WO2007048885A1 - Additive for javelle water - Google Patents

Additive for javelle water Download PDF

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Publication number
WO2007048885A1
WO2007048885A1 PCT/FR2005/002691 FR2005002691W WO2007048885A1 WO 2007048885 A1 WO2007048885 A1 WO 2007048885A1 FR 2005002691 W FR2005002691 W FR 2005002691W WO 2007048885 A1 WO2007048885 A1 WO 2007048885A1
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WO
WIPO (PCT)
Prior art keywords
water
bleach
additive
monosodium phosphate
anhydrous monosodium
Prior art date
Application number
PCT/FR2005/002691
Other languages
French (fr)
Inventor
Dominique Mercier
Original Assignee
Dominique Mercier
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dominique Mercier filed Critical Dominique Mercier
Priority to PCT/FR2005/002691 priority Critical patent/WO2007048885A1/en
Priority to PCT/FR2006/002423 priority patent/WO2007048941A2/en
Publication of WO2007048885A1 publication Critical patent/WO2007048885A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/26—Phosphorus; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/08—Corrosion inhibition
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness
    • C02F5/04—Softening water by precipitation of the hardness using phosphates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/083—Mineral agents

Definitions

  • the present invention relates to a chemical additive with bleach and / or bleached water to enhance the disinfecting activity in water while providing anti-scaling and anti-corrosion properties.
  • the waters conveyed and used in domestic, technical, agricultural or industrial installations may be contaminated by corrosions, mineral deposits, bacteria, viruses, fungi and algae, the latter finding food and shelter thanks to the former.
  • These products, deposits and contaminations can be the cause of serious disorders and may, in the case of water intended for domestic use, affect the health of users.
  • the applicant proposes a chemical additive to bleach and / or bleached water to enhance the desired disinfectant action while providing anti-scale and anti-corrosion properties to treated water.
  • the bleach contains soda necessary for its stability. It is known to one skilled in the art that when bleach is added to the water to be treated, the sodium hypochlorite reacts rapidly to form hypochlorous acid and the HOCl balance ⁇ ⁇ t + OCT is a function of the pH of the water. Thus, an increase in pH shifts the equilibrium to the right and thus decreases the amount of the HOCl (hypochlorous acid) species.
  • the disinfecting properties of bleach are due mainly to the bactericidal power of hypochlorous acid that diffuses through the cell wall of bacteria by destroying membrane proteins.
  • HClO acts on the synthesis metabolism of bacteria. Unloaded HClO is nearly 100 times more bactericidal than the hypochlorite ion. In the case of HClO viruses would act by attacking the amidated bonds of the proteins.
  • the bleaching water added with a chemical reagent must remain usable in water treatment or drinking water treatment in water for agricultural irrigation and finally in water treatment used and conveyed in technical networks.
  • the additive For drinking or drinking water and water for agricultural use, the additive must be compatible with their sanitary or indirect food uses.
  • treated water For agricultural or technical waters, treated water must be able to be used and discharged without any risk to the environment.
  • the present invention relates to the use of anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form as a chemical additive to bleach and / or bleached water.
  • the present invention relates to the use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water, the anhydrous monosodium phosphate being dissolved in aqueous solution beforehand. to his addition.
  • the present invention relates to a use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as chemical additive to bleach and / or bleached water in which the addition of anhydrous monosodium phosphate is carried out in amount such that the molar ratio ([NaH 2 PO 4 ] added) / ([NaOH] initially contained in the bleach or the bleached water) is ⁇ 2 and preferably ⁇ 3.
  • this The invention relates to a use of anhydrous monosodium phosphate of the formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water in which the bleach and additive mixture is blended at the same time. use and before mixing in the water to be treated.
  • the present invention relates to a use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water in which the mixture of bleach and the additive is introduced as such into the water to be treated.
  • the present invention relates to a use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water in which the bleach and the additive are introduced separately into the water to be treated.
  • the present invention relates to the application to water treatment of the previous uses.
  • the anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form or diluted in aqueous solution added to the bleach or to chlorinated water in certain proportions makes it possible to obtain the desired characteristics and compatibilities of use.
  • the anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form or diluted in aqueous solution will be added by mixing with the latter during its use either before mixing in the water to be treated, or mixed in the water to be treated.
  • the bleaching of the bleach and anhydrous monosodium phosphate in solid form or diluted in aqueous solution should preferably be carried out before mixing with the water to be treated during use.
  • anhydrous monosodium phosphate of formula NaH 2 PO 4 increases its disinfection power by conferring a near neutral pH and inhibiting characteristics of corrosion and scaling.
  • the anhydrous monosodium phosphate is mixed with bleach or bleach in a proportion such that the molar ratio NaH 2 PO 4 / (NaOH) ⁇ 2 and preferably less than 3.
  • the first term Na H 2 PO 4 corresponds to the amount of anhydrous monosodium phosphate added
  • the second term NaOH corresponds to the amount of sodium hydroxide initially contained in the bleach water.
  • the anhydrous monosodium phosphate reacts partly with the totality of the soda contained initially in the bleach water according to the reaction:
  • the salt obtained is a sodium hydrogenosaldehyde phosphate disodium, its chemical formula contains atoms of the hydrogen element likely to have the desired acidobasic reactions for the inhibition of scaling and corrosion reactions.
  • the above reaction is at a molar ratio of NaH 2 PO 4 to NaOH of 1.
  • the pKa of disodium hydrogen phosphate is 7.2. If one remains at such a ratio, the pH of the solution thus formed remained substantially high. The fraction of sodium dihydrogenphosphate formed and which has not reacted with sodium hydroxide makes it possible to lower the pH of the solution. In fact, since the pKa of disodium dinhydrogenphosphate is 2.15, it brings an acidification proportional to its concentration in the solution. For example, during a direct addition in bleach in a Na H 2 PO 4 / (NaOH) molar ratio equal to 2.6, the pH of the solution will have a value substantially of 7.2 compatible with water. safe use of the solution in view of its stability in particular
  • the disodium dihydrogenphosphate salt is also a sodium hydrogenosal, its chemical formula contains atoms of the hydrogen element likely to have the acidobasic reactions sought for the inhibition of scaling and corrosion reactions.
  • the phosphate anhydrous md ⁇ ôs ⁇ dfqué may be mixed with water before mixing with the bleach or bleach.
  • Such an arrangement allows easier dosing when mixing the products and during their implementation.
  • the addition of anhydrous monosodium phosphate in solid form or in the form of an aqueous solution of disodium dihydrogenphosphate in a molar ratio NaH 2 PO 4 / (NaOH) ⁇ 2 and preferably less than 3 makes it possible to substantially lower the pH of the solution thus formed and to promote the formation of a large quantity of hypochlorous acid in the mixture thus formed.
  • a bleach and or bleached waters thus packaged have a disinfecting activity greatly increased compared to a bleach alone or simply bleached water.
  • the sodium hydrogenosalts present in the bleach and / or the bleached waters thus packaged provide the inhibiting characteristics of scaling and corrosion sought in conjunction with the disinfection of water for the protection of the installations which convey them and for their actions at the site. look at the deposits that can form there.
  • a non-foaming detergent effect of the bleaching water thus packaged can be sought in particular during the treatment of cooling water circuit waters and cooling water. According to the applicant's experience, such an effect is obtained by the addition of polyglycolic ether of fatty alcohol.
  • This nonionic surfactant can be added in solid form (powder) or in liquid form during the preparation of the additive and this in a volume of 1 to 5% of the volume of bleach thus conditioned.
  • a detergent and foaming effect of the bleach thus packaged can be sought especially during the disinfection of surfaces.
  • such effects are obtained by the joint addition of polyglycolic fatty ether (volume of 1 to 5% of the volume of bleach thus conditioned) and of a mixture (volume of 1 to 5 % of the volume of bleach thus conditioned) of sodium olefinsulfonate and sodium salt of a secondary alkanesulfonate.
  • the bleach and or bleached waters thus conditioned find their main applications in the potabilisation of water, the treatment of drinking water contaminated or likely to be (curative, preventive) , water intended for agricultural irrigation, water circuits cooling circuits, cooling circuits, fire networks, industrial processes and the protection of facilities that contain them.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Agronomy & Crop Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

The invention relates to the use of anhydrous monosodium phosphate having formula NaH2PO4 as a chemical additive for Javelle water and/or water chlorinated with Javelle water in order to strengthen the disinfectant activity thereof in water and to provide scale preventive and anticorrosive properties.

Description

ADDITIF POUR EAU DE JAVEL ADDITIVE FOR BLEACHING WATER
La présente invention concerne un additif chimique à l'eau de javel et ou aux eaux javellisées permettant de renforcer l'activité désinfectante dans l'eau tout en apportant des propriétés antitartre et anticorrosion.The present invention relates to a chemical additive with bleach and / or bleached water to enhance the disinfecting activity in water while providing anti-scaling and anti-corrosion properties.
Les eaux véhiculées et ou utilisées dans les installations domestiques, techniques, agricoles ou industrielles peuvent être souillées par des produits de corrosions, des dépôts minéraux, des bactéries, virus, champignons et algues, ces derniers trouvant nourriture et refuge grâce aux premiers. Ces produits, dépôts et contaminations peuvent être à l'origine de désordres graves et peuvent, dans le cas d'eaux destinées à un usage domestique, porter atteinte à la santé des utilisateurs. II existe de nombreux produits chimiques susceptibles d'inhiber les réactions de corrosions et ou d'entartrage ainsi que de nombreux produits chimiques permettant de désinfecter ces eaux. En ce on trouve notamment les phosphates, les silicates, le chlore et ses dérivés, l'ozone, des ammoniums, le peroxyde d'hydrogène, l'iode, le brome etc.. Ces produits ne sont pas toujours compatibles et à la connaissance du demandeur, il n'existait pas à ce jour un produit de traitement des eaux susceptible d'être à la fois désinfectant et inhibiteur d'entartrage et de corrosion.The waters conveyed and used in domestic, technical, agricultural or industrial installations may be contaminated by corrosions, mineral deposits, bacteria, viruses, fungi and algae, the latter finding food and shelter thanks to the former. These products, deposits and contaminations can be the cause of serious disorders and may, in the case of water intended for domestic use, affect the health of users. There are many chemicals that can inhibit corrosive and / or scaling reactions as well as many chemicals that disinfect these waters. In this we find phosphates, silicates, chlorine and its derivatives, ozone, ammoniums, hydrogen peroxide, iodine, bromine etc. These products are not always compatible and to the knowledge of the applicant, there was not so far a water treatment product that could be both disinfectant and inhibitor of scaling and corrosion.
Suivant l'objet de l'invention, le demandeur propose un additif chimique à l'eau de javel et ou aux eaux javellisées permettant de renforcer l'action désinfectante recherchée tout en apportant des propriétés antitartre et anticorrosion aux eaux traitées.According to the subject of the invention, the applicant proposes a chemical additive to bleach and / or bleached water to enhance the desired disinfectant action while providing anti-scale and anti-corrosion properties to treated water.
L'eau de javel contient de la soude nécessaire à sa stabilité. Il est connu de l'homme de l'art que lors de l'ajout de l'eau de javel dans l'eau à traiter, Fhypochlorite de sodium réagi rapidement pour former de l'acide hypochloreux et que l'équilibre HOCl <→Εt + OCT est fonction du pH de l'eau. Ainsi, une augmentation du pH déplace l'équilibre vers la droite et diminue donc la quantité de l'espèce HOCl (acide hypochloreux).The bleach contains soda necessary for its stability. It is known to one skilled in the art that when bleach is added to the water to be treated, the sodium hypochlorite reacts rapidly to form hypochlorous acid and the HOCl balance <→ Εt + OCT is a function of the pH of the water. Thus, an increase in pH shifts the equilibrium to the right and thus decreases the amount of the HOCl (hypochlorous acid) species.
L'ajout d'eau de javel dans de l'eau augmente le pH de cette dernière proportionnellement à la quantité d'eau de javel introduite du fait de la présence de soude dans ladite eau de javel.The addition of bleach in water increases the pH of the latter in proportion to the amount of bleach introduced because of the presence of soda in said bleach.
Les propriétés désinfectantes de l'eau de javel sont dues principalement au pouvoir bactéricide de l'acide hypochloreux qui diffuse au travers de la paroi des cellules des bactéries en détruisant des protéines membranaires. Par ailleurs HClO agit sur le métabolisme de synthèse des bactéries. HClO non chargé, est prés de 100 fois plus bactéricide que l'ion hypochlorite. Dans le cas des virus HClO agirait par attaque des liaisons amidées des protéines.The disinfecting properties of bleach are due mainly to the bactericidal power of hypochlorous acid that diffuses through the cell wall of bacteria by destroying membrane proteins. Moreover, HClO acts on the synthesis metabolism of bacteria. Unloaded HClO is nearly 100 times more bactericidal than the hypochlorite ion. In the case of HClO viruses would act by attacking the amidated bonds of the proteins.
Il serait donc utile de pouvoir favoriser, voir augmenter la fraction de chlore actif dans l'eau additionnée de l'eau de javel. Il est connu de l'homme de l'art que les eaux javellisées sont corrosives. De même il est connu de l'homme de l'art qu'une eau dure sera d'autant plus eritâffiaήté φëTâjôïïfd'éali dejavel s¥ralmpdrtaήr(présèncë dë s~oïïdë)rIt would therefore be useful to be able to promote or even increase the fraction of active chlorine in water added with bleach. It is known to those skilled in the art that bleached water is corrosive. Similarly it is known to the skilled artisan that hard water will be more eritâffiaήté φëTâjôïïfd'éali dejavel ¥ s ralmpdrtaήr (presence of S ~ oïïdë) r
II est connu de l'homme de l'art et en particulier du demandeur que l'ajout d'un acide fort à l'eau de javel permet d'abaisser son pH cependant cela n'est pas sans risque et une erreur de dosage peut entraîner la formation de dichlore sous forme gazeuse dangereuse pour l'opérateur.It is known to those skilled in the art and in particular the applicant that the addition of a strong acid bleach can lower its pH however it is not without risk and a mistake of Dosing may result in the formation of gaseous dichlor gas, which is dangerous for the operator.
Suivant l'objet de l'invention, l'eau de javel additionnée d'un réactif chimique doit demeurer utilisable en traitement des eaux potables ou à potabiliser, en traitement des eaux destinées à l'irrigation agricole et enfin en traitement d'eaux utilisées et véhiculées dans des réseaux techniques. Pour les eaux potables ou à potabiliser et les eaux à usages agricoles, l'additif doit être compatible avec leurs usages sanitaires ou indirectement alimentaires. Pour les eaux à usages agricoles ou techniques,les eaux traitées doivent pouvoir êtres utilisées et rejetées sans risques pour Y environnement.According to the subject of the invention, the bleaching water added with a chemical reagent must remain usable in water treatment or drinking water treatment in water for agricultural irrigation and finally in water treatment used and conveyed in technical networks. For drinking or drinking water and water for agricultural use, the additive must be compatible with their sanitary or indirect food uses. For agricultural or technical waters, treated water must be able to be used and discharged without any risk to the environment.
De même il est connu du demandeur, que l'ajout d'un acide dans de l'eau de javel favorise son instabilité et diminue fortement sa durée de vie. Selon un premier aspect, la présente invention concerne l'utilisation de phosphate monosodique anhydre de formule NaH2PO4 sous forme solide comme additif chimique à de l'eau de javel et / ou à des eaux javellisées.Similarly, it is known to the applicant, that the addition of an acid in bleach promotes instability and greatly reduces its life. According to a first aspect, the present invention relates to the use of anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form as a chemical additive to bleach and / or bleached water.
Selon un autre aspect, la présente invention concerne l'utilisation de phosphate monosodique anhydre de formule NaH2 PO4 comme additif chimique à de l'eau de javel et / ou à des eaux javellisées, le phosphate monosodique anhydre étant dissous en solution aqueuse préalablement à son addition.According to another aspect, the present invention relates to the use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water, the anhydrous monosodium phosphate being dissolved in aqueous solution beforehand. to his addition.
Selon un autre aspect, la présente invention concerne une utilisation de phosphate monosodique anhydre de formule NaH2PO4 comme additif chimique à de l'eau de javel et / ou à des eaux javellisées dans laquelle l'ajout de phosphate monosodique anhydre est effectué en quantité telle que le rapport molaire ([Na H2 PO4] ajouté) / ([NaOH] initialement contenu dans l'eau de javel ou les eaux javellisées) soit ≥ 2 et de préférence ≤ 3. Selon un autre aspect, la présente invention concerne une utilisation de phosphate monosodique anhydre de formule NaH2 PO4 comme additif chimique à de l'eau de javel et / ou à des eaux javellisées dans laquelle le mélange de l'eau de javel et de l'additif est réalisé lors de l'usage et avant son mélange dans l'eau à traiter. Selon un autre aspect, la présente invention concerne une utilisation de phosphate monosodique anhydre de formule NaH2PO4 comme additif chimique à de l'eau de javel et / ou à des eaux javellisées dans laquelle le mélange de l'eau de javel et de l'additif est introduit tel quel dans l'eau à traiter. Selon un autre aspect, la présente invention concerne une utilisation de phosphate monosodique anhydre de formule NaH2PO4 comme additif chimique à de l'eau de javel et / ou à des eaux javellisées dans laquelle l'eau de javel et l'additif sont introduits séparément dans l'eau à traiter. Selon un autre aspect, la présente invention concerne l'application au traitement des eaux des précédentes utilisations.According to another aspect, the present invention relates to a use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as chemical additive to bleach and / or bleached water in which the addition of anhydrous monosodium phosphate is carried out in amount such that the molar ratio ([NaH 2 PO 4 ] added) / ([NaOH] initially contained in the bleach or the bleached water) is ≥ 2 and preferably ≤ 3. In another aspect, this The invention relates to a use of anhydrous monosodium phosphate of the formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water in which the bleach and additive mixture is blended at the same time. use and before mixing in the water to be treated. According to another aspect, the present invention relates to a use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water in which the mixture of bleach and the additive is introduced as such into the water to be treated. According to another aspect, the present invention relates to a use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or bleached water in which the bleach and the additive are introduced separately into the water to be treated. In another aspect, the present invention relates to the application to water treatment of the previous uses.
Suivant l'objet de l'invention, le phosphate monosodique anhydre de formule NaH2PO4 sous forme solide ou dilué en solution aqueuse ajouté à l'eau de javel ou à des eaux javellisées dans des proportions déterminées permet d'obtenir les caractéristiques et compatibilités d'usage recherchées.According to the subject of the invention, the anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form or diluted in aqueous solution added to the bleach or to chlorinated water in certain proportions makes it possible to obtain the desired characteristics and compatibilities of use.
Suivant l'objet de l'invention, afin de ne pas augmenter l'instabilité de l'eau de javel, le phosphate monosodique anhydre de formule NaH2 PO4 sous forme solide ou dilué en solution aqueuse sera ajouté par mélange à cette dernière lors de son usage soit avant mélange dans l'eau à traiter, soit en mélange dans l'eau à traiter. Suivant l'expérience du demandeur, le mélange de l'eau de javel et du phosphate monosodique anhydre sous forme solide ou dilué en solution aqueuse doit être de préférence réalisé avant le mélange avec l'eau à traiter lors de l'usage.According to the subject of the invention, in order not to increase the instability of the bleach, the anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form or diluted in aqueous solution will be added by mixing with the latter during its use either before mixing in the water to be treated, or mixed in the water to be treated. According to the Applicant's experience, the bleaching of the bleach and anhydrous monosodium phosphate in solid form or diluted in aqueous solution should preferably be carried out before mixing with the water to be treated during use.
Suivant l'objet de l'invention, l'ajout de phosphate monosodique anhydre de formule NaH2 PO4 à de l'eau de javel ou à une eau javellisée augmente son pouvoir de désinfection en lui conférant un pH proche de la neutralité et des caractéristiques inhibitrices de la corrosion et de l'entartrage.According to the subject of the invention, the addition of anhydrous monosodium phosphate of formula NaH 2 PO 4 to bleach or to a bleached water increases its disinfection power by conferring a near neutral pH and inhibiting characteristics of corrosion and scaling.
Suivant l'objet de l'invention, le phosphate monosodique anhydre est mélangé à l'eau de javel ou de l'eau javellisée dans une proportion telle que le rapport molaire Na H2 PO4 / (Na HO ) ≥ 2 et de préférence inférieure à 3. Le premier terme Na H2PO4 correspond à la quantité de phosphate monosodique anhydre ajouté, le second terme NaOH correspond à la quantité de soude initialement contenue dans l'eau de javel.According to the subject of the invention, the anhydrous monosodium phosphate is mixed with bleach or bleach in a proportion such that the molar ratio NaH 2 PO 4 / (NaOH) ≥ 2 and preferably less than 3. The first term Na H 2 PO 4 corresponds to the amount of anhydrous monosodium phosphate added, the second term NaOH corresponds to the amount of sodium hydroxide initially contained in the bleach water.
Le phosphate monosodique anhydre réagit pour partie avec la totalité de la soude contenue initialement dans l'eau de javel suivant la réaction :The anhydrous monosodium phosphate reacts partly with the totality of the soda contained initially in the bleach water according to the reaction:
Na+ + H2PO4 "+ (Na+ + HO ')→ 2 Na+ + HPO4 2 ' + H2ONa + + H 2 PO 4 " + (Na + + HO ' ) → 2 Na + + HPO 4 2' + H 2 O
Le sel obtenu est un hydrogénosel de sodium, l'hydrogénophosphate de disodium, sa formule chimique renferme des atomes de l'élément hydrogène susceptibles d'avoir les réactions acidobasiques recherchées pour l'inhibition des réactions d'entartrage et de corrosion.The salt obtained is a sodium hydrogenosaldehyde phosphate disodium, its chemical formula contains atoms of the hydrogen element likely to have the desired acidobasic reactions for the inhibition of scaling and corrosion reactions.
La réaction ci dessus est à un rapport molaire entre Na H2PO4 et Na HO de 1.The above reaction is at a molar ratio of NaH 2 PO 4 to NaOH of 1.
Le pKa del'hydrogénophosphate de disodium est de 7,2. Si on demeure à un tel rapport, le pH de la solution ainsi formée demeura sensiblement élevé. La fraction de dihydrogénophosphate de sodium formée et qui n'a pas réagit avec la soude permet d'abaisser le pH de la solution. En effet, le pKa du dinydrogénophosphate de disodium étant de 2,15 , il apporte une acidification proportionnelle à sa concentration dans la solution. Par exemple, lors d'un ajout direct dans l'eau de javel dans un rapport molaire Na H2 PO4 / (Na HO ) égal à 2,6 le pH de la solution aura une valeur sensiblement de 7,2 compatible avec l'usage en toute sécurité de la solution au regard de sa stabilité notammentThe pKa of disodium hydrogen phosphate is 7.2. If one remains at such a ratio, the pH of the solution thus formed remained substantially high. The fraction of sodium dihydrogenphosphate formed and which has not reacted with sodium hydroxide makes it possible to lower the pH of the solution. In fact, since the pKa of disodium dinhydrogenphosphate is 2.15, it brings an acidification proportional to its concentration in the solution. For example, during a direct addition in bleach in a Na H 2 PO 4 / (NaOH) molar ratio equal to 2.6, the pH of the solution will have a value substantially of 7.2 compatible with water. safe use of the solution in view of its stability in particular
Le sel de dihydrogénophosphate de disodium est aussi un hydrogénosel de sodium, sa formule chimique renferme des atomes de l'élément hydrogène susceptibles d'avoir les réactions acidobasiques recherchées pour Finhibition des réactions d'entartrage et de corrosion.The disodium dihydrogenphosphate salt is also a sodium hydrogenosal, its chemical formula contains atoms of the hydrogen element likely to have the acidobasic reactions sought for the inhibition of scaling and corrosion reactions.
— Suivant une variante'de l'invention, le phôsphate mdήôsόdfqué anhydre peut être mélangé à de l'eau avant son mélange avec l'eau de javel ou l'eau javellisée. Une telle disposition permet un dosage plus facile lors du mélange des produits et lors de leur mise en œuvre. Suivant l'objet de l'invention, l'ajout de phosphate monosodique anhydre sous forme solide ou sous forme d'une solution aqueuse de dihydrogénophosphate de disodium dans un rapport molaire Na H2PO4 / (Na HO ) ≥ 2 et de préférence inférieure à 3 permet d'abaisser sensiblement le pH de la solution ainsi formée et de favoriser la formation d'une quantité importante d'acide hypochloreux dans le mélange ainsi formé.- According to a variant 'of the invention, the phosphate anhydrous mdήôsόdfqué may be mixed with water before mixing with the bleach or bleach. Such an arrangement allows easier dosing when mixing the products and during their implementation. According to the subject of the invention, the addition of anhydrous monosodium phosphate in solid form or in the form of an aqueous solution of disodium dihydrogenphosphate in a molar ratio NaH 2 PO 4 / (NaOH) ≥ 2 and preferably less than 3 makes it possible to substantially lower the pH of the solution thus formed and to promote the formation of a large quantity of hypochlorous acid in the mixture thus formed.
Suivant l'objet de l'invention, une eau de javel et ou des eaux javellisées ainsi conditionnée ont une activité désinfectante fortement augmentée par rapport à une eau de javel seule ou une eau simplement javellisée. Les hydrogénosels de sodium présents dans l'eau de javel et ou les eaux javellisées ainsi conditionnées apportent les caractéristiques inhibitrices de l'entartrage et de la corrosion recherchées conjointement à la désinfection des eaux pour la protection des installations qui les véhiculent et pour leurs actions au regard des dépôts qui peuvent s'y former. Suivant l'objet de l'invention, un effet détergent non moussant de l'eau de javel ainsi conditionnée peut être recherché notamment lors du traitement des eaux de circuits aéroréfrigérants et des eaux de refroidissement. Suivant l'expérience du demandeur, un tel effet est obtenu par l'ajout d'éther polyglycolique d'alcool gras. Ce tensioactif non ionique pouvant être ajouté sous forme solide (poudre) ou sous forme liquide lors de la préparation de l'additif et ce dans un volume de 1 à 5% du volume d'eau de javel ainsi conditionnée.According to the subject of the invention, a bleach and or bleached waters thus packaged have a disinfecting activity greatly increased compared to a bleach alone or simply bleached water. The sodium hydrogenosalts present in the bleach and / or the bleached waters thus packaged provide the inhibiting characteristics of scaling and corrosion sought in conjunction with the disinfection of water for the protection of the installations which convey them and for their actions at the site. look at the deposits that can form there. According to the subject of the invention, a non-foaming detergent effect of the bleaching water thus packaged can be sought in particular during the treatment of cooling water circuit waters and cooling water. According to the applicant's experience, such an effect is obtained by the addition of polyglycolic ether of fatty alcohol. This nonionic surfactant can be added in solid form (powder) or in liquid form during the preparation of the additive and this in a volume of 1 to 5% of the volume of bleach thus conditioned.
Suivant l'objet de l'invention, un effet détergent et moussant de l'eau de javel ainsi conditionnée peuvent être recherchés notamment lors de la désinfection de surfaces. Suivant l'expérience du demandeur, de tels effets sont obtenus par l'ajout conjoint d'éther polyglycolique gras (volume de 1 à 5% du volume d'eau de javel ainsi conditionnée) et d'un mélange (volume de 1 à 5% du volume d'eau de javel ainsi conditionnée) d'oléfmesulfonate de sodium et de sel de sodium d'un alcanesulfonate secondaire.According to the subject of the invention, a detergent and foaming effect of the bleach thus packaged can be sought especially during the disinfection of surfaces. According to the applicant's experience, such effects are obtained by the joint addition of polyglycolic fatty ether (volume of 1 to 5% of the volume of bleach thus conditioned) and of a mixture (volume of 1 to 5 % of the volume of bleach thus conditioned) of sodium olefinsulfonate and sodium salt of a secondary alkanesulfonate.
Suivant l'objet de l'invention, l'eau de javel et ou les eaux javellisées ainsi conditionnées trouvent leurs principales applications dans la potabilisation de l'eau, le traitement des eaux potables contaminées ou susceptibles de l'être (curatif, préventif), des eaux destinées à l'irrigation agricole, des eaux de circuits aéroréfrigérants, de circuits de refroidissement, de réseaux incendie, de process industriels et la protection des installations qui les contiennent. According to the subject of the invention, the bleach and or bleached waters thus conditioned find their main applications in the potabilisation of water, the treatment of drinking water contaminated or likely to be (curative, preventive) , water intended for agricultural irrigation, water circuits cooling circuits, cooling circuits, fire networks, industrial processes and the protection of facilities that contain them.

Claims

REVENDICATIONS
1. Utilisation de phosphate monosodique anhydre de formule Na H2 PO4 sous forme solide comme additif chimique à de l'eau de javel et / ou à des eaux javellisées.1. Use of anhydrous monosodium phosphate of formula NaH 2 PO 4 in solid form as a chemical additive to bleach and / or bleach.
2. Utilisation de phosphate monosodique anhydre de formule Na H2 PO4 comme additif chimique à de l'eau de javel et / ou à des eaux javellisées, le phosphate monosodique anhydre étant dissous en solution aqueuse préalablement à son addition.2. Use of anhydrous monosodium phosphate of formula NaH 2 PO 4 as a chemical additive to bleach and / or chlorinated water, the anhydrous monosodium phosphate being dissolved in aqueous solution prior to its addition.
3. Utilisation selon la revendication 1 ou 2 caractérisée en ce que l'ajout de phosphate monosodique anhydre est effectué en quantité telle que le rapport molaire ([Na H2PO4] ajouté) / ([NaOH] initialement contenu dans l'eau de javel ou les eaux javellisées) soit ≥ 2 et de préférence ≤ 3.3. Use according to claim 1 or 2 characterized in that the addition of anhydrous monosodium phosphate is carried out in an amount such that the molar ratio ([NaH 2 PO 4 ] added) / ([NaOH] initially contained in the water bleach or bleach) is ≥ 2 and preferably ≤ 3.
4. Utilisation selon l'une quelconque des revendications 1, 2 ou 3, caractérisée en ce que le mélange de l'eau de javel et de l'additif est réalisé lors de l'usage et avant son mélange dans l'eau à traiter. 4. Use according to any one of claims 1, 2 or 3, characterized in that the mixture of the bleach and the additive is made during use and before mixing in the water to be treated .
5. Utilisation selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le mélange de l'eau de javel et de l'additif est introduit tel quel dans l'eau à traiter.5. Use according to any one of claims 1 to 4, characterized in that the mixture of bleach and the additive is introduced as such into the water to be treated.
6. Utilisation selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'eau de javel et l'additif sont introduits séparément dans l'eau à traiter.6. Use according to any one of claims 1 to 3, characterized in that the bleach and the additive are introduced separately into the water to be treated.
7. Utilisation selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle est appliquée au traitement des eaux. 7. Use according to any one of claims 1 to 6, characterized in that it is applied to the treatment of water.
PCT/FR2005/002691 2005-10-27 2005-10-27 Additive for javelle water WO2007048885A1 (en)

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PCT/FR2006/002423 WO2007048941A2 (en) 2005-10-27 2006-10-27 Method of using an additive for water chlorinated with javelle water

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2007048941A2 (en) * 2005-10-27 2007-05-03 Dominique Mercier Method of using an additive for water chlorinated with javelle water

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CA2028930A1 (en) * 1990-10-30 1992-05-01 Norman A. Miner Stable hypochlorous acid sterilizing solution and kit
FR2835702A1 (en) * 2002-02-12 2003-08-15 Dominique Mercier Disinfectant composition useful in the disinfection of water comprises a mixture of sodium hypochlorite and sodium monophosphate

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FR2593704B1 (en) * 1986-02-04 1988-07-08 Francaise Coop Pharma STABILIZED AND DILUTED SODIUM HYPOCHLORITE SOLUTE
US4995987A (en) * 1989-09-21 1991-02-26 Betz Laboratories, Inc. Enhancement of the efficacy of antimicrobials by the addition of anions capable of interfering with microbial electrochemical reactions
GB9420201D0 (en) * 1994-10-06 1994-11-23 Green Bruce P Cold sterilant solution
FR2830169A1 (en) * 2001-09-28 2003-04-04 Dominique Mercier Bactericidal composition useful for treating drinking water and disinfecting water mains comprises sodium or calcium hypochlorite and a phosphate
FR2869308A1 (en) * 2004-04-27 2005-10-28 Dominique Mercier Chlorinated water for cleaning/disinfecting pipes has added monosodium phosphate anhydride for extra anti-scale and anti-corrosion properties
WO2007048885A1 (en) * 2005-10-27 2007-05-03 Dominique Mercier Additive for javelle water

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Publication number Priority date Publication date Assignee Title
CA2028930A1 (en) * 1990-10-30 1992-05-01 Norman A. Miner Stable hypochlorous acid sterilizing solution and kit
FR2835702A1 (en) * 2002-02-12 2003-08-15 Dominique Mercier Disinfectant composition useful in the disinfection of water comprises a mixture of sodium hypochlorite and sodium monophosphate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007048941A2 (en) * 2005-10-27 2007-05-03 Dominique Mercier Method of using an additive for water chlorinated with javelle water
WO2007048941A3 (en) * 2005-10-27 2007-11-01 Dominique Mercier Method of using an additive for water chlorinated with javelle water

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