EP4615807A1 - Système et procédé de production d'une solution désinfectante à base d'acide hypochloreux - Google Patents
Système et procédé de production d'une solution désinfectante à base d'acide hypochloreuxInfo
- Publication number
- EP4615807A1 EP4615807A1 EP23804956.3A EP23804956A EP4615807A1 EP 4615807 A1 EP4615807 A1 EP 4615807A1 EP 23804956 A EP23804956 A EP 23804956A EP 4615807 A1 EP4615807 A1 EP 4615807A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disinfectant solution
- dilution tank
- electrodes
- electrolysis
- enclosure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/036—Bipolar electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B15/083—Separating products
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
- A61L2/16—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using chemical substances
- A61L2/18—Liquid substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
- A61L2101/02—Inorganic materials
- A61L2101/06—Inorganic materials containing halogen
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46128—Bipolar electrodes
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46152—Electrodes characterised by the shape or form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4612—Controlling or monitoring
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4612—Controlling or monitoring
- C02F2201/46125—Electrical variables
- C02F2201/46135—Voltage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/05—Conductivity or salinity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/05—Conductivity or salinity
- C02F2209/055—Hardness
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/29—Chlorine compounds
-
- 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
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
- C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
- C25B15/029—Concentration
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
- C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
- C25B15/029—Concentration
- C25B15/031—Concentration pH
Definitions
- the invention relates to a system for producing a disinfectant solution containing hypochlorous acid.
- the invention also relates to a method using this system.
- the field of the invention is that of the manufacture and design of devices and systems for the electrochemical production of hypochlorous acid.
- the invention finds particular application in the field of disinfection of, for example, but not limited to, water, air, hard or soft surfaces, plant, animal or human surfaces, surfaces of medical devices.
- Hypochlorous acid (CAS No. 7790-92-3) is a weak inorganic acid with the formula HOCI. It partially dissociates in water to produce the hypochlorite ion (OCI) according to the reaction of equation 1:
- hypochlorous acid is the predominant species at pH ⁇ 7.6 and the hypochlorite form becomes predominant at pH > 7.6 (alkaline pH). At pH values below 3.5, chlorine gas begins to form.
- HOCI hypochlorous acid
- the pH should preferably be maintained between 3.5 and 7.5.
- hypochlorous acid is, moreover, a major bactericidal compound in innate immunity. It is produced naturally in mammals by white blood cells to fight infections. It has properties germicides against a wide range of microorganisms (bacteria, viruses, fungi, etc.). Compared to sodium hypochlorite (main constituent of bleach) which is often used as a sterilizing agent, hypochlorous acid is said to be 80 to 120 times more effective while being less irritating to the skin.
- hypochlorous acid has many uses such as in water treatment, in hygiene and food safety, in sanitation of all types of surfaces, objects or food, as well as in pharmacy and medicine, particularly for wound care and skin disinfection. It should be noted that hypochlorous acid is approved by the United States Food and Drug Administration (FDA) as a biocidal product. Furthermore, the European Commission approved, in July 2021, active chlorine released from hypochlorous acid (EC number: 232-232-5) as an active substance in biocidal products used for human hygiene.
- FDA United States Food and Drug Administration
- the process according to equation 3 consists of acidifying an aqueous solution of a hypochlorite salt such as calcium or sodium hypochlorite, with an aqueous solution of an acidifier such as hydrochloric acid to obtain a disinfectant solution containing hypochlorous acid.
- a hypochlorite salt such as calcium or sodium hypochlorite
- an acidifier such as hydrochloric acid
- this process requires very precise control of pH and temperature during the acidification process to prevent or reduce the generation of toxic chlorine gas.
- this process requires the manufacturing, transportation and storage of hypochlorite salts and acid products which are corrosive chemicals.
- the first category includes split cells which use membranes to maintain complete separation of anode and cathode products in the cells, thus, the chlorine gas produced at each anode according to the equation dissolves in water to form hypochlorous acid according to the reaction of equation 2 mentioned above.
- the second category includes undivided cells that do not use membranes.
- the chlorine gas generated at each anode can directly react with the hydroxide anion produced at each cathode to form hypochlorite ions according to the reaction of equation 6, which hypochlorite ions can be in equilibrium with the hypochlorous acid according to the reaction of equation 1 mentioned above.
- the disinfectant solutions produced are generally contaminated with significant quantities of chloride salt and/or are very diluted and/or have a low concentration of hypochlorous acid ( ⁇ 3 ppm).
- the invention aims to remedy all or part of the aforementioned drawbacks.
- Another objective of the invention is to propose a system or process for producing a disinfectant solution based on hypochlorous acid which leaves the possibility for a user to obtain said disinfectant solution with the concentration of hypochlorous acid which is most suitable. to the use it wishes to do so.
- Yet another objective of the invention is to propose such a system or method which is simple in its design, easily achievable and easy to implement, on a small or large scale and which is inexpensive.
- Another object of the invention aims to propose such a system or method which allows the user to monitor the production of said disinfectant solution in an efficient manner.
- the solution proposed by the invention is a system for producing a disinfectant solution containing hypochlorous acid. This system is remarkable in that it includes:
- dilution tank dedicated to the preparation of the disinfectant solution, which tank has a water inlet allowing said tank to be filled with water
- At least one set of electrodes comprising at least one anode and at least one cathode arranged in the electrolysis enclosure
- conduit is arranged so that filling the dilution tank with water causes the electrolysis chamber to be filled with water, to prepare an aqueous solution containing chloride ions by dissolving part of the alkaline chloride stored in said enclosure, and so that when said aqueous solution is electrolyzed in the electrolysis enclosure using the set of electrodes to produce hypochlorous acid, at least part of the hypochlorous acid can migrate from said enclosure to said tank, and can be diluted in the water present in said tank in order to form the disinfectant solution.
- the system for producing a disinfectant solution containing hypochlorous acid according to the present invention has numerous advantages, in particular that of being simple in its design, easily achievable, easy to implement. work, on a small or large scale and inexpensive.
- the system according to the present invention allows a user to obtain the disinfectant solution with the concentration of hypochlorous acid which is best suited to the use he wishes to make of it.
- the user can adjust this system so that the disinfectant solution is concentrated in hypochlorous acid with the desired free chlorine content (for example, 5 ppm, 100 ppm, 250 ppm, 1500 ppm, 3000 ppm, or more than 3000 ppm).
- the system according to the present invention does not include any transfer means, for example of the pump type, to transfer the hypochlorous acid (and/or the hypochlorite ions) generated in the electrolysis enclosure from the latter to the storage tank. dilution in which hypochlorous acid must be mixed with water to form the disinfectant solution. It should also be noted that before the electrolysis, the dilution tank placed above the electrolysis enclosure contained water, and that after the electrolysis this water was replaced by the disinfectant solution.
- the electrolysis of the aqueous solution in the electrolysis chamber is adjusted to generate the formation of gas bubbles, so that said bubbles create turbulence capable of forcing the migration of at least one part hypochlorous acid from the electrolysis chamber to the dilution tank via the conduit.
- the at least one electrolyzer may be one or two or three or more than three electrolyzers.
- the at least one set of electrodes may be one or two or more sets of electrodes.
- the at least one set of electrodes further comprises a plurality of bipolar electrodes interposed between an anode and a cathode of the at least one set of electrodes.
- the at least one anode, the at least one cathode and the plurality of bipolar electrodes of the at least one set of electrodes are all in the form of flat plates, parallel and regularly spaced from each other. others.
- the at least one set of electrodes comprises a plurality of anodes and a plurality of cathodes, which pluralities of anodes and cathodes are in the form of flat plates arranged in parallel rows of alternating polarity.
- the electrolysis enclosure of the at least one electrolyzer may have a capacity of at least 10 liters.
- the dilution tank may further comprise means for breaking (or reducing the size) the bubbles of chlorine gas which may come from in the electrolysis enclosure of the at least one electrolyser in order to promote the dissolution of the chlorine gas in water, said means for breaking said gaseous chlorine bubbles being arranged at the bottom of the dilution tank at least opposite the conduit putting the electrolysis enclosure and the dilution tank into fluid communication.
- the means for breaking the gas bubbles can consist of at least one flat plate having perforations whose diameter is sufficient to reduce the size of the gas bubbles to dimensions favoring the dissolution of chlorine in the water.
- the perforations of the at least one plate have a diameter of less than 5 mm, preferably less than 1 mm.
- the means for breaking the gas bubbles are constituted by several flat and perforated plates, these plates are superimposed in such a way that the perforations of one plate are offset relative to the perforations of another plate which it is adjacent
- the system according to the present invention further comprises a measuring device comprising:
- - a display adapted to display the free chlorine content measured by the free chlorine sensor.
- the system according to the present invention further comprises regulation means for regulating the pH of the disinfectant solution forming in the dilution tank.
- the system according to the present invention further comprises a control unit functionally connected to the device for measuring the free chlorine content, which control unit is adapted to compare the free chlorine content measured by the sensor and a threshold value of the free chlorine content, and interrupt the electrolysis when the free chlorine content measured by the sensor is equal to or greater than the threshold value of the free chlorine content.
- the threshold value of the free chlorine content is set at a maximum value selected in a range from 5 ppm to 3000 ppm, in particular in a range from 10 ppm to 1500 ppm.
- the dilution tank has a water inlet which is connected to a water source by a water supply circuit comprising, in the direction of the dilution tank, a solenoid valve and a pump. traffic.
- the dilution tank has a sampling outlet for the disinfectant solution, which sampling outlet is connected to a tap provided on the water supply circuit between the solenoid valve and the circulation pump. so that the sampling line forms with the pump and the part of the water supply circuit located after this pump a recirculation loop which is configured to circulate the disinfectant solution from the sampling outlet to the water inlet .
- the free chlorine measuring device is placed on the recirculation loop, in particular on the sampling line, so as to allow continuous measurements to be carried out on the disinfectant solution.
- the aqueous solution to be electrolyzed may have a pH of 3 to 8, preferably a pH of 6 to 8.
- the present invention relates to a process for producing a disinfectant solution containing hypochlorous acid.
- This method is remarkable in that it comprises: a) a step of providing a system according to the present invention; b) a step of filling the dilution tank of said system with water, and in which filling the dilution tank with water causes the filling of the electrolysis enclosure of the at least one electrolyzer of said system by the conduit putting said electrolysis enclosure and said dilution tank into fluid communication, in order to prepare an aqueous solution containing chloride ions by dissolving part of the alkaline chloride stored in said electrolysis enclosure; c) a step of applying an electric current to the electrodes of the at least one set of electrodes of said at least one electrolyzer to electrolyze the aqueous solution containing chloride ions in said enclosure in order to produce hypochlorous acid, and in which at least part of the hypochlorous acid migrates from said enclosure towards said dilution tank via said
- dilution to form the disinfectant solution d) a step of measuring the free chlorine content of the disinfectant solution forming in said dilution tank; e) a step of interrupting the electrolysis when the free chlorine content measured in step d) reaches a desired free chlorine content value for the disinfectant solution; f) optionally, a step of measuring the free chlorine content by a sensor capable of measuring the free chlorine content of the disinfectant solution forming in said dilution tank; g) optionally, the interruption of the electrolysis provided for in step e) is taken care of by a control unit adapted to compare the free chlorine content measured by the sensor in step f) and a threshold value of the free chlorine content and to interrupt electrolysis when the free chlorine content measured by the sensor is equal to or greater than the threshold value of the free chlorine content; h) optionally, a step of measuring at least one intrinsic parameter of the disinfectant solution forming in the dilution tank, which intrinsic parameter is chosen from the list of parameters including pH, temperature, conductivity, and hardness ;
- the current voltage applied to the electrodes, in step c) of the process is between 1 and 15 volts, preferably between 2 and 10 volts.
- the disinfectant solution containing hypochlorous acid has a pH of approximately 5.1 to approximately 6.9, preferably a pH of approximately 6.5.
- the threshold value of the free chlorine content is set at a maximum value selected in a range from 5 ppm to 3000 ppm, in particular in a range from 10 ppm to 1500 ppm .
- FIG. 1 is an illustration of dissociation curves of hypochlorous acid in water as a function of pH
- FIG. 2 is a schematic representation of a system for producing a disinfectant solution according to the invention equipped with a dilution tank and an electrolyzer;
- FIG. 3 is a schematic representation of another production system a disinfectant solution according to the invention equipped with a dilution tank and two electrolysers;
- FIG. 4 is a photographic representation of a system for producing a disinfectant solution according to the invention equipped with a dilution tank and three electrolyzers;
- FIG. 5 is a perspective view of an example of an electrolyzer suitable for the present invention.
- FIG. 6 is a perspective view of an example of a hollow tube which can serve as a support element for a set of electrodes of the system according to the invention
- FIG. 7 is a perspective view of an example of a set of electrodes suitable for the present invention.
- FIG. 8 is a schematic representation of the system of Figure 2 further equipped with a device for measuring the free chlorine content
- FIG. 9 is a schematic representation of the system of Figure 8 further equipped with a control unit
- FIG. 10 is a schematic representation of the system of Figure 9 according to a first variant, the system being further equipped with a recirculation loop and the dilution tank of which is equipped with level detectors;
- FIG. 11 is a schematic representation of the system of Figure 9 according to another alternative embodiment, the system also being equipped with another form of recirculation loop and the dilution tank of which is equipped with level detectors;
- FIG. 12 is a schematic representation of an example of a dilution tank of the system of the invention according to a variant embodiment, in which the dilution tank is provided with a tubular gauge.
- the present invention aims firstly at a system intended to produce a disinfectant solution based on hypochlorous acid, preferably a disinfectant solution containing hypochlorous acid with a free chlorine content greater than 5 ppm.
- This system can be used by users to produce the disinfectant solution on a small scale, on site or on demand or on an industrial scale.
- the system which is the subject of the invention comprises:
- At least one electrolyser we must understand one electrolyser (see figure 2), two electrolysers (see figure 3), three electrolysers (see figure 4) or more than three electrolysers. Also, for the sake of simplification, only the case of the system with a single electrolyzer, shown in Figure 2, will be addressed in the remainder of the description, but the system and the method according to the present invention operates in a similar manner with two, three or more than three electrolyzers, and, advantageously, with high performance in the production of hypochlorous acid and disinfectant solutions containing it.
- the electrolyzer 100 used comprises an electrolysis enclosure 110 equipped with at least one set of electrodes 120.
- at least one set of electrodes we must understand one set of electrodes (see for example Figure 2), two or more than two sets of electrodes (see Figure 5).
- the system and the method according to the present invention operate similarly with two or more sets of electrodes, and, advantageously, with high performance in the production of hypochlorous acid and disinfectant solutions containing it.
- the dilution tank 300 of the system is provided with at least one bottom outlet 303.
- each at least one bottom outlet 303 is intended to be used with an electrolyzer 100.
- the dilution tank 300 can be provided with two, three or more than three bottom outlets 303 but of which only one bottom outlet 303 is connected to an electrolyzer 100.
- a single electrolyzer 100 equips the system according to the invention, and the dilution tank 300 is shown with a single bottom outlet 303.
- the dilution tank 300 can be a tank with several bottom outlets in which the unused bottom outlets can be closed by a suitable closing means (e.g. plug, tap, shut-off valve, etc.).
- the set(s) of electrodes 120 of the at least one electrolyser 100 are each intended to be supplied with electricity by an energy source 101 producing an electric current. This can be direct and/or pulsed current.
- the electrolyzer 100 comprises an electrolysis enclosure 110 storing alkaline chloride in solid form, and generally having an upper opening 111, which can be closed in a sealed manner by a removable cover 130 .
- the alkaline chloride stored in solid form in the electrolysis enclosure 110 is intended to be mixed with water in this enclosure 110 in order to produce the aqueous solution containing chloride ions whose electrolysis makes it possible to obtain hypochlorous acid.
- alkaline chloride is meant according to the present invention sodium chloride, potassium chloride and their mixture.
- sodium chloride will be discussed in the remainder of the description, but the system and the process according to the present invention applies to all types of alkaline chloride.
- solid form is meant according to the present invention any solid form having a weight of approximately 5 g to 30 g.
- the solid form of alkaline chloride such as sodium chloride is chosen from lozenges, tablets, and lozenges. The advantages of using alkaline chloride in solid form will be discussed later.
- the enclosure 110 can be made of any suitable electrically insulating material and resistant to corrosion by the aqueous solution containing alkaline chloride such as sodium chloride as well as by the products generated during electrolysis.
- the enclosure 110 is made of glass or rigid plastic, preferably transparent, for example, polyvinyl chloride (PVC), polypropylene reinforced with glass fibers (PRV), or Acrylonitrile-Butadiene-Styrene. (ABS) or polycarbonate (PC). It is clear, however, that this list is not exhaustive.
- PVC polyvinyl chloride
- PRV polypropylene reinforced with glass fibers
- ABS Acrylonitrile-Butadiene-Styrene.
- PC polycarbonate
- the enclosure 110 has the shape of a cylinder with a circular section which extends in the vertical direction. Its height varies for example from 15 cm to 150 cm or more than 150 cm, and its diameter varies for example from 10 cm to 80 cm, or more than 80 cm.
- the shapes and dimensions described for the enclosure 110 are given only by way of example, because the latter can have any other shape (e.g. parallelepiped or cylinder of oval section, or other shape) and appropriate dimensions, most suitable for the use for which the enclosure 110 and the system according to the invention are intended.
- the enclosure 110 can have any shape generated by a straight line which moves parallel to an axis, relying on two fixed planes.
- the circular section of a cylindrical enclosure can be truncated to present a flat part 112 in almost its entire height as illustrated in Figure 5.
- the electrolysis enclosure 110 of the system according to the invention is provided with a set of electrodes 120, which is intended to be connected to the energy source 101 producing an electric current.
- the number of sets of electrodes 120 to be used can be chosen according to the desired overall performance (e.g. production time of the disinfectant solution containing hypochlorous acid). Indeed, the Applicant was able to observe that with a system according to the invention comprising a single electrolysis enclosure 110, the more the number of sets of electrodes increases, the greater the production time of the disinfectant solution having a free chlorine content. data is reduced. This is highlighted in [Table 1] of the examples and which shows the effect of the number of sets of electrodes 120 per electrolyzer 100 on the production time of the disinfectant solution according to the present invention.
- the set(s) of electrodes 120 each comprise at least one anode and a cathode (not shown).
- anode a positive electrode, which will be the seat of the oxidation reaction of equation no. 4 (2CI'( aq) Cl2(g) + 2e') mentioned above, and by “cathode” a negative electrode, which will be the seat of the reduction reaction mentioned above.
- the electrodes of (at least one) set of electrodes 120 can be made of titanium, of titanium covered with a catalytic coating containing metal oxides, such as titanium oxide, ruthenium oxide, iridium oxide and tin oxide; made of titanium alloy; made of hastelloy® alloy (nickel-chromium-molybdenum alloy) or any other corrosion-resistant metal or alloy.
- a catalytic coating may consist of 45 to 55% titanium oxides, 25 to 30% ruthenium oxide and 20 to 20% of iridium.
- the electrodes may have a shape such as flat plates or other suitable shapes best suited to the use for which the (at least) one set of electrodes 120 is intended in the context of the present invention.
- the electrodes of (at least) one set of electrodes 120 are in the form of flat plates made of sufficient thickness (e.g. 1 mm to 4 mm) to be rigid.
- These flat plates can have a width ranging for example from 25 mm to 100 mm and a length sufficient to be able to insert the (at least) one set of electrodes 120 in the diametrical direction in the enclosure 110 and so that the electrodes of the at least one set of electrodes 120 is at least partially arranged inside the enclosure 110.
- the flat plates can have a width of less than 25 cm, for example a length between 15 cm to 24 cm.
- the inter-electrode space is between 0.1 cm and 1.2 cm, preferably between 0.1 cm and 0.5 cm. It should be noted that the closer the electrodes are to each other, the greater the contact/exchange surface area per unit volume and therefore the less voltage required. Indeed, as the distance increases, the energy requirement to pass the electric current (carried by the ions) through the aqueous solution containing chloride ions increases. Increasing the distance increases the electrical resistance and therefore at the same current intensity, the voltage must be increased (Ohm's law).
- a set of electrodes 120 may comprise two or more anodes and two or more cathodes, which anodes and cathodes are in the form of flat plates parallel to each other. from others, and are alternated in the game of electrodes 120 and sufficiently spaced from each other, for example 0.1 cm and 1.2 cm, preferably between 0.1 cm and 0.5 cm.
- the (at least) one set of electrodes 120 further comprises one or more bipolar electrodes arranged between an anode and a cathode of the (at least) one set of electrodes 120.
- bipolar electrode an electrode located at an intermediate potential between an electrode at a higher potential and another electrode at a lower potential, so that said electrode acts simultaneously as an anode on the part opposite the lower potential electrode and as a cathode on the part opposite the other.
- anodic type reactions occur on one side and cathodic type reactions on the other side.
- the bipolar electrode(s) can be made of any corrosion-resistant metal or alloy as for the other electrodes of the at least one set of electrodes 120. Furthermore, the bipolar electrode(s) can also have a shape substantially similar or identical to that of the anode and the cathode of the (at least one) set of electrodes 120. Preferably, the anode, the cathode and the bipolar electrode(s) are all in the form of flat, parallel and regularly spaced from each other, for example from 0.1 cm to 1 cm.
- the number of bipolar electrodes per set of electrodes 120 can for example range from 1 to 20, in particular from 2 to 18, for example can be equal to 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17.
- the number of anode(s) may be equal to one or more and the number of cathode may be equal to one or more.
- Bipolar electrodes are well known in the art (JP2004237165A, EP0065889A1, WO2012172118A1).
- the at least one set of electrodes is of the non-divided type (not
- the electrolyser 100 or the system according to the invention can also comprise at least one switch or an electrical control circuit usable to reverse periodically, for example every 90 min with a pause time of 5 min, the polarities of the electrodes of the at least one set of electrodes, so that the electric current circulates, between the electrodes, in one direction, then in the opposite direction (bipolar operation).
- the purpose of reversing the polarity of the electrodes is to eliminate or prevent a build-up of deposits (e.g. calcium deposits) on the electrode surfaces during operation. It leads to improved operation of the electrodes and extends their lifespan.
- a pause time after depolarization and repolarization of the electrodes of 5 min is optimal, this makes it possible to avoid the formation of short circuits between the electrodes of at least one set of electrodes 120. These short circuits can gradually deteriorate these electrodes.
- the reversal of the electrode polarities and the pause time can be controlled for the control unit 600 which will be described in more detail later.
- the (at least one) set of electrodes 120 is configured or adapted to be inserted, in a removable and sealed manner, into the electrolysis enclosure 110 through a respective opening 114 provided for this purpose in a wall of the electrolysis enclosure 110, and so that, in use, the electrodes of said (at least one) set of electrodes 120 are at least partly immersed in the aqueous saline solution to be electrolyzed. Maintaining the position of the set(s) of electrodes 120 in the wall of the enclosure 110 can be achieved by any means suitable to those skilled in the art, in particular by insertion with bayonet fitting or by screwing onto the wall through which the (at least one) set of electrodes 120 is inserted.
- the opening 114 of the wall 112 has for example a diameter of approximately 90 mm.
- the (at least one) set of electrodes 120 is in the form of or is arranged in a cylindrical or parallelepiped housing, insertable in the electrolysis enclosure 110 and having suitable peripheral openings or drillings so that, in operation, the electrodes of the (at least one) set of electrodes are in contact with the aqueous solution to be electrolyzed, on the one hand, and the alkaline chloride such as chloride of sodium, in solid form, cannot become encrusted between the electrodes of the (at least one) set of electrodes (120) and cause short circuits in the electrolyser 100, on the other hand.
- the alkaline chloride such as chloride of sodium
- the electrolysis enclosure 110 is provided with elongated hollow tubes 121, of horizontal axis, each arranged in the enclosure 110.
- Each of these hollow tubes 121 serves as a support element for a set of electrodes 120 and is designed to facilitate the insertion of the set of electrodes 120 into the enclosure 110, on the one hand, and the removal of the set of electrodes 120 from the enclosure 110, on the other hand, for example when it is desired to carry out control operations to be carried out on the electrodes and/or replacement of the latter.
- the elongated hollow tubes 121 each have peripheral holes provided so that, in use, the electrodes of (at least) one set of electrodes 120 inserted in the respective hollow tube 121 are in contact with the aqueous solution. saline electrolysis. Such peripheral drillings also aim to prevent alkaline chloride such as sodium chloride, in solid form, from becoming embedded between the electrodes of the (at least one) set of electrodes (120) and causing short circuits in the electrolyzer.
- the elongated hollow tubes can be made of a material substantially identical or similar to that constituting the enclosure 110. Their peripheral holes can have a diameter of 10 mm or less.
- FIG. 6 there is shown an elongated hollow tube 121 whose end which is intended to be fixed in the wall 112 of the enclosure 100, has an external thread 119 intended to fix by screwing a set of electrodes 120 provided with a counter-thread (not shown).
- a set of electrodes 120 provided with a counter-thread (not shown).
- other means or fixing techniques than those described with reference to Figure 6 can be provided to ensure the reversible and waterproof fixing of a set of electrodes 120 in an elongated hollow tube 121.
- the enclosure 110 is surmounted by a cover 130.
- This is configured or adapted to close the upper opening 111 of said enclosure 110, in a sealed manner.
- This cover 130 is removable so as to allow the loading of the alkaline chloride in solid form into the enclosure 110, on the one hand, and to allow easy access to the interior of the enclosure 110, in particular with a view to being able to carry out emptying and/or cleaning operations of the enclosure 110, on the other hand.
- the cover 130 is made of a material substantially similar or identical to that of the enclosure 110, in particular PVC, ABS or PC.
- the cover 130 can be fixed to the enclosure by screwing.
- the upper part of the enclosure 110 has an external thread 113 intended to fix by screwing the cover 130 provided with a counter-thread (not shown).
- a counter-thread not shown.
- cover 130 can be equipped with a suitable seal (not shown), for example made of elastomer, making it possible to create or reinforce the seal between the enclosure 110 and the cover 130.
- the cover 130 is provided with a conduit 200 (called the communication conduit).
- the communication conduit 200 can be used to fill the electrolysis enclosure 110 with water for the dissolution of the alkaline chloride which is already loaded there in solid form (via the upper opening 111) in order to form the aqueous solution containing chloride ions to be electrolyzed.
- the communication conduit 200 also allows the movement of hydrogen gas, at least a portion of hypochlorous acid and, where appropriate, chlorine gas generated in the enclosure 110 during the electrolysis reaction from this enclosure 110 towards the dilution tank 300 dedicated to the preparation of the disinfectant solution as will be described in more detail later.
- This communication conduit 200 is made of a material substantially similar or identical to that of the enclosure 110 or the cover 130, in particular in PVC, ABS or PC. It preferably has the shape of a cylindrical tube with a circular base. In use, it opens through its lower end into the enclosure 110 through a cover orifice 131 arranged in the removable cover 130. The free upper end of this communication conduit 200 is intended to be connected to the dilution tank 300 as will be described below.
- Such a communication conduit 200 can be made in one piece with the cover 130 or be fixedly attached in a sealed manner, for example via a rubber sealing ring (not shown) in this cover 130.
- the electrolysis enclosure can also comprise in its lower part an outlet orifice allowing it to be emptied.
- This outlet orifice can for example be closed by any suitable closing means, for example by a plug, a tap or the like.
- the conduit 200 is a straight and vertical conduit or substantially straight and vertical, but it is possible to provide an inclined conduit, or a conduit of helical shape, vertical or inclined.
- the system according to the present invention further comprises a dilution tank 300 in which the disinfectant solution will be prepared by diluting the hypochlorous acid coming from the at least one electrolyzer in water supplied by the source of water S.
- the tank 300 is intended to be placed above the at least one electrolyser 100.
- the number of electrolysers can be 1, 2 or 3 or more as indicated above. As can be seen in Figures 2, 3 and 4, this tank 300 is placed above, respectively, 1, 2 and 3 electrolyzers 100.
- the number of electrolyzers 100 is chosen according to the desired overall performance (e.g. production time of the disinfectant solution containing hypochlorous acid, hypochlorous acid content desired for the disinfectant solution). Indeed, the Applicant was able to observe that for a dilution tank 300 of a given volume of water, the more electrolyzers there are, the more the disinfectant solution is obtained with a given concentration of hypochlorous acid in a shorter time. This is highlighted in [Table 1] of the examples presented further, and which shows the effect of the number of electrolyzers 120 on the production time of the disinfectant solution according to the present invention.
- the tank 300 has at its upper part a water inlet 302 and at its bottom 305 at least one bottom outlet (or orifice) 303 (one bottom outlet per electrolyzer).
- the water inlet 302 is dedicated to the introduction of water into the dilution tank 300. It is intended to be connected to a water supply source “S” such as for example a tap or a municipal water pipe, or other.
- a water supply source “S” such as for example a tap or a municipal water pipe, or other.
- the water to be brought into the dilution tank 300 is tap water, but it is obviously possible to use natural spring water, distilled water, or deionized or filtered water.
- the system according to the present invention may further comprise a water filter arranged between the water supply source S and the water inlet 302 of the dilution tank 300.
- This water filter aims to eliminate, or at least reduce, any organic compounds (or organic pollutants) which may be present and which could interact with chlorine, among other electrolysis products of water saturated with sodium chloride.
- the water filter can be of any type known to those skilled in the art such as for example a particulate filter (cartridge filter, microfiltration membrane, sand); an activated carbon filter; an ultrafiltration membrane; a membrane contactor or a gas filtration membrane.
- the bottom outlet 303 can be connected to the communication conduit 200 of the electrolyser 100, for example, by means of any type of suitable quick and tight coupling known to those skilled in the art (see for example US5580099A; US20190063652A1; EP0829671A2, US20180252347A1).
- the dilution tank 300 can have any shape (e.g. parallelepiped or cylindrical with an oval section, or other shape) and appropriate dimensions, best suited to the use for which the enclosure 110 and the system according to the invention are destined.
- the tank 300 has the shape of a parallelepiped with a square or rectangular section.
- the volume of the dilution tank 300 can range from 1 liter to 500 liters or more.
- the invention is not limited to these shapes or dimensions for the dilution tank 300.
- the dilution tank 300 is made of a material substantially similar or identical to that of the enclosure 110, in particular PVC, ABS or PC. It is preferably protected against ambient light, for example by an auxiliary device for protection against ambient light (not shown).
- This auxiliary device can take the form of a box or a cabinet whose walls are made of opaque material, for example, but not limited to, wood, opaque plastic (e.g. PVC, HDPE), opaque glass, metal (e.g. .
- the dilution tank 300 may also comprise at its lower part an outlet orifice allowing the distribution of the disinfectant solution or the emptying of the tank 300.
- This outlet orifice can be closed for example by means of a tap or be connected by connection means (e.g. pipe) to a storage tank capable of receiving the disinfectant solution or to a flexible pipe for distributing the latter.
- the dilution tank 300 may further comprise means for breaking the bubbles of chlorine gas which may come from the electrolysis enclosure 110 of the at least one electrolyser 100 in order to promote the dissolution of chlorine gas in water, said means for breaking said bubbles of chlorine gas being arranged at the bottom of the dilution tank 300 at least opposite the conduit 200 putting said enclosure in fluid communication electrolysis and the dilution tank 300.
- the means for breaking the gas bubbles can be constituted by at least one flat plate and having perforations whose diameter is sufficient to reduce the size of the gas bubbles to dimensions favoring the dissolution of the chlorine in the water.
- the perforations of the at least one plate have a diameter of less than 5 mm, preferably less than 1 mm.
- the means for breaking the gas bubbles consist of several flat and perforated plates. These plates are generally superimposed in such a way that the perforations of one plate are offset in relation to the perforations of another plate adjacent to it.
- the means for breaking the gas bubbles consist of a strainer made of stainless metal or plastic (e.g. PVC) and with mesh whose size is less than 5 mm, preferably less to 1 mm.
- a strainer made of stainless metal or plastic (e.g. PVC) and with mesh whose size is less than 5 mm, preferably less to 1 mm.
- Step 1 we start with the electrolysis enclosure 110, which is in practice already equipped with (at least) one set of electrodes 120.
- alkaline chloride such as sodium chloride in solid form. It can be indicated that the quantity of alkaline chloride such as sodium chloride to be loaded into the electrolysis chamber must be sufficient to prepare an aqueous solution in which part of the alkaline chloride such as sodium chloride is dissolved, for example a brine or an aqueous solution saturated with this alkaline chloride.
- this has a solubility of approximately 357 g per liter of water at CTC.
- approximately 25 kg of sodium chloride in the form of pellets of approximately 15 g are loaded into an electrolysis chamber with a capacity of approximately 40 liters.
- sodium chloride in the form of pellets of approximately 15 g is available under the brand name AXAL® PRO, from the company K+S Minerais and Agriculture GmbH, located in Germany.
- potassium chloride or a mixture of sodium chloride and potassium chloride can be used to prepare the aqueous solution to be electrolyzed.
- Step 2 we then close the electrolysis enclosure 110 with its removable cover 130.
- Step 3 the electrolysis enclosure 110 loaded with alkaline chloride such as sodium chloride is placed, and closed by its cover 130 under the dilution tank 300.
- alkaline chloride such as sodium chloride
- Step 4 the conduit 200 of the electrolyzer 100 is connected to the corresponding bottom outlet 303 of the dilution tank 300.
- the connection can be made by any suitable quick and tight coupling means known to man of the profession, as mentioned above.
- the dilution tank 300 and the electrolysis enclosure 110 of the electrolyser 100 are in fluid communication with one another.
- Step 5 the dilution tank 300 is connected to the water supply source S, if necessary, via an appropriate water filter as mentioned above.
- Step 6 the water is introduced into the dilution tank 300 until the latter and also the electrolysis enclosure 110 are filled, the latter filling with water via the bottom outlet 303 of the tank dilution 300 and the conduit 200 of the electrolysis enclosure 110 to which this bottom outlet 303 is connected.
- alkaline chloride such as sodium chloride
- Step 7 we wait for sufficient time to allow the formation of chloride ions in the water, by dissolving at least part of the alkaline chloride, such as sodium chloride. In practice, this waiting time is approximately 5 minutes to 1 hour.
- Step 8 Once the complete system is assembled, the at least one electrolyser is supplied with electricity via the energy source 101 in order to start the electrolysis itself.
- the electric current supplying the electrodes of the at least one set of electrodes 120 (or electrodes of the at least one electrolyser 100) is a direct current.
- the electrolysis according to the invention can be carried out with a pulsed current.
- the direct (and/or pulsed) current used can have a current density of between 0.1 A/dm 2 and 10 A/dm 2 , or even above 10 A/dm 2 .
- the electrolysis is carried out with a direct (and/or pulsed) current having a current density of between 0.1 A/dm 2 and 5 A/dm 2 .
- the water contained in the dilution tank 300 and the aqueous solution contained in the electrolysis enclosure 110 together form a system which has an automatic tendency to return the concentrations of the chemical species (In the species here: water, hypochlorous acid and/or hypochlorite ions and chloride ions) which compose it homogeneously.
- This phenomenon of “irreversible” movement of chemical species which tends to homogenize the composition of the system corresponds to what in chemistry-physics is called chemical “diffusion”.
- hypochlorous acid and/or the hypochlorite ions as well as the chloride ions therefore tend to move (or migrate) from the aqueous solution from the electrolysis enclosure 110 towards the tank dilution tank 300 and, conversely, water tends to move (or migrate) from the dilution tank 300 towards the electrolysis enclosure 110.
- this movement of gas bubbles generates tiny vortices which promote the movement or diffusion of at least part of the molecules of hypochlorous acid and/or hypochlorite ions (or chlorine product) of the concentrated medium which is represented in this case by the aqueous solution contained in the electrolysis enclosure 110 towards the least concentrated medium which is represented in this case by the water of the dilution tank 300.
- the author of the present invention has found, surprisingly and unexpectedly, that the disinfectant solutions obtained using the system according to the present invention can possibly contain alkaline chloride such as sodium chloride, but in very high levels. low, less than 1 ppm, which is very advantageous in a process or system for producing disinfectant solutions.
- alkaline chloride such as sodium chloride
- the present invention leaves the choice to the user of the system for producing the disinfectant solution comprising hypochlorous acid to determine for himself the free chlorine content which is best suited to the disinfection operation he plans to carry out.
- 'perform for example air disinfection, disinfection of hard or soft surfaces, disinfection of medical devices, disinfection of the skin, disinfection of cuts on the skin, disinfection of plants (e.g. salads, fruits, vegetables, vines, plants), disinfection of buildings animal breeding, etc.
- the user can monitor, during the production process, the free chlorine content of the water contained in the dilution tank 300. Furthermore, when the value of the free chlorine content corresponds to what he desires, the user can interrupt the electrolysis in the electrolyzer(s).
- hypochlorous acid HOCI
- hypochlorite ions OCI
- the user can take samples of the disinfectant solution forming in the dilution tank 300 and analyze these samples to determine their free chlorine content.
- Sample collection and analysis can be carried out on an ad hoc basis or online, preferably online.
- the specific determination of the free chlorine content of the disinfectant solution can be carried out according to conventional analysis methods known to those skilled in the art: dosage by colorimetry, acid-base titration, dosage by amperometry, analysis by spectrophotometry (see e.g. WO2013121294A1), Oxidation-Reduction Potential (ORP) assay.
- the system according to the present invention further comprises a measuring device 400 comprising:
- a sensor 411 adapted to measure the free chlorine content in the disinfectant solution forming in the dilution tank 300
- a display 412 adapted to display the free chlorine content measured by the sensor 411.
- the threshold value of the free chlorine content corresponds to a maximum value, chosen, that the free chlorine content of the disinfectant solution in formation in the dilution tank 300 must not exceed. It is set by the user for example at a value greater than or equal to 5 ppm. It is generally chosen in a range between 5 ppm and 3000 ppm, in particular between 10 ppm and 1500 ppm. It should be remembered that the system according to the present invention could be adjusted, if necessary, for example so as to obtain a concentrated disinfectant solution of hypochlorous acid with a free chlorine content equal to or greater than 3000 ppm, in particular, a content of free chlorine equal to or less than 10,000 ppm
- the measuring device 400 with its sensor 411 and its display 412 may be of a type known and commercially available. It can be connected to a measuring tap located below the level of the disinfectant solution present in the dilution tank as illustrated in Figure 8, or in practice, be placed on a recirculation loop 450, as shown in the figures 9 to 12.
- the measuring device 400 allows, thanks to its sensor 411, a continuous measurement of the free chlorine content of the disinfectant solution present in the dilution tank, thus allowing real-time monitoring of the production of this disinfectant solution .
- the continuous display of the free chlorine content measured by the sensor 411 allows the user to monitor, in real time, the production of the disinfectant solution containing hypochlorous acid and to decide to interrupt at any time electrolysis when he considers that the disinfectant solution has a sufficiently high free chlorine content for the use he plans to make of it.
- the system according to the present invention can further comprise a control unit, designated by the reference 600 in Figures 9 to 12.
- This control unit control 600 is functionally connected to the measuring device 400 and is adapted to compare the free chlorine content measured by the sensor 411 and a threshold value of the free chlorine content and to interrupt the electrolysis when the free chlorine content measured by the sensor 411 is equal to or greater than the threshold value of the free chlorine content.
- the threshold value of the free chlorine content corresponds to a maximum value, chosen, that the free chlorine content of the disinfectant solution forming in the dilution tank 300 must not exceed.
- This threshold (or maximum) value can be selected in a range of free chlorine content greater than or equal to 5 ppm, in particular, in a range from 5 ppm to 3000 ppm, for example, a range from 10 ppm to 1500 ppm .
- the disinfectant solution forming in the dilution tank 300 generally has a pH greater than 3 and less than 8, in particular from 4 to 7.5. It is preferably maintained or regulated in a pH range of 5 to 7, preferably at a pH of approximately 5.1 to approximately 6.9, in particular at a pH of approximately 6.5.
- the system according to the present invention further comprises a pH probe 413 for measuring or determining the pH of the disinfectant solution present in the dilution tank 300.
- This pH probe can be of a type known and commercially available. It can be connected to a measurement tap located below the level of the disinfectant solution present in the dilution tank 300 as illustrated in Figure 8, or in practice, be placed on a recirculation loop 450 (shown in the figures 9 to 12). Alternatively, not shown, the pH probe can be placed immersed in the dilution tank 300 (e.g. use of a digital pH meter with remote probe available under Ref 2201 LM from MOINEAU Instruments, France).
- the pH probe 413 is included in the measuring device 400 comprising sensor 411, which measuring device 400 can also be configured to display, thanks to the display 412, the pH value measured by the pH probe 413 in addition to the value of the free chlorine content measured by the sensor 411.
- the system according to the present invention may further comprise a pH regulating device (not shown) connected to receive a signal from the pH probe 413 and being adapted to inject a pH correcting agent into the pH tank. dilution in response to the signal from the pH probe 413.
- pH correction agent we mean any acidic aqueous solution or any basic aqueous solution that does not alter the physicochemical characteristics of hypochlorous acid.
- the pH correcting agent is in the form of an aqueous solution containing an acid, preferably chosen from inorganic acids such as boric acid, hydrochloric acid, phosphoric acid and sulfuric acid and /or organic acids such as acetic acid, citric acid, ascorbic acid and propionic acid.
- the pH regulation device also includes a dosing pump capable of injecting a dose of the pH correcting agent into the disinfectant solution.
- the pH regulation device (dosing pump connected to the pH correcting agent reservoir) may be of a type known and commercially available. Its dosing pump can be connected to the dilution tank 300 (embodiment not shown) or be arranged at any location in a recirculation loop, such as the loop 450 shown in Figures 9 to 12.
- the pH probe 413 measures the pH value of the disinfectant solution present in the dilution tank, continuously or periodically, every 10 minutes for example. If the pH value measured by the probe 413 is higher, respectively lower, than a set value, generally set in a pH range of 5 to 7, preferably, a pH range of approximately 5.1 to approximately 6, 9, in particular at a pH of approximately 6.5, the dosing pump of the pH regulating device injects a dose of pH correcting agent so as to decrease, respectively increase the pH of the disinfectant solution until obtaining a pH equal to the set value.
- the pH regulation device is generally placed near the pH probe 413 which can be included in the measuring device 400 as mentioned above.
- the water inlet 302 of the dilution tank 300 is connected to the water source S by a water supply circuit 420 comprising, towards the dilution tank 300, a valve, preferably a solenoid valve 440 or 441, and a pump 430.
- the system according to the present invention can also comprise a loop recirculation, external, designated by the reference 450 in Figure 10.
- This recirculation loop 450 can be formed by a sampling line of at least part of the disinfectant solution, designated by the reference 410 in Figures 10 to 11, and part of the water supply circuit 420, the sampling line 410 being connected, on one side, to a sampling outlet 307 provided on the dilution tank 300 and, on the other side, to a tap, designated by the reference 421, located on the circuit water supply 420 between the solenoid valve 440 and the pump 430. This is designed to pump and circulate at least part (or fraction) of the disinfectant solution in the circulation loop 450, from the outlet of sampling 307 towards the water inlet 302 of the dilution tank 300.
- the two-way solenoid valve 440 is replaced by a three-way solenoid valve 441, a first way 441a of which is connected to the water source S, a second way 441 b is connected to the inlet of the pump 430 and a third channel 441c is connected to the sampling line at 410, the third channel 441c replacing the tap 421 used in the previous embodiment.
- the closure of the first channel 441 a and the opening of the second and third channels 441 b and 441 c of the solenoid valve 441 makes it possible to form a recirculation loop 450' equivalent to the recirculation loop 450 presented previously.
- the sampling outlet 307 is provided in the lower part, on a wall or on the base, of the dilution tank 300 and the water inlet 302 is provided in the upper part of the dilution tank 300.
- the sampling outlet 307 is placed in the upper part of the dilution tank 300 and the water inlet 302 in the lower part of the dilution tank.
- the sensors or measuring probes pH and free chlorine level
- the means for regulating the pH of the disinfectant solution can be arranged at the level of such a recirculation loop 450 or 450' . This allows the user to have real-time information on the parameters of the disinfectant solution and therefore to optimally monitor the production of the latter at the concentration desired by the user.
- the solenoid valve 440 or 441 and the pump 430 are controlled by the control unit 600.
- the dilution tank 300 is equipped with disinfectant solution level detectors in order to optimize the operation of the recirculation loop 450 or 450' and of the system of the present invention.
- three level detectors are placed in the dilution tank 300, namely a low level detector Ni, a high level detector N2 and a level detector intermediate N3 located between the low level Ni and high level N2 detectors.
- the dilution tank 300 is equipped with a tubular gauge 310 which is placed on the exterior wall (or one of the walls) of the dilution tank 300 by being arranged vertically in parallel to the latter.
- the tube 310 has a lower end 311 fluidly connected to an opening 306 in the lower part of the dilution tank 300 and an end upper 312 fluidly connected to an opening 308 in the upper part of the dilution tank.
- a low level detector Ni' is placed at the opening 306 of the dilution tank 300 (or at the lower end 311)
- a high level detector N2' is placed at the level of the 'opening 308 of the dilution tank 300 (or at the upper end 312)
- an intermediate level detector N3' located between the low level Ni' and high level N2' detectors.
- control unit 600 which can be configured to control, for example,:
- the low level detector Ni detects that the level of water or disinfectant solution in the dilution tank 300 is equal to or lower at a predetermined minimum level, it produces a low level signal which the control unit 600 receives. This then commands the solenoid valve 440 (or 441) to open the water supply circuit 420 to allow the water supply to the dilution tank 300. In the particular case of the solenoid valve 441, the control unit 600 will command the latter to open channels 441a and 441 b and to close channel 441c.
- the system according to the present invention may include forced operation and automatic operation.
- control unit 600 may include a user interface 601, of the type comprising buttons, allowing for example to select forced operation or automatic operation, to adjust the threshold values in particular the pH and the free chlorine content, to manage the production of the disinfectant solution (use of one or more electrolysers and/or sets of electrodes).
- the user interface 601 can also make it possible to control, via the control unit 600, different elements of the system according to the present invention, for example,
- the user interface 601 can also allow the user to find out sequentially about the operating state of the system, about the production of the disinfectant solution containing the hypochlorous acid, and in particular, about the value of pH measured by the pH probe 413, on the value of free chlorine rate measured by the sensor 411, or on the operating times of the electrolyzer(s) 100 recorded by the control unit 600 over time.
- control unit 600 only orders the interruption of the electrical current supply to the electrolyzer(s) 100 when the desired free chlorine content for the disinfectant solution is reached or exceeded .
- control unit 600 manages the production of the disinfectant solution containing hypochlorous acid, for example, by authorizing or prohibiting the supply of electrical current to one or more electrolyzers 100 , when there are several, and/or the supply of electric current to one or more electrodes 120, when there are several by electrolyser 100.
- the control unit 600 can continuously monitor the production of the disinfectant solution in the dilution tank and order the shutdown of the electrolyzer(s) 100, when there are several by cutting off the electrical current supply to the (x) corresponding set(s) of electrodes, in the case where the free chlorine content measured by the sensor 411 exceeds the value of the pre-recorded threshold.
- the control unit 600 can continuously monitor the production of the disinfectant solution in the dilution tank and order the shutdown of the electrolyzer(s) 100, when there are several by cutting off the electrical current supply to the (x) corresponding set(s) of electrode(s), in the case where the pH probe has measured a pH outside the pH threshold range previously recorded and where the control unit 600 has detected an anomaly in the operation of the pH regulating device, for example it is no longer capable or available to inject the pH correction agent to bring the pH back into the desired pH range.
- system according to the present invention may further comprise a remote information transmission system 603 and/or a system for storing all the information in the system according to the invention: - the percentage of production,
- This information can be recorded at least three times a day over 30 days in a loop. However, it may be preferable to retain information on the diagnosis of the system according to the invention, the occurrence of power outages.
- the control unit 600 is preferably provided with a screen 602 of the liquid crystal screen 82 type, or Liquid Crystal Display in English or LCD, communicating information on the operation of the system according to the invention to the user.
- control unit 600 For further information on the control unit 600 (its characteristics and uses) one can usefully refer to patent application WO2012172118A1 in the name of the applicant.
- the system according to the present invention can operate in manual and/or semi-automatic and/or automatic mode, to monitor the production of disinfectant solutions containing hypochlorous acid at the free chlorine contents desired by the user.
- the present invention also relates to a process for producing the disinfectant solution.
- This process according to the invention comprises:
- step c) in which an electric current is applied to the electrodes of the at least one set of electrodes 120 of the at least one electrolyzer 100 for electrolyzing the aqueous solution containing chloride ions in the enclosure 110 in order to produce hypochlorous acid, and in which at least part of the hypochlorous acid migrates from said enclosure 110 towards said dilution tank 300 via conduit 200, the at least one portion of hypochlorous acid having migrated being diluted in the water present in said dilution tank 300 in order to form the disinfectant solution;
- step e) in which the electrolysis is interrupted when the free chlorine content measured in step d) reaches a desired free chlorine content value for the disinfectant solution.
- the method according to the present invention may further comprise a step f) in which the free chlorine content is measured by the sensor 411 capable of measuring the free chlorine content of the disinfectant solution forming in said dilution tank.
- the method according to the present invention may further comprise a step g) in which the interruption of the electrolysis provided for in step e) is taken care of by the control unit 600 adapted to compare the content of free chlorine measured by the sensor 411 in step f) and a threshold value of the free chlorine content and to interrupt the electrolysis when the free chlorine content measured by the sensor 411 is equal to or greater than the threshold value of the free chlorine content.
- this threshold value of the free chlorine content is set at a maximum value selected in a range of 5 ppm to 3000 ppm, in particular in a range of 10 ppm to 1500 ppm.
- the method according to the present invention may further comprise a step h) in which at least one intrinsic parameter of the disinfectant solution forming in the dilution tank 300 is measured, which parameter intrinsic can be chosen from the list of parameters including pH, temperature, conductivity, and hardness.
- the method according to the present invention may further comprise a step g) in which the pH of the disinfectant solution forming in the dilution tank 300 is regulated.
- the current voltage applied to the electrodes is between 1 and 15 volts, preferably between 2 and 10 volts.
- the disinfectant solution containing hypochlorous acid has a pH of approximately 5.1 to approximately 6.9, preferably a pH of approximately 6.5. These pH ranges are optimal for the applications for which the disinfectant solutions produced according to the present invention are intended.
- the different elements (dilution tank, electrolyser(s), communication conduit, pipes, wiring, means of measurement (pH, free chlorine content) and regulation, control unit, etc.) of the system according to the present invention can be arranged in a compact assembly, with a small footprint, which is transportable and ready to be installed and used for the production of disinfectant solution based on hypochlorous acid.
- the entire system according to the present invention is carried by a vertical support structure capable of supporting at least the dilution tank 300 and the at least one electrolyser 100 (and its electrolysis enclosure 110) and ensuring the rigidity of the whole.
- This vertical support structure can, for example, be of the type comprising a frame delimiting a space dedicated to the production of the disinfectant solution according to the invention and in which are arranged:
- a first compartment mounted on the chassis and in which the at least one electrolyser 100, and where appropriate the circulation pump 430, can be arranged;
- this second compartment having in its lower part, at least one lower opening, to be able to place, through this at least one lower opening , the conduit of respective communication 200 of the at least one electrolyser,
- the exterior walls of the first compartment PC1 and/or second compartment PC2 serving as support for the other elements of the system according to the present invention such as the electrical power source 101, the water supply pipe, the cable(s) electrical, and where appropriate, the control unit 600, the solenoid valve 440 (or 441), and other components/elements considered to fall within the scope of the present invention.
- the invention is not limited to this form of mounting of the system herein.
- a form of frame comprising two opposite parallel side walls (or two pairs of opposite side uprights), an upper horizontal plate provided to support the tank 300, and a lower horizontal plate (or base or base) provided to support the at least one electrolyser 100 and where appropriate the pump 430, the upper and lower plates being fixedly connected to the opposite side walls (or to the pairs of opposite side uprights) and the upper plate having at least one lower opening, for the placement of the respective communication conduit 200 of the at least one electrolyser.
- one or more features set forth only in one embodiment may be combined with one or more other features set forth only in another embodiment.
- one or more characteristics presented only in one embodiment can be generalized to other embodiments, even if this or these characteristics are described only in combination with other characteristics:
- the electrolysis enclosure 110 or its cover 130 may be provided with a pressure gauge to monitor the pressure in this electrolysis enclosure 110,
- the dilution tank 300 can be fitted with a cover or a ceiling with an orifice for the evacuation of gas (hydrogen and, where applicable, chlorine gas),
- the electrodes of the at least one set of electrodes 120 may be full or perforated
- the electrolysis enclosure(s) 100 can be mounted on a base or base,
- the support structure intended to support the system according to the present invention can be equipped with rolling means such as casters in order to facilitate the movement of the entire said system.
- Electrolysis chamber 40 liters
- Electrodes per set of electrodes, 7 flat plates arranged in parallel rows of alternating polarity.
- the plates have a dimension of 210 mm long by 55 mm wide, and are made of titanium coated with titanium oxide, ruthenium oxide and iridium oxide,
- any parenthetical reference sign shall not be construed as a limitation of the claim.
- the use of the verb “include”, “understand” or “include” and its conjugated forms does not exclude the presence of other elements or other steps than those set out in a claim.
- one or more features shown only in one embodiment can be combined with one or more other features shown only in another embodiment.
- one or more characteristics exposed only in one embodiment can be generalized to other embodiments.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2211577A FR3141703A1 (fr) | 2022-11-07 | 2022-11-07 | Système et procédé de production d'une solution désinfectante à base d’acide hypochloreux |
| PCT/EP2023/080868 WO2024099983A1 (fr) | 2022-11-07 | 2023-11-06 | Système et procédé de production d'une solution désinfectante à base d'acide hypochloreux |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4615807A1 true EP4615807A1 (fr) | 2025-09-17 |
Family
ID=84488245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23804956.3A Pending EP4615807A1 (fr) | 2022-11-07 | 2023-11-06 | Système et procédé de production d'une solution désinfectante à base d'acide hypochloreux |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260159968A1 (fr) |
| EP (1) | EP4615807A1 (fr) |
| CN (1) | CN120187672A (fr) |
| FR (1) | FR3141703A1 (fr) |
| WO (1) | WO2024099983A1 (fr) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669666U (fr) * | 1979-11-01 | 1981-06-09 | Carlit Co Ltd | |
| FR2504942B1 (fr) | 1981-05-04 | 1985-11-22 | Degremont | Appareil d'electrolyse a electrodes bipolaires notamment pour l'electrolyse de solutions salines |
| US4599159A (en) * | 1985-05-28 | 1986-07-08 | Hilbig Herbert H | Electrolytic pool chlorinator having distribution chamber for filling anode and cathode chambers |
| US5580099A (en) | 1995-04-03 | 1996-12-03 | Eaton; Edward M. | Quick connect/disconnect coupling |
| JP3553242B2 (ja) * | 1995-11-02 | 2004-08-11 | 日機装株式会社 | 血液透析装置殺菌消毒用弱酸性電解酸性水生成装置 |
| GB9618922D0 (en) | 1996-09-11 | 1996-10-23 | Guest John D | Improvements in or relating to collets for coupling devices |
| JP2004237165A (ja) | 2003-02-04 | 2004-08-26 | Kurita Water Ind Ltd | 有機化合物含有水の処理方法および処理装置 |
| KR100794106B1 (ko) * | 2007-02-01 | 2008-01-10 | 남궁정 | 차아염소산 전기분해조, 이를 이용한 차아염소산 제조장치및 제조방법 |
| US20100078331A1 (en) * | 2008-10-01 | 2010-04-01 | Scherson Daniel A | ELECTROLYTIC DEVICE FOR GENERATION OF pH-CONTROLLED HYPOHALOUS ACID AQUEOUS SOLUTIONS FOR DISINFECTANT APPLICATIONS |
| FR2976590B1 (fr) * | 2011-06-16 | 2014-06-13 | Mp Technic | Dispositif de fabrication ou de production d'hypochlorite de sodium ou d'acide hypochloreux et systeme de traiment des eaux en general |
| EP2814776B1 (fr) | 2012-02-17 | 2018-04-11 | Wiab Water Innovation AB | Compositions d'acide hypochloreux (hoci) et procédés de production de celles-ci |
| GB2528650A (en) * | 2014-07-16 | 2016-02-03 | Gaffey Technical Services Ltd | An electrochlorination apparatus |
| JP5932927B2 (ja) * | 2014-09-19 | 2016-06-08 | シャープ株式会社 | 電解水生成器、電解水生成用電解質及び除菌用電解水 |
| CA2960023C (fr) | 2017-03-06 | 2023-08-08 | Ipex Technologies Inc. | Connexion de raccord de connexion/deconnexion liberable |
| US10473246B2 (en) | 2017-08-31 | 2019-11-12 | Flow-Rite Controls, Ltd. | Connector for a fluid handling system |
-
2022
- 2022-11-07 FR FR2211577A patent/FR3141703A1/fr active Pending
-
2023
- 2023-11-06 WO PCT/EP2023/080868 patent/WO2024099983A1/fr not_active Ceased
- 2023-11-06 EP EP23804956.3A patent/EP4615807A1/fr active Pending
- 2023-11-06 CN CN202380077680.4A patent/CN120187672A/zh active Pending
- 2023-11-06 US US19/127,601 patent/US20260159968A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3141703A1 (fr) | 2024-05-10 |
| CN120187672A (zh) | 2025-06-20 |
| WO2024099983A1 (fr) | 2024-05-16 |
| US20260159968A1 (en) | 2026-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2721198B1 (fr) | Dispositif de fabrication d'hypochlorite de sodium ou d'acide hypochloreux et systeme de traitement des eaux en general | |
| EP2796866B1 (fr) | Dispositif capteur à usage unique comprenant des moyens embarques pour traiter localement des signaux de mesure | |
| EP0002423B1 (fr) | Procédé et machine pour le lavage et le blanchiment de matières textiles | |
| JP5022704B2 (ja) | 表面殺菌及び現場殺菌用の電解槽 | |
| JPS6320496A (ja) | 自動化塩素発生装置 | |
| JP6250492B2 (ja) | 圧入水生産システム | |
| CN106715338A (zh) | 电解水生成器、电解水生成用电解质和除菌用电解水 | |
| CN104250827B (zh) | 用于减少水系统中沉积物的方法和稳定组合物 | |
| WO2016162327A1 (fr) | Cellule electrolytique pour la production d'au moins une substance chimique et machine de lavage | |
| US20200140295A1 (en) | Electrochemical cell | |
| KR101271179B1 (ko) | 차아염소산수를 이용한 관로 소독 시스템 및 세척 방법 | |
| CN102066266A (zh) | 杀菌方法以及杀菌装置 | |
| KR100802361B1 (ko) | 전해살균 소독수 공급장치 | |
| CN111498956B (zh) | 一种牙科综合治疗台供水系统及供水方法 | |
| FR2957566A1 (fr) | Dispositif pour le stockage et le transport de produits aquacoles. | |
| CA2515240C (fr) | Procede et dispositif de desinfection electrochimique des eaux | |
| FR2994174A1 (fr) | Procede et installation de traitement d'eaux de ballast de navires | |
| WO2024099983A1 (fr) | Système et procédé de production d'une solution désinfectante à base d'acide hypochloreux | |
| FR3027612A1 (fr) | Dispositif de desinfection de l'eau a configurations multiples utilisant une cellule d'electrolyse | |
| EP3487445B1 (fr) | Administration de soins buccaux antimicrobiens | |
| US20250277315A1 (en) | Electrolytic cell for the production of hypochlorous acid | |
| FR3023915A1 (fr) | Dispositif de prelevement et d'analyse de polluants chlores | |
| EP0219440A1 (fr) | Procédé de décontamination d'une plage de sable ou de galets | |
| FR2803841A1 (fr) | Dispositif et procede de desinfection et de lutte contre la legionellose dans des equipements de distribution d'eau chaude sanitaire | |
| JP2007196216A (ja) | 電解水生成装置および電解水を用いて行う殺菌方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250604 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: C02F 1/467 20230101AFI20260608BHEP Ipc: C25B 1/26 20060101ALI20260608BHEP Ipc: C02F 1/461 20230101ALN20260608BHEP Ipc: C02F 1/66 20230101ALN20260608BHEP Ipc: C02F 1/44 20230101ALN20260608BHEP Ipc: C02F 1/28 20230101ALN20260608BHEP Ipc: A61L 2/18 20060101ALN20260608BHEP Ipc: C25B 15/029 20210101ALN20260608BHEP Ipc: C25B 15/031 20210101ALN20260608BHEP |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: C02F 1/467 20230101AFI20260622BHEP Ipc: C25B 1/26 20060101ALI20260622BHEP Ipc: C25B 15/08 20060101ALI20260622BHEP Ipc: C02F 1/461 20230101ALN20260622BHEP Ipc: C02F 1/66 20230101ALN20260622BHEP Ipc: C02F 1/44 20230101ALN20260622BHEP Ipc: C02F 1/28 20230101ALN20260622BHEP Ipc: A61L 2/18 20060101ALN20260622BHEP Ipc: C25B 15/029 20210101ALN20260622BHEP Ipc: C25B 15/031 20210101ALN20260622BHEP |
|
| INTG | Intention to grant announced |
Effective date: 20260701 |