Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
  • A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
  • A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
  • A62D3/38—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by oxidation; by combustion
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
  • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
  • A62D2101/02—Chemical warfare substances, e.g. cholinesterase inhibitors
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
  • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
  • A62D2101/04—Pesticides, e.g. insecticides, herbicides, fungicides or nematocides
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
  • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
  • A62D2101/20—Organic substances
  • A62D2101/26—Organic substances containing nitrogen or phosphorus
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
  • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
  • A62D2101/20—Organic substances
  • A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen

Definitions

• the present invention relates to a composition intended for the decontamination of materials soiled by toxic agents, and more particularly a composition based on peracids ensuring the effective decontamination of materials soiled by toxic agents such as organophosphorus or organosulfur compounds, without causing degra ⁇ notable donations of said materials
• organophosphate cholinesterase inhibitor compounds such as organophosphates, amidophosphates, organoamidophosphates, phosphorothionates, phosphonothionates and phosphoroamidothionates, can be used in the field of agriculture as insecticides and pesticides.
• organosulfur compounds are known as vesicants and used as toxic agents of war.
• organophosphorus compounds used as pesticides or insecticides in agriculture there may be mentioned in particular O, O-diethyl-O-p-nitrophenyl phosphate
• compositions currently used in the decontamination technique are sodium hydroxide solutions in ethyl glycol with diethylamine, or calcium hypochlorite, but these solutions are very corrosive.
• nucleophilic compounds have the qualities required to remove toxins from the organophosphate and organosulfur series.
• C.A. Bunton et al., L7. AT . Chem. Soc. 95, 2912 (1973) have demonstrated the properties of the hydroxyl ion for this purpose; other reagents have also been proposed, including hydroxic acids, oximes, mono- and polyphenols, aldehyde hydrates, certain amines, as well as calcium or sodium hypochlorites.
• peroxyanions such as hydrogen peroxide, tert-butyl hydroperoxide, perborates and peracids, due to their both nucleophilic and oxidizing properties.
• surfactants of the quaternary ammonium type accelerates the destruction of toxins by micellar catalysis. So the patent.
• compositions constituted by solutions containing linear peracids with a long carbon chain, of pH between 6 and 8, generally associated with surfactants such as cetyl trimethyl ammonium bromide, bromide of cetyl dimethyl hydroxyethyl-2 ammonium, cetyl methyl bis (hydroxyethyl-2) ammonium bromide or cetyl diaza-1,4 bicyclo (2.2.2) octyl ammonium bromide.
• surfactants such as cetyl trimethyl ammonium bromide, bromide of cetyl dimethyl hydroxyethyl-2 ammonium, cetyl methyl bis (hydroxyethyl-2) ammonium bromide or cetyl diaza-1,4 bicyclo (2.2.2) octyl ammonium bromide.
• Such compositions make it possible to destroy Paraoxon, VX and Yperite.
• the peracids used are not commercially available and the stability of the compositions is not satisfactory.
• the patent FR-A-2,676,368 describes aqueous compositions based on magnesium onoperoxyphthalate and of surface-active agent of the quaternary ammonium salt type, usable for the decontamination of materials soiled with certain neurotoxic agents, in particular VX, and vesicants such as Yperite.
• the present invention relates to a composition of ⁇ '/ e containing a peracid ⁇ t a surfactant, used sand for the decontamination of materials contaminated with toxic organophosphorus or organosulfur agents, comprising
• n is an integer between 3 and 8
• R x identical or different in each group -CHR ⁇ , is an alkyl group or a phenyl group
• R 2 has the same definition as R 1 # -
• the composition consists of an aqueous solution at buffered pH between 8 and 11, and preferably between 9 and 10.
• R x and R 2 preferably represent an alkyl group of 1 to 4 carbon atoms, and by ⁇ xer.ple an ethyl, ethyl or n-prepyl group.
• the imidoperacid of general formula (I) can be for example phthalimidoperpropionic or phthalimidoperpropoic acid.
• the diperacid of general formula (II) can be chosen from, for example, perdidecanoic, perdinonanoic, and perdidodecanoic acids.
• the peracids used in the invention are products available commercially or the preparation of which can be carried out easily by usual techniques, by the action of hydrogen peroxide in an acid medium (for example in cold concentrated sulfuric acid medium) on the corresponding acids.
• a method for preparing such peracids is described by C. Lion et al. Bull. Soc. Chim. Belg. J2 (2) 127 (1990).
• the cationic surfactant of the quaternary ammonium type is preferably represented by the general formula (III):
• R 1 R 2 and R 3 , identical or different, represent an alkyl or hydroxyalkyl group of 1 to 4 carbon atoms
• R 4 represents a linear or branched alkyl group of 11 to 13 carbon atoms
• X represents a halogen or a hydroxyl radical.
• surfactants represented by the general formula (III) above preferably uses those for which R 1r R 2 and R represent an xethyl group, an ethyl group or a hydroxyethyl group, R. represents a cetyl group, and X is chlorine, bromine has a radical - C'A.
• the surfactant of general formula (III) is chosen from bromide or cetyl trimethyl ammonium chloride, cetyl dimethyl hydroxyethyl-2-ammonium bromide, bromide of cetyl ethyl bis (2-hydroxyethyl) ammonium or cetyl diaza-1,4 bicyclo (2.2.2) octyl ammonium bromide.
• surfactants are known and, for the most part, commercially available. They can be prepared by the methods described by C.A. Bunton et al. (cited above) and by L. Horner et al. , Phosohorus and Sulfur. H, 339 (1981).
• cetyl dimethyl hydroxyethyl-2-ammonium bromide can be obtained by refluxing a solution of hexadecyl bromide and dimethylethanolamine in a mixture of acetonitrile and methanol and by recrystallizing the crystals obtained from methanol.
• the composition according to the invention is preferably in the form of a buffered aqueous solution, of pH between 8 and 11, preferably between 9 and 10, for example an aqueous solution of a mixture of baking soda and sodium bicarbonate.
• This aqueous solution is applied to the material to be decontaminated, by spraying, spraying or simple washing, or it is possible to soak the materials in a tank containing a composition according to the invention.
• the peracid and the surfactant of the quaternary ammonium type when X is a hydroxyl, can be combined within the same molecule, to form a tetraalkylammonium percarboxylate.
• Such a CCM can be obtained by the action of the peracid of formula ( ⁇ ) or (II) on a tetraalkylammonium hydroxide, in stoichiometric amounts.
• This variant is particularly advantageous because the percarboxylate can be generated in situ, and thus occurs in aqueous solution, without the need to use a carbonate buffer which is replaced here by 1 * tetraalkylammonium hydroxide.
• Tetraalkylammonium hydroxide can be prepared using the method described by L. Sepulveda et al., J. Phys. ⁇ hem. , 89, 5322 (1985), from carbon sulphide and sodium ethylate, and action of a tetraalkylammonium bromide in sulfuric medium, then treatment with a base such as 1 barium hydroxide.
• compositions according to the invention for the decontamination of materials soiled with toxic organophosphorus or organosulfur compounds was verified by making them act on known compounds such as O, O-diethyl-Op-nitrophenyl phosphate (Paraoxon), in the series of organophosphorus compounds, and 2-phenyl-2 '-chlorodiethyl sulfide, analog of Yperite, in the series of organo ⁇ sulfur.
• compositions of the invention cause the destruction of compounds such as Paraoxon and the analogue of Yperite almost instantaneously.
• This result is obtained with the composition containing the peracid of formula (I) or (II) in combination with the surfactant of the quaternary ammonium type, as well as with the composition cc ⁇ tenar.t a tetraalkylammonium percarboxylate.
• the composition of the invention has excellent stability over time, unlike
• LOCATION SHEET (RULE 26 to conventional compositions based on peracids, and is not aggressive with respect to the various materials currently treated.
• compositions according to the invention comprising either a combination of peracid and surfactant (Example 1), or a percarboxylate tetraalkylammonium (Example 2).
• the destruction kinetics are carried out for Paraoxon according to a usual technique, in UV spectroscopy at 402 nm, corresponding to the maximum absorption of the p-nitrophenate ion released, at 25 ° C.
• the destruction rates of the analog, of the abovementioned Yperite are determined by chromatographic analysis at regular intervals, after addition of a mineral (ferrous sulfate) or organic (triphenylphosphine) reducing agent. We operate at a pH of.
• Table 1 below indicates the half-reaction time (in s.), At 25 ° C., per action of each of the four peracids indicated below, in 2.10 " M solution at pH 9, on the Paraoxon (5.10 "5 M).
• the surfactants used in combination with the above peracids are:
• cetyl chloride tri ⁇ .ethyl ammonium 6.
• cetyl brirride trirr.ethyl ammonium cetyl dimethyl hydroxyethyl-2-ammonium bromide cetyl methyl bis (hydroxyethyl-2) ammonium bromide cetyl diaza-1,4-bicyclo (2.2.2) octyl ammonium bromide
• composition according to the invention provides results equivalent to those obtained with magnesium monoperphthalate (MPPM) which is the best decontaminant currently known with respect to Paraoxon.
• MPPM magnesium monoperphthalate
• the compositions of the invention are also effective against organosulfur compounds.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Detergent Compositions (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9490179

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Family Cites Families (10)

• 1996
  • 1996-03-14 FR FR9603204A patent/FR2746020B1/fr not_active Expired - Fee Related
• 1997
  • 1997-02-13 EP EP97905197A patent/EP0848628B1/de not_active Expired - Lifetime
  • 1997-02-13 DE DE69721197T patent/DE69721197T2/de not_active Expired - Fee Related
  • 1997-02-13 CA CA002218079A patent/CA2218079A1/fr not_active Abandoned
  • 1997-02-13 IL IL12182497A patent/IL121824A/en not_active IP Right Cessation
  • 1997-02-13 US US08/952,398 patent/US6143088A/en not_active Expired - Fee Related
  • 1997-02-13 ES ES97905197T patent/ES2192666T3/es not_active Expired - Lifetime
  • 1997-02-13 WO PCT/FR1997/000274 patent/WO1997033655A1/fr not_active Ceased

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events