
- said acid-base neutralizing agent is a buffer solution and is characterized in that:
- said acid-base neutralizing agent is characterized in that:
- said acid-base neutralizing agent is an amphoteric agent.
- amphoteric agent is meant a chemical species having both the acid function and the basic function and consequently exhibiting at least two dissociation constants (pKa), one corresponding to the acid function and the other corresponding to the basic function.
- the amphoteric agent is selected from the group consisting of: an amino acid or a salt of an amino acid, a salt of citric acid, a salt of phosphoric acid, a salt of pyrophosphoric acid, a complexed or free salt of ethylenediaminetetraacetic acid (EDTA), a salt of ascorbic acid, or a carbonate.
- EDTA ethylenediaminetetraacetic acid
- amphoteric agent is a salt of ascorbic acid, for example sodium ascorbate.
- the amphoteric agent is an amino acid, for example L-alanine.
- the amphoteric agent is an EDTA salt, for example disodium EDTA.
- the amphoteric agent is an amino acid salt, more particularly a glutamate salt, for example sodium glutamate.
- the amphoteric agent is a carbonate, more particularly a hydrogencarbonate, in particular sodium hydrogencarbonate.
- the amphoteric agent is used at a concentration of at least 0.01 mol / L and within the solubility limit of the amphoteric agent.
- it is used at a concentration between 0.01 mol / L and 10 mol / L, in particular between 0.1 and 5 mol / L, more particularly between 0.1 and 2 mol / L, even more particularly at 1 mol / L or 0.5 mol / L.
- the composition contains two amphoteric agents, as defined above.
- the two amphoteric agents are a complexed EDTA salt such as a disodium EDTA-Aluminum complex, and an amino acid salt, more particularly a glutamate salt, for example sodium glutamate.
- said acid-base neutralizing agent is a mixture of at least one base conjugated with an acid and at least one acid conjugated with a base.
- the conjugate base and the conjugate acid are used at a concentration of at least 0.01 mol / L and within the limit of their solubility.
- they are used at a concentration of between 0.01 mol / L and 10 mol / L, in particular between 0.1 mol / L and 5 mol / L, more particularly 1 mol / L or 0.5 mol / L.
- said conjugated acid and said conjugated base are present in an equimolar ratio.
- said conjugate base is an EDTA-disodium aluminum complex and the conjugated acid is boric acid.
- EDTA-aluminum disodium complex a disodium salt of a complex based on aluminum and ethylenediaminetetraacetic acid having the general formula [Al (Y ) Bn] c'Dc with B representing OH-, BO 2 , H + , Y representing a tetracarboxylate which can be protonated four times to form ethylenediaminetetraacetic acid, n representing an integer equal to 0, 1, 2 or 3 , D being a counterion, preferably Na +, c being an integer equal to 2 and c 'being a relative number having the same absolute value as c.
- the acid-base neutralizing agent makes it possible to chelate ligands, in particular fluoride ions. Indeed, certain gases can release ions which have a toxic effect on the body. This is the case with fluoride ions, which may originate in particular from gaseous hydrogen fluoride, which bind to calcium or magnesium in the body during inhalation, and can thus cause a systemic disorder which can lead to cardiac arrest.
- fluoride ions which may originate in particular from gaseous hydrogen fluoride, which bind to calcium or magnesium in the body during inhalation, and can thus cause a systemic disorder which can lead to cardiac arrest.
- the neutralizing agent has electrophilic properties such that the fluoride ion F can attach itself to it.
- the bond between the electrophilic neutralizing agent and F must be stronger than that between F and Ca 2+ or F and Mg 2+ so that F binds preferably to the electrophilic neutralizing agent and not to the calcium or magnesium of the human body.
- a person skilled in the art knows how to easily select a neutralizing agent as defined above and having an electrophilic force allowing a bond with a fluoride ion stronger than that between a fluoride ion and Ca 2+ and that between a fluoride ion. and Mg 2+ .
- composition according to the present invention can comprise at least one additive chosen from surfactants, pH indicators, preservatives, and mixtures thereof. Those skilled in the art are able to choose, from among all of these optional additives, both the composition and the quantity of those which will be added to the composition, so that the latter retains all of its properties. .
- surfactant is understood to mean an agent making it possible to stabilize the composition or to allow it to be mixed with an organic solvent.
- the surfactant can be hydrophobic with an HLB of 3 to 10 or hydrophilic with an HLB of 11 to 18.
- the HLB (standing for "hydrophilic lipophilicity balance") of the surfactant or of the mixture of surfactants will be determined by Griffin's method (Griffin WC: Classification of Surf ace- Active Agents by 'HLB,' Journal of the Society of Cosmetic Chemists 1 (1949): 311. Griffin WC: Calculation of HLB Values of Non-lonic Surfactants, Journal of the Society of Cosmetic Chemists 5 (1954): 259).
- surfactants are ethoxylated fatty alcohols, fatty acids and esters (for example: ceteareth-12, ceteareth-20, ceteareth-33, stearyl cetyl alcohol 20-ethoxylated, 2-polyhydroxystearate polyglyceryl, glyceryl oleate, sorbitan ester, glycerol ester, PEG-mono / di-laurate, PEG-mono / di-stearate, cetearyl isononanoate, glyceryl stearate, etc.), carboxylates, ethoxycarboxylates (for example: sodium / potassium stearate , alkylcarboxylic acid, alkyl polyglycol ether carboxylic acid, polyglycol alkylphenol ether carboxylic acid, carboxymethyl alcohol, ethoxycarboxylate, ethercarboxylate, etc.), octoxynol, capryl caprilyl
- pH indicator agent is understood to mean a compound which has the capacity to change color as a function of the pH of its surrounding medium.
- pH indicator agents examples include thymol blue, tropaeolin, bromocresol purple, bromophenol blue, congo red, neutral red, phenolphthalein, thymolphthalein, alizarin yellow R, bromothymol blue, cresol red, methyl violet, malachite green, methyl yellow, congo red, methyl orange, bromocresol green, methyl red, phenol red, alizarin, indigo carmine and mixtures thereof.
- the term “preservative” is understood to mean an agent making it possible to limit the development of microorganisms within the composition. More particularly, they make it possible to stop or inhibit the growth of microorganisms.
- concentrations used are bacteriostatic.
- the combination of an antibacterial (ATB) with an antifungal (ATF) may be necessary.
- the addition of at least one preservative makes it possible to obtain a composition which does not allow the growth and multiplication of bacteria, fungi and / or molds.
- preservatives are the para-hydroxybenzoic alkyl ester, isothiazolinone, imidazolidinyl urea, diazolidinyl urea, methylparaben, propylparaben, propylene glycol, bromo-nitro-propanediol, phenoxyethanol , sorbic acid and its salts, benzoic acid and its salts, phenoxyethanol, benzyl alcohol, and mixtures thereof. These compounds are generally between 0.01% and 0.5% of the total weight of the composition.
- the composition can also be a sterile composition.
- a sterile composition can be obtained according to methods well known to those skilled in the art. It is then stored under sterile conditions until use.
- said composition is in the form of a solution, also called liquid.
- the composition can be in the form of an aqueous solution.
- said composition comprises from 20% to 99.9 %% water, more particularly from 60 to 95 %%, typically 75%.
- composition can also be in solution in an organic solvent.
- said composition comprises from 20 to 99.9% of organic solvent, more particularly from 60 to 95%, typically 75%.
- the organic solvent can be a fatty acid ester, a linear alkane, a cyclic alkane, a glycol ether, a glycol ether ester.
- said composition in the form of a solution is formulated in the form of a foam.
- said composition is in solid form.
- it can be in the form of solid particles, also called powder.
- the powder can be diluted in a neutral powder.
- said composition in solution form or in solid form can be formulated in aerosol form.
- the term “aerosol” is understood to mean that the composition is in the form of a colloid of liquid drops in suspension in a carrier gas or that it is in the form of a colloid of solid particles in suspension in a gas. vector.
- the carrier gas is a neutral gas such as nitrogen, air or compressed air.
- the composition according to the invention described above is sprayed directly into the atmosphere contaminated by corrosive gases.
- the present invention also relates to a method for decontaminating an atmosphere contaminated by a corrosive gas comprising the following steps:
- step 1) is initiated manually.
- step 1) is triggered automatically.
- Step 1) can be preceded by the detection of a gas in the atmosphere, in particular via a gas detection system.
- said acid-base neutralizing agent used in step 1) is characterized in that:
- said acid-base neutralizing agent used in step 1) is an amphoteric agent.
- the amphoteric agent is chosen from the group consisting of: an amino acid or a salt of an amino acid, a salt of citric acid, a salt of phosphoric acid, a salt of pyrophosphoric acid, a complexed or free salt of ethylenediaminetetraacetic acid (EDTA), a salt of ascorbic acid, or a carbonate.
- the amphoteric agent is a salt of ascorbic acid, for example sodium ascorbate.
- the amphoteric agent is an amino acid, for example L-alanine.
- the amphoteric agent is an EDTA salt, for example disodium EDTA.
- the amphoteric agent is an amino acid salt, more particularly a glutamate salt, for example sodium glutamate.
- the amphoteric agent is a carbonate, more particularly a hydrogencarbonate, in particular sodium hydrogencarbonate.
- the amphoteric agent is used at a concentration of at least 0.01 mol / L and within the solubility limit of the amphoteric agent. For example, it is used at a concentration between 0.01 mol / L and 10 mol / L, in particular between 0.1 and 5 mol / L, more particularly between 0.1 and 2 mol / L, even more particularly at 1 mol / L or 0.5 mol / L.
- the composition contains two amphoteric agents.
- the two amphoteric agents are a complexed EDTA salt such as a disodium EDTA-Aluminum complex, and an amino acid salt, more particularly a glutamate salt, for example sodium glutamate.
- said acid-base neutralizing agent used in step 1) is a mixture of at least one base conjugated with an acid and at least one acid conjugated with a base.
- the conjugate base and the conjugated acid are used at a concentration of at least 0.01 mol / L and within the limit of their solubility.
- they are used at a concentration of between 0.01 mol / L and 10 mol / L, in particular between 0.1 mol / L and 5 mol / L, more particularly 1 mol / L or 0.5 mol / L.
- said conjugated acid and said conjugated base are present in an equimolar ratio.
- said conjugate base is an EDTA-disodium aluminum complex and the conjugated acid is boric acid.
- the acid-base neutralizing agent used in step 1) has the ability to chelate ligands, in particular fluoride ions.
- composition used in step 1) can optionally contain at least one additive chosen from surfactants, pH indicators, preservatives, and mixtures thereof, as defined in the present application.
- the composition can also be a sterile composition, sterilized according to methods well known to those skilled in the art.
- the composition used in step 1) is in the form of a solution, such as an aqueous solution or in solution in an organic solvent.
- it can also be in solid form, in particular in powder form.
- the composition is sprayed in the form of a solution, in solid form, for example powder, in the form of a foam and / or in aerosol form.
- the composition can be sprayed using a sprinkler, also called a nozzle.
- composition can also be sprayed using an atomizing nozzle, which creates a mist.
- composition can also be sprayed using a spray.
- Step 2 is a decontamination verification step. For example, this can be carried out by measuring the concentration of contaminating gas (in ppm) in the atmosphere (gas detector), and / or by checking the pH of the residues. If the composition of the invention comprises a pH indicator, the pH verification of step 2) can be done visually using the colored indicators, and it is no longer necessary to measure the pH by another method such as pH. -metry or the use of a pH paper. A residue pH between 4 and 9 is an indicator of effective decontamination. [0104] Step 4) consists in recovering the solid or liquid residues.
- the residue is picked up with means commonly used by a person skilled in the art, for example using a shovel, a broom, a squeegee or by suction according to the solid or liquid state of the residue.
- means commonly used by a person skilled in the art for example using a shovel, a broom, a squeegee or by suction according to the solid or liquid state of the residue.
- a person skilled in the art knows how to adapt the collection means according to the nature of the residue.
- One of the advantages of the invention is therefore easy recovery of the decontamination residues using everyday utensils.
- composition according to the invention is that the residues resulting from the decontamination are at a pH between 4 and 9. They are therefore non-corrosive for contaminated premises and non-irritant and non-toxic for people. in charge of their recovery. Their elimination therefore does not require specific and expensive equipment.
- composition makes it possible to neutralize corrosive gases with the use of a minimum quantity of product and at a lower cost compared to products of the state of the art.
- composition of the present invention has the advantage of not being dangerous for living organisms: it is non-toxic, non-irritant, non-allergenic, and non-ecotoxic, unlike the products of the state of the art.
- rinsing of the decontaminated zone to remove the residues of the composition can be carried out as the last step.
- the present invention also relates to a device for decontaminating an atmosphere contaminated by a corrosive gas comprising at least one means capable of spraying 1 a composition comprising at least one acid-base neutralizing agent to decontaminate an atmosphere contaminated by a gas.
- a device for decontaminating an atmosphere contaminated by a corrosive gas comprising at least one means capable of spraying 1 a composition comprising at least one acid-base neutralizing agent to decontaminate an atmosphere contaminated by a gas.
- said acid-base neutralizing agent exhibiting at least 2 pKa and being characterized in that:
- At least one means one, two, three, four or more.
- composition is a composition as defined previously in the present application.
- the composition can be in liquid, solid or aerosol form.
- the means capable of spraying 1 the composition can be a spray, an atomizing nozzle, a foam generator or a sprinkler.
- the device comprises two reservoirs 3, each intended to receive the composition in a different form.
- the device therefore comprises two means capable of spraying 1 the composition, respectively adapted according to the form in which the composition is to be sprayed.
- the device comprises:
- a first reservoir intended to receive the composition in solid form, connected to a means suitable for spraying the composition in powder form, and
- a second reservoir intended to receive the composition in liquid form, connected to means suitable for spraying the composition in liquid or foam form.
- the device can be a portable device.
- portable we mean that the device can be moved by humans.
- the device can be a fixed device.
- fixed we mean that the device cannot be moved by humans. This is, for example, a device integrated into a building.
- said at least one spraying means 1 is connected to at least one circuit 2 comprising a fluid, said at least one at least one circuit 2 being itself connected to said at least one reservoir 3 intended to receive the composition, by means of a valve 4.
- This valve 4 located at the junction of the reservoir 3 and of the circuit 2, then allows the release of the composition in the circuit, then its spraying through the spraying means 1.
- valve 4 also makes it possible to adjust the rate of release of the composition in a controlled amount.
- the composition is in liquid form and the fluid in the circuit is a liquid, in particular water or water comprising an antifreeze product.
- the composition is in solid form, in particular in powder form, and the fluid in the circuit is a liquid, in particular water or water comprising an antifreeze product.
- the composition is in solid form, in particular in powder form, and the fluid in the circuit is a gas, in particular an inert gas such as nitrogen, air or water. 'pressurized air.
- the composition is in aerosol form and the fluid in the circuit is a gas, in particular an inert gas such as nitrogen, air or compressed air.
- circuit 2 is a circuit belonging to a fire extinguishing installation.
- the tank 3 is directly connected to the circuit of a fire extinguishing installation.
- This fire extinguishing installation may be pre-existing in the structure in which the fixed device according to the present application is installed.
- the decontamination device comprises at least one reservoir (3) connected to at least one circuit (2) comprising a fluid, said at least one circuit (2) being a circuit belonging to a fire extinguishing installation.
- said valve 4 is coupled to a gas detection system 5, in particular via a control automaton 6. This allows automatic actuation thereof.
- a compartment is provided between the reservoir 3 and the valve 4. This compartment is intended to receive on the one hand the fluid coming from the circuit 2 and on the other hand the composition coming from the reservoir 3. , before release into circuit 2. [0128] When the composition is in liquid form, this compartment makes it possible to dilute the composition before release into circuit 2.
- composition when said composition is in solid form, for example in powder form, the dissolution or dilution of said composition then takes place in said compartment, prior to its release into circuit 2.
- the presence of this compartment is optional, the composition, in solid or liquid form, can also be directly released into circuit 2.
- FIG. 1 Examples of devices are presented in FIG. 1 and Fig. 2. Brief description of the figures Fig. 1
- FIG. 1 shows a device for decontaminating an atmosphere comprising sprinklers 1 connected to a water circuit 2, itself being connected via a valve 4, to a reservoir 3 capable of receiving a composition in aqueous form, said valve 4 being coupled to a gas detection system 5 via a control automaton 6, for automatic actuation.
- FIG. 2 shows a device for decontaminating an atmosphere comprising sprinklers 1 connected to the water circuit 2, itself being connected via a valve 4 to a reservoir 3 capable of receiving a composition in solid form, via a valve 4 located at the junction of the reservoir 3 and the water circuit 2, said valve 4 being coupled to a system for detecting gas 5 via a control automaton 6, for automatic actuation.
- FIG. 3 is a graph showing the evolution of the gaseous HCl concentration (ppm) as a function of the volume (mL) sprayed of a composition comprising a complex of EDTA-aluminum disodium and boric acid in an equimolar mixture at 0 , 1 mol / L.
- FIG. 4 is a graph showing the evolution of the gaseous HCl concentration (ppm) as a function of the volume (mL) sprayed of a composition comprising a complex of disodium EDTA-Aluminum and sodium glutamate in an equimolar mixture at 0, 5 mol / L.
- FIG. 5 is a graph showing the evolution of the gaseous NH3 concentration (ppm) as a function of the volume (mL) sprayed of a composition comprising a complex of disodium EDTA-Aluminum and sodium glutamate in an equimolar mixture at 0, 5 mol / L.
- An aqueous chemical decontamination composition comprising, as neutralizing agent, the following mixture:
- Figure 3 shows the change in the concentration of gaseous HCL as a function of the volume of the composition sprayed into the atmosphere.
- the pH of the falling liquid residue is 4, that is to say not very acidic and not corrosive.
- An aqueous chemical decontamination composition comprising, as neutralizing agent an amphoteric agent, sodium glutamate at a concentration of 1mol / L and whose pKa are 4.15 and 9.58. This composition is sprayed in an atmosphere contaminated with a corrosive acid, such as hydrogen chloride.
- a corrosive acid such as hydrogen chloride.
- An aqueous chemical decontamination composition comprising, as neutralizing agent, the following mixture: a conjugate base of an acid: EDTA-disodium aluminum complex whose pKa is 5.87 at a concentration of 0 , 5 mol / L, and
- the conjugated acid of a base sodium glutamate with a pKa of 9.67 at a concentration of 0.5 mol / L.
- This composition is sprayed via a pump in an atmosphere contaminated with gaseous HCl, a corrosive acid, manually in an aerosol using a spray with a flow rate of approximately 375 ml / min.
- Figure 4 shows the change in the concentration of gaseous HCl as a function of the volume of the composition sprayed into the atmosphere.
- the pH of the falling liquid residue is 7, that is to say a neutral and non-corrosive liquid.
- An aqueous chemical decontamination composition comprising, as neutralizing agent, the following mixture: a conjugate base of an acid: EDTA-disodium aluminum complex whose pKa is 5.87 at a concentration of 0 , 5 mol / L, and
- This composition is sprayed via a pump in an atmosphere contaminated with gaseous NH3, a corrosive base, manually in an aerosol with a spray with a flow rate of approximately 375 ml / min.
- Figure 5 shows the change in the concentration of gaseous NH3 as a function of the volume of the composition sprayed into the atmosphere.
- the pH of the falling liquid residue is between 7 and 8, that is to say a neutral and non-corrosive liquid.
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- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
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Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2022008541A MX2022008541A (es) | 2020-01-10 | 2021-01-08 | Sistema para la descontaminación química de gases corrosivos. |
AU2021206574A AU2021206574A1 (en) | 2020-01-10 | 2021-01-08 | System for chemical decontamination of corrosive gases |
CA3164299A CA3164299A1 (fr) | 2020-01-10 | 2021-01-08 | Systeme de decontamination chimique de gaz corrosifs |
EP21704851.1A EP4087673A1 (fr) | 2020-01-10 | 2021-01-08 | Système de décontamination chimique de gaz corrosifs |
BR112022013502A BR112022013502A2 (pt) | 2020-01-10 | 2021-01-08 | Uso de uma composição, processo e dispositivo de descontaminação de uma atmosfera contaminada por um gás corrosivo |
US17/791,774 US11839850B2 (en) | 2020-01-10 | 2021-01-08 | System for the chemical decontamination of corrosive gases |
CN202180012921.8A CN115087493A (zh) | 2020-01-10 | 2021-01-08 | 用于化学净化腐蚀性气体的系统 |
US18/357,285 US20230364556A1 (en) | 2020-01-10 | 2023-07-24 | System for the chemical decontamination of corrosive gases |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FRFR2000212 | 2020-01-10 | ||
FR2000212A FR3106063B1 (fr) | 2020-01-10 | 2020-01-10 | Système de décontamination chimique de gaz corrosifs |
Related Child Applications (2)
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US17/791,774 A-371-Of-International US11839850B2 (en) | 2020-01-10 | 2021-01-08 | System for the chemical decontamination of corrosive gases |
US18/357,285 Continuation US20230364556A1 (en) | 2020-01-10 | 2023-07-24 | System for the chemical decontamination of corrosive gases |
Publications (1)
Publication Number | Publication Date |
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WO2021140304A1 true WO2021140304A1 (fr) | 2021-07-15 |
Family
ID=70295322
Family Applications (1)
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PCT/FR2021/050029 WO2021140304A1 (fr) | 2020-01-10 | 2021-01-08 | Système de décontamination chimique de gaz corrosifs |
Country Status (10)
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US (2) | US11839850B2 (fr) |
EP (1) | EP4087673A1 (fr) |
CN (1) | CN115087493A (fr) |
AU (1) | AU2021206574A1 (fr) |
BR (1) | BR112022013502A2 (fr) |
CA (1) | CA3164299A1 (fr) |
CL (1) | CL2022001859A1 (fr) |
FR (1) | FR3106063B1 (fr) |
MX (1) | MX2022008541A (fr) |
WO (1) | WO2021140304A1 (fr) |
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- 2021-01-08 CN CN202180012921.8A patent/CN115087493A/zh active Pending
- 2021-01-08 US US17/791,774 patent/US11839850B2/en active Active
- 2021-01-08 EP EP21704851.1A patent/EP4087673A1/fr active Pending
- 2021-01-08 BR BR112022013502A patent/BR112022013502A2/pt unknown
- 2021-01-08 WO PCT/FR2021/050029 patent/WO2021140304A1/fr unknown
- 2021-01-08 MX MX2022008541A patent/MX2022008541A/es unknown
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Also Published As
Publication number | Publication date |
---|---|
FR3106063A1 (fr) | 2021-07-16 |
BR112022013502A2 (pt) | 2022-09-13 |
US11839850B2 (en) | 2023-12-12 |
EP4087673A1 (fr) | 2022-11-16 |
AU2021206574A1 (en) | 2022-08-04 |
CL2022001859A1 (es) | 2023-03-31 |
FR3106063B1 (fr) | 2022-06-10 |
MX2022008541A (es) | 2022-10-18 |
CN115087493A (zh) | 2022-09-20 |
US20230364556A1 (en) | 2023-11-16 |
CA3164299A1 (fr) | 2021-07-15 |
US20230043563A1 (en) | 2023-02-09 |
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