Method for preparing concentrated hydrogen peroxide solution

Abstract

A process for preparing a concentrated hydrogen peroxide solution. The present invention relates to an optimized preparation method to provide a concentrated hydrogen peroxide solution, which is capable of significantly concentrating in proportion and effectively providing hydrogen peroxide for in-situ industrial applications. The effort required to manage and transport such a hydrogen peroxide solution to a desired location where such a material is required is significantly reduced. In addition, the invention relates to a hydrogen peroxide solution preparation device suitable for implementing the method according to the invention. In addition, the invention relates to a fiber-based material processing facility using the device according to the invention.

Description

Technical Field

[0001] The present invention relates to a method for providing an optimized preparation of a concentrated hydrogen peroxide solution. Furthermore, the present invention relates to a hydrogen peroxide solution preparation device suitable for implementing the method of the present invention. Furthermore, the present invention relates to a fiber-based material processing facility using the device of the present invention. Furthermore, the present invention relates to a computer program product suitable for implementing the method of the present invention. Background Art

[0002] Hydrogen peroxide solution is a common chemical that is widely used in our daily lives. Moreover, it is one of the core chemicals required in many treatment processes used in industries. For example, industries related to fiber-based materials strongly rely on hydrogen peroxide solution for treating fiber-based materials. For example, disinfecting such fiber-based materials or bleaching the material. Avoiding other chemicals like chlorine poses serious threats and challenges to health and completely eliminating these threats and challenges to health without releasing this chlorine into the environment.

[0003] Although hydrogen peroxide is a very versatile chemical that can be used in many different ways, especially transport, it poses some challenges. Hydrogen peroxide solutions above a certain percentage become unstable and pose a significant threat due to the possible decomposition of hydrogen peroxide. However, transporting large amounts of hydrogen peroxide solutions, especially in the case of low-concentration solutions, also poses great challenges. In addition, storing the required amount of hydrogen peroxide solution requires storage facilities, which are often not available, especially after relying on years of demand delivery. At the same time, the past few years have shown the fragility of such systems. Although there are methods that can use electrochemical cells to produce hydrogen peroxide solutions on a small scale, the resulting concentrations are too low to be used in many applications. However, concentrating such solutions requires considerable effort and space and is therefore generally unavailable. In addition, controlling such devices to concentrate the solution usually requires expertise that existing operators do not have. There is not enough work provided to fill the operator's schedule specifically for this purpose. Therefore, it is necessary to provide an improved method to produce enough hydrogen peroxide solution for the corresponding application, such as ensuring a reliable supply of hydrogen peroxide, in particular to overcome new challenges, and improve the overall process and safety. Summary of the invention

[0004] This and other problems are solved by the products and methods disclosed below and in the claims. Further advantageous embodiments are disclosed in the dependent claims and in the further description and drawings. These advantages can be used to adapt the corresponding solution to specific needs or to solve additional problems.

[0005] According to one aspect, the present invention relates to a method for producing a hydrogen peroxide solution, comprising the following steps:

[0006] - Producing a hydrogen peroxide solution in an electrochemical cell,

[0007] - concentrated hydrogen peroxide solution in electrical cells,

[0008] wherein the fluid flow of the hydrogen peroxide solution is directed through an electric or magnetic field in the electrical cell,

[0009] wherein the fluid stream is divided into a hydrogen peroxide-rich portion of the fluid stream and a hydrogen peroxide-depleted portion of the fluid stream.

[0010] Note that this method allows the flexible and reliable provision of hydrogen peroxide solutions of the desired concentration on site as required. At the same time, the method requires little or no expertise to monitor. Prevents the necessity of increasing staff only for this purpose and prevents insufficient staff work. Even the limitations of the method of reaching high concentrations of hydrogen peroxide solutions such as 30% by weight and higher also bring benefits to this purpose, because even some failures or incorrect operation of the equipment implementing the method of the present invention will not lead to possible decomposition of the solution, thereby posing a threat to the facility or especially the individuals of the facility. Most of the corresponding equipment can be packaged and provided as an independent system, requiring little or even no maintenance, which further reduces the risks associated with it. All the benefits determined for the method of the present invention make it very suitable for providing a distributed hydrogen peroxide solution network, ensuring continuous industrial work independent of supply problems, and at the same time providing many benefits to make the application of hydrogen peroxide even more beneficial than before. Now even new applications are possible and beneficial.

[0011] According to another aspect, the present invention relates to a hydrogen peroxide solution preparation device, wherein the hydrogen peroxide solution preparation device is adapted to perform the steps of the method of the present invention. Surprisingly, such a complete hydrogen peroxide preparation device can be realized on a very small scale to provide hydrogen peroxide reliably and flexibly.

[0012] According to another aspect, the present invention relates to a fiber-based material processing facility, which comprises at least one hydrogen peroxide solution preparation device of the present invention. Fiber-based materials represent common materials used for centuries. Here, corresponding materials such as paper have changed from high-value items to commodity products as basic elements of modern life. However, the need for bleaching corresponding fiber-based materials (such as in the pulp and paper industry) or disinfecting such fiber-based materials (such as for the production of masks and similar appliances) requires a reliable source of chemicals (such as hydrogen peroxide solution). Although in the past, on-demand delivery ensured these processes, the method of the present invention allows, for example, to further improve the reliability of supporting the industry with the required chemicals, as well as significantly improve the overall efficiency and even improve the safety of individuals using the equipment of the present invention. It allows to easily adapt even existing facilities with very limited effort to continuously avoid, for example, future safety risks. The term "fiber-based material" as used herein preferably refers to a material comprising a fiber material (such as cellulose fibers).

[0013] According to another aspect, the invention relates to a computer program product tangibly embodied in a machine-readable storage medium, comprising instructions operable to cause a computing entity to perform the method of the invention.

[0014] According to another aspect, the invention relates to a storage device for providing an inventive computer program product, wherein the device stores the computer program product and / or provides the computer program product for further use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to simplify the understanding of the present invention, reference is made to the following detailed description and the accompanying drawings and their description. Here, the accompanying drawings should be understood not to limit the scope of the present invention, but to disclose preferred embodiments to further explain the present invention.

[0016] Figure 1 A schematic diagram showing the hydrogen peroxide solution preparation apparatus of the present invention. DETAILED DESCRIPTION

[0017] Preferably, unless otherwise stated, the embodiments below include at least one processor and / or data storage unit to implement the method of the present invention.

[0018] The term "data storage" or similar terms as used herein refers, for example, to a temporary data storage like a RAM (Random Access Memory) or a long-term data storage like a hard drive or a data storage unit like a CD, DVD, USB stick, etc. Such a data storage may additionally comprise or be connected to a processing unit to allow processing of the data stored on the data storage.

[0019] In the following, the invention will be described exemplarily with respect to pulp production as an example of a fiber-based material manufacturing process. It is noted that the application of the invention is particularly beneficial in this field. The corresponding pulp treatment is, for example, usually used for the manufacture of paper or paperboard products. The method of the invention can be used very advantageously to provide a flexible, effective and safe source of hydrogen peroxide, allowing a significant increase in the efficiency and reliability of, for example, pulp and paper production. In addition to the overall increase in the supply of hydrogen peroxide and the efficient handling, for example, it offsets the increasing risks regarding delivery problems, etc., making the previous types of on-demand organization of continuous delivery less and less attractive.

[0020] According to one aspect, the invention relates to a method as described above.

[0021] As mentioned above, it is noted that the method of the present invention is very suitable for application in pulp related processes. According to a further embodiment, it is preferred that the fiber based material is fiber pulp or paper.

[0022] According to another embodiment, preferably, the fluid stream provides a flow velocity of at least 0.7m / s, more preferably a flow velocity of at least 0.8m / s, even more preferably a flow velocity of at least 0.95m / s. Here m / s means meter / second. Note that the corresponding flow velocity surprisingly provides an improved separation of the enriched portion and the depleted portion, which need not be fully understood. Those skilled in the art can use a commonly available device to measure the flow velocity. For example, a magnetic induction flowmeter can be used. Here, the fluid flows in a tube and an electrode voltage is induced between a pair of electrodes placed at right angles to the magnetic field direction. The electrode voltage obtained is proportional to the average fluid velocity. Allowing fluid velocity to be easily determined. Of course, the technician can also use different devices known to him to determine this value.

[0023] According to another embodiment, it is preferred that the hydrogen peroxide concentration of the hydrogen peroxide-enriched portion of the fluid stream is at least 7 weight percent of the total weight of the hydrogen peroxide solution, more preferably at least 8 weight percent, and even more preferably at least 10 weight percent. Although lower concentrations can also be easily produced, it should be noted that for many applications (such as fiber-based material applications), providing at least such a concentration is particularly beneficial for closed gaps. Here, the above concentrations do not represent the concentrations required for industrial applications. The method of the present invention allows these concentrations to be easily reached, such concentrations can be easily processed by the method of the present invention, and the transfer of the corresponding concentrated solution can be easily arranged by thin-walled pipes that are easily introduced into available industrial facilities to distribute hydrogen peroxide solution to the desired location. It is noted that based on the amount of fluid to be processed and the changes in the existing facilities to be introduced, solutions of lower concentrations are generally less advantageously included in existing industrial plants. Although such concentrations are easy to transport to the desired location, it is still very beneficial to use such concentrations compared to transporting high-concentration hydrogen peroxide solutions to the desired location. It is worth noting that this benefit is particularly helpful for applications such as pulp and paper industries, which are generally faced with a lack of space for introducing such solutions.

[0024] According to another embodiment, it is preferred that the hydrogen peroxide concentration of the hydrogen peroxide-enriched portion of the fluid stream is at most 25% by weight of the total weight of the hydrogen peroxide solution, more preferably at most 24% by weight, and even more preferably at most 21% by weight. Although higher concentrations can be provided, the benefits obtained in this case are generally less prominent. In addition, it is noted that these concentrations still allow the hydrogen peroxide solution to be used for the intended purpose while significantly reducing the requirements for safety, thereby increasing the overall benefits of implementing the method of the present invention. Since the concentration of hydrogen peroxide solution required for applications such as fiber-based industries (such as the pulp industry) is relatively low and the concentration of concentrated solutions needs to be reduced, the possibility of the present invention to easily directly provide a solution of lower concentration for this purpose is surprisingly beneficial. In particular, it is noted that many accidents are associated with diluting the corresponding solution, and therefore (if not completely prevented) can at least be reduced. It should be noted that it is necessary to be particularly careful to dilute the high concentration solution that significantly increases the concentration above a certain level. However, compared with the significantly increased problem of transporting and storing lower concentration solutions, the requirements for transporting and storing hydrogen peroxide solutions increase this risk at this point. The method of the present invention thus allows particularly efficient provision of such lower concentration solutions, being very effective for improving workflow and safety in such industrial facilities.

[0025] In particular, it is noted that the combination of the above lower and upper limits is very advantageous. Note that utilizing this method allows the realization of a hydrogen peroxide network within existing industrial facilities. The small space required for the distribution network based on the lower limit allows such a network to be easily introduced. The upper limit of the hydrogen peroxide solution simplifies the dilution of the solution according to specific needs by requiring a lower amount of diluent at the corresponding location. The utilization in real life presents a surprising challenge and significantly reduces the risk compared to diluting a highly concentrated solution, especially in the case where this step is implemented by multiple people with limited expert knowledge. This actually poses a significant threat to the health of the corresponding workers. Combining this possibility with the method of the present invention, which is excellent in preparing such a solution, allows to provide a surprising improvement in many aspects of the workflow of the corresponding industrial facility.

[0026] According to a further embodiment, it is preferred that the hydrogen peroxide-enriched portion of the fluid stream and / or the hydrogen peroxide-depleted portion of the fluid stream is directed through the same or another electrotechnical cell. The enrichment of the respective hydrogen peroxide solution obtained by a first run through such an electrotechnical cell is usually already sufficient for applications such as fiber processing. However, in the case of low-power electrotechnical cells, for example, different applications or expected higher concentrations provide some more highly enriched hydrogen peroxide solution for storage reserves, preferably passing the solution through such an electrotechnical cell a number of times.

[0027] According to a further embodiment, preferably, the method comprises utilizing a first electrical cell and a second electrical cell, wherein the method comprises the step of directing a fluid flow through the first electrical cell and the second electrical cell, wherein the fluid flow is directed through the first electrical cell and the second electrical cell as a loop, wherein a hydrogen peroxide-enriched portion of the fluid flow is directed through the first electrical cell, and a hydrogen peroxide-depleted portion of the fluid flow is directed through the second electrical cell, wherein the first electrical cell provides a first hydrogen peroxide-enriched portion and a first hydrogen peroxide-depleted portion, and wherein the second electrical cell provides a second hydrogen peroxide-enriched portion and a second hydrogen peroxide-depleted portion, wherein the method comprises the step of forming a loop for enriching the hydrogen peroxide concentration using the first electrical cell and the second electrical cell until a predetermined hydrogen peroxide concentration is reached. Here, the first electrical cell and the second electrical cell may naturally be electrical cells that provide a first separation of the fluid flow into a hydrogen peroxide-enriched portion of the fluid flow and a hydrogen peroxide-depleted portion of the fluid flow. Furthermore, it is possible to initially direct the fluid stream into two electrical cells (the first electrical cell or the second electrical cell) and direct the hydrogen peroxide-rich portion of the fluid stream of both electrical cells into the first electrical cell. Simultaneously, the hydrogen peroxide-depleted portion of the fluid stream of both electrical cells is directed to the second electrical cell. Typically, it is preferred to utilize the portion of the fluid stream depleted in hydrogen peroxide again at the end in the hydrogen peroxide production in the initial step.

[0028] According to a further embodiment, the step of preparing hydrogen peroxide is preferably achieved by reacting hydrogen and oxygen in an electrochemical cell. Note that this method is very suitable for very small scale applications, for example, as required.

[0029] According to a further embodiment, the step of preparing hydrogen peroxide is preferably carried out by oxidizing water in an electrochemical cell. The corresponding method is very suitable for inclusion in, for example, a chemical-related facility. Note that, for example, the expertise of such a facility allows even most service tasks to be performed by existing personnel. The involvement of any third party is substantially avoided and an independent preparation is provided.

[0030] According to further embodiments, preferably, the step of preparing hydrogen peroxide is achieved by reacting hydrogen and oxygen in a first electrochemical cell, or wherein the step of preparing hydrogen peroxide is achieved by oxidizing water in a second electrochemical cell. Note that this flexible method allows providing a significant degree of flexibility, in particular by utilizing cheap electricity to fill gas containers with hydrogen and oxygen in order to flexibly convert these gases into hydrogen peroxide as needed.

[0031] According to a further embodiment, preferably, the method further comprises a step of producing hydrogen and oxygen in an electrolytic cell, wherein the hydrogen and oxygen are stored in a local gas container, wherein the hydrogen and oxygen are used in the electrochemical cell in the step of preparing hydrogen peroxide. It is noted that such a flexible solution may provide an important pillar in the future society by flexibly storing excess produced renewable energy and preparing valuable chemicals on site. At the same time, even the necessity to spend fossil fuels or electricity to drive vehicles that transport hydrogen peroxide solutions to such facilities is avoided.

[0032] According to a further embodiment, the method preferably comprises retrieving data on the availability of electricity in the power grid, wherein, depending on the availability of electricity, the electrolytic cell is used for the production of hydrogen and oxygen. Note that the use of the method of the invention allows to reduce the overproduction of electricity within the power grid, for example to compensate for the overproduction caused by renewable energy sources such as wind power and photovoltaics. Here, even the national power grid can benefit from this, since a plurality of corresponding devices distributed within the borders can flexibly store this electricity locally as hydrogen and oxygen in order to flexibly convert it into hydrogen peroxide for further use. Thus, it is not necessary to even shut down the corresponding renewable energy sources in the event of a large overproduction, and the generated electricity can be advantageously stored and utilized when the power grid is secure.

[0033] According to a further embodiment, preferably UV light is used to determine the hydrogen peroxide concentration of the enriched portion of the fluid flow and / or the hydrogen peroxide concentration of the depleted portion of the fluid flow. Note that the use of hydrogen peroxide fluorescence in response to UV light allows very efficient monitoring of the increase or decrease of the hydrogen peroxide content in the fluid flow. Allows very efficient control of this method and, for example, adapting the flow of the fluid flow in a cascade of repeated flows through an electrical cell or defining the end point of a cascade of repeated enrichment and depletion of the hydrogen peroxide content until a satisfactory hydrogen peroxide content is obtained.

[0034] According to a further embodiment, preferably, the fluid stream is repeatedly passed through at least three, more preferably at least five, even more preferably at least eight electrical cells simultaneously, wherein hydrogen peroxide solutions of different concentrations are fed into the electrical cells, and wherein hydrogen peroxide-enriched portions of the fluid stream and hydrogen peroxide-depleted portions of the fluid stream from the electrical cells are fed to each other to establish a cascade, thereby continuously increasing the hydrogen peroxide concentration of a portion of the fluid stream. It should be noted that establishing such a cascade of interconnected electrical cells allows continuously increasing the hydrogen peroxide concentration in a portion of the fluid stream that can be separated after having reached the desired and specified concentration. Although the corresponding depleted portion of the fluid stream can be disposed of or preferably reused to produce new hydrogen peroxide, this hydrogen peroxide will be fed again to the cascade of electrical cells.

[0035] According to another aspect, the present invention relates to a hydrogen peroxide solution preparation plant, wherein the hydrogen peroxide solution preparation plant is suitable for carrying out the steps of the method of the present invention. Surprisingly, such a complete hydrogen peroxide preparation plant can be realized on a very small scale to provide hydrogen peroxide reliably and flexibly.

[0036] According to a further embodiment, preferably, the hydrogen peroxide solution preparation apparatus comprises an electrolytic cell adapted to produce hydrogen and oxygen from water using electricity.

[0037] According to another aspect, the present invention relates to a fiber-based material processing facility comprising at least one inventive hydrogen peroxide production device. It is worth noting that the corresponding facility not only clearly benefits from the inventive hydrogen peroxide production device. The corresponding hydrogen peroxide production can be easily implemented in various existing fiber-based material processing facilities. In addition, this solution has a good acceptance and solves current needs through the device, so there is a huge demand.

[0038] According to another aspect, the invention relates to a computer program product tangibly embodied in a machine-readable storage medium, comprising instructions operable to cause a computing entity to perform the method of the invention.

[0039] According to another aspect, the invention relates to a storage device for providing an inventive computer program product, wherein the device stores the computer program product and / or provides the computer program product for further use.

[0040] The following detailed description of the drawings uses the drawings to discuss illustrative embodiments, which should not be construed as limiting, and their features and other advantages.

[0041] Figure 1 A scheme of a hydrogen peroxide solution preparation device of the present invention is shown. The hydrogen peroxide solution preparation device is advantageously used in the pulp industry as an example of a fiber-based material application (e.g., for bleaching fiber materials without the need for additional chemicals). Here, an electrochemical cell 1 produces a hydrogen peroxide solution to be treated according to the method of the present invention. The figure shows a specific example of a hydrogen peroxide solution preparation device of the present invention, which includes an integrated electrolyzer 12 that receives electricity from an external source (particularly a renewable energy source). Using electricity, the electrolyzer 12 produces an oxygen flow 15 and a hydrogen flow 16. These flows are temporarily stored in an oxygen container 13 and a hydrogen container 14 for further use. As needed, oxygen and hydrogen are recovered from the oxygen container 13 and the hydrogen container 14, and the electrochemical cell 1 uses oxygen and hydrogen to produce hydrogen peroxide dissolved in an aqueous low-concentration hydrogen peroxide solution.

[0042] The resulting hydrogen peroxide solution is transferred to the electrical cell 3 as a fluid stream 2. In the electrical cell 3, the fluid stream 2 is accelerated to a speed greater than 1 m / s and flows through an electric field, thereby causing inhomogeneity of hydrogen peroxide molecules in the fluid stream based on the dipole moment of the hydrogen peroxide molecules. Thereafter, the fluid stream 2 is separated into two parts by a blade-shaped member that physically separates the fluid stream 2 into a fluid stream 6 of a hydrogen peroxide-rich part and a fluid stream 7 of a hydrogen peroxide-depleted part.

[0043] The fluid stream 6 of the hydrogen peroxide-rich part is forwarded to the first electrotechnical cell 4, whose task is to finally provide the final concentrated hydrogen peroxide solution. The fluid stream 7 of the hydrogen peroxide-depleted part is forwarded to the second hydrogen peroxide-rich part 9 of the treatment solution-depleted part.

[0044] The first hydrogen peroxide-enriched portion 8 originating from the first electrochemical cell 4 is fed again to the first electrochemical cell 4 to be enriched again. At the same time, the second hydrogen peroxide-depleted portion 10 of the second electrochemical cell 5 is fed again to the second electrochemical cell 5 for further depletion. In order to compensate for the amount of fluid lost, the second hydrogen peroxide-enriched portion 9 is also fed to the first electrochemical cell 4 together with the first hydrogen peroxide-enriched portion 8 for repeated enrichment steps. The first hydrogen peroxide-depleted portion 11 is again fed to the second electrochemical cell 5 together with the second hydrogen peroxide-depleted portion 10 to repeat the depletion step. By repeating these steps, the hydrogen peroxide concentration can easily reach the concentration required for the subsequent industrial process, requiring very little energy and effort.

[0045] Although fairly high concentrations can be achieved by repeating the process, it is typically preferred to include additional electrical cells (e.g., a first electrical cell and a second electrical cell) in parallel with each other, allowing a cascade of connected fluid flows to be provided, thereby effectively increasing the hydrogen peroxide concentration with a low number of cycles through the electrical cells. The hydrogen peroxide concentration in the solution can be easily monitored by UV light, resulting in the fluorescence of the hydrogen peroxide being able to be quantified by a simple measurement to directly identify the amount of hydrogen peroxide available. Here, based on the interrelationship of such electrical cells, a single sensor can be used to monitor the entire system. However, the inclusion of multiple sensors and UV lamps allows for simplification of the system and prevents emergency actions in the event of a malfunction. Making service actions unnecessary is very valuable for, for example, encapsulated systems.

[0046] A corresponding arrangement can naturally also be used advantageously in other types of electrochemical cells, in particular electrochemical cells which utilize the oxidation of water instead of the direct reaction of hydrogen and oxygen.

[0047] The present invention is described in further detail only for the purpose of explanation. However, the present invention should not be understood to be limited to these embodiments, as they represent embodiments that provide benefits to solve specific problems or meet specific needs. The scope of protection should be understood to be limited only by the appended claims.

Claims

1. A method for preparing a hydrogen peroxide solution, comprising the following steps: - Preparation of hydrogen peroxide solution in an electrochemical cell, - concentrated hydrogen peroxide solution in electrical cells, wherein the fluid flow of the hydrogen peroxide solution is directed through an electric field or a magnetic field in the electrical cell, Therein, the fluid stream is divided into a hydrogen peroxide-enriched portion of the fluid stream and a hydrogen peroxide-depleted portion of the fluid stream.

2. A method according to any one of the preceding claims, wherein: The fluid flow provides a flow velocity of at least 0.7 m / s.

3. A method according to any one of the preceding claims, wherein: The hydrogen peroxide-rich portion of the fluid stream has a hydrogen peroxide concentration of at least 7 weight percent based on the total weight of the hydrogen peroxide solution.

4. A method according to any one of the preceding claims, wherein: The hydrogen peroxide-rich portion of the fluid stream has a hydrogen peroxide concentration of up to 25 weight percent based on the total weight of the hydrogen peroxide solution.

5. A method according to any one of the preceding claims, wherein: The hydrogen peroxide-rich portion of the fluid stream and / or the hydrogen peroxide-depleted portion of the fluid stream are directed through the same or a further electrical cell.

6. A method according to any one of the preceding claims, wherein: The method comprises utilizing a first electrical cell and a second electrical cell, wherein the method comprises the steps of directing the fluid flow through the first electrical cell and the second electrical cell, wherein the fluid flow is directed as a loop through the first electrical cell and the second electrical cell, wherein the hydrogen peroxide-enriched portion of the fluid flow is directed through the first electrical cell and the hydrogen peroxide-depleted portion of the fluid flow is directed through the second electrical cell, wherein the first electrical cell provides a first hydrogen peroxide-enriched portion and a first hydrogen peroxide-depleted portion, and wherein the second electrical cell provides a second hydrogen peroxide-enriched portion and a second hydrogen peroxide-depleted portion, The method comprises the following steps: using the first electrical cell and the second electrical cell to form a loop for enriching the concentration of hydrogen peroxide until a predetermined concentration of hydrogen peroxide is reached.

7. A method according to any one of the preceding claims, wherein: The step of producing the hydrogen peroxide is achieved by reacting hydrogen and oxygen in the electrochemical cell.

8. A method according to any one of the preceding claims, wherein: The step of producing the hydrogen peroxide is achieved by oxidizing water in the electrochemical cell.

9. A method according to any one of the preceding claims, wherein: The step of producing hydrogen peroxide is achieved by reacting hydrogen and oxygen in a first electrochemical cell, or wherein the step of producing hydrogen peroxide is achieved by oxidizing water in a second electrochemical cell.

10. A method according to any one of the preceding claims, wherein: The method further comprises the step of producing hydrogen and oxygen in an electrolytic cell, wherein the hydrogen and the oxygen are stored in a local gas container, Wherein, the hydrogen and the oxygen are used in the electrochemical cell in the step of preparing hydrogen peroxide.

11. A method according to any one of the preceding claims, wherein: UV light is used to determine the concentration of hydrogen peroxide in the enriched portion of the fluid stream and / or the concentration of hydrogen peroxide in the depleted portion of the fluid stream.

12. A method according to any one of the preceding claims, wherein: The fluid stream flows through at least three electrical cells simultaneously and repeatedly, wherein hydrogen peroxide solutions of different concentrations are supplied to the electrical cells, and Therein, a hydrogen peroxide-enriched portion of the fluid flow and a hydrogen peroxide-depleted portion of the fluid flow from the electrical cell are fed to each other to establish a cascade, thereby continuously increasing the hydrogen peroxide concentration of a portion of the fluid flow.

13. A hydrogen peroxide solution preparation device, wherein: The hydrogen peroxide solution preparation apparatus is suitable for performing the steps of the method according to any one of claims 1 to 12.

14. A fiber-based material processing facility comprising at least one hydrogen peroxide production device according to claim 13.

15. A computer program product tangibly embodied in a machine-readable storage medium, comprising instructions operable to cause a computing entity to perform the method according to any one of claims 1 to 12.

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