TWI842746B - Chlorine dioxide generator - Google Patents

Abstract

A chlorine dioxide generating device (X) for generating chlorine dioxide gas by reacting chlorite as a first component with a second component (2) that can react with the chlorite to generate chlorine dioxide gas comprises: an outer container (10) that can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container (20) that is accommodated in the outer container (10) and is used to seal a chlorite aqueous solution (1); a solid composition (30) that contains the second component (2); and a bag-shaped body (40) that accommodates the outer container (10) and is provided with a breathable portion (41) having air permeability.

Description

Chlorine dioxide generator

The present invention relates to a chlorine dioxide generating device which generates chlorine dioxide gas by reacting a first component, chlorite, with a second component which can react with the chlorite to generate chlorine dioxide gas.

Conventionally, there are known apparatuses or devices for reacting a chlorite solution with an acidic substance to generate chlorine dioxide gas (e.g., Patent Document 1). [Prior Art Document] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2007-145654

[The problem that the invention wants to solve]

However, it is known that chlorine dioxide generators are not developed for transportation, and most are placed on desks or floors or are large in size. Moreover, even if they are simply miniaturized to make them portable (portable), there is still the problem of liquid dripping from the inside of the device. Although the phenomenon of liquid dripping can be solved by ensuring the airtightness of the container, if the airtightness of the container is ensured, new problems such as blocking the release of chlorine dioxide gas will occur.

In addition, when fumigating a room, indoors or other similar space with chlorine dioxide gas, it is necessary to generate a large amount of high-concentration chlorine dioxide gas quickly to a certain extent. To increase the concentration of the generated chlorine dioxide gas, it is necessary to increase the concentration of the acidic substance used. However, high-concentration acidic substances, such as high-concentration sulfuric acid, are toxic substances, and they need to be handled with caution and are dangerous. If the concentration of the acidic substance is reduced to avoid its danger, the efficiency of chlorine dioxide gas generation will be reduced, and sufficient fumigation treatment will not be possible.

The present invention was completed in view of the above-mentioned facts, and its purpose is to provide a chlorine dioxide generating device that can quickly generate a large amount of chlorine dioxide gas by miniaturizing the device so that the source of chlorine dioxide gas can be safely transported (carried). [Means for solving the problem]

The first characteristic structure of the chlorine dioxide generating device of the present invention for achieving the above-mentioned purpose is that it generates chlorine dioxide gas by reacting chlorite, which is a first component, with a second component that can react with the chlorite to generate chlorine dioxide gas. It comprises: an outer container that can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container that is accommodated in the inner part of the outer container and is used to seal the chlorite aqueous solution; a solid composition that contains the second component; and a bag-shaped body that accommodates the outer container and is provided with a breathable air-permeable portion.

According to this configuration, the chlorine dioxide generating device can be miniaturized by sealing the outer container that accommodates the inner container or the solid composition in a bag-shaped body.

Furthermore, according to this configuration, since the solid composition containing the second component and the outer container are contained in the bag-shaped body, the solid composition containing the second component and the chlorite aqueous solution can be contained in a non-contact state. In this state, by applying an external force to the outer container to deform it, the easily destructible inner container contained inside can be easily destroyed. At this time, the chlorite aqueous solution will flow out from the inner container to the inside of the outer container. Since the outer container is configured to discharge liquid, the chlorite aqueous solution is discharged from the outer container and contacts the solid composition containing the second component, thereby generating chlorine dioxide gas. The chlorine dioxide gas generated in the bag-shaped body is released from the air-permeable vent to the outside of the bag-shaped body.

As chlorine dioxide gas is released from the ventilation part, the concentration of chlorine dioxide gas in the fumigation chamber increases, and chlorine dioxide treatment of the treated object (bacterial and fungal sterilization, virus inactivation, pest control, etc.) can be carried out in the fumigation chamber for a predetermined time. At this time, chlorine dioxide gas can be generated in large quantities and quickly. That is, after a large amount of chlorine dioxide gas is generated in a short period of time, the amount of chlorine dioxide gas generated will temporarily decrease. Therefore, the fumigation treatment time of the space in the fumigation chamber (people's avoidance time) can be shortened, and people can enter the fumigation chamber immediately after ventilation.

The reason why a large amount of chlorine dioxide gas is temporarily generated in the chlorine dioxide generating device of this structure is that since the second component is contained in the solid composition, the free water in the reaction system can be reduced. That is, the second component can be reacted at a state higher than the apparent concentration of the second component in the solid composition. Therefore, the contact area (reaction probability) between chlorite and the second component increases and the reaction speed is increased, thereby making the reaction more intense, and it is judged that chlorine dioxide gas is temporarily (rapidly) generated.

Furthermore, according to this structure, the bag-shaped body can release the chlorine dioxide gas in the breathable ventilated portion.

The second characteristic structure of the chlorine dioxide generating device of the present invention is that it generates chlorine dioxide gas by reacting the first component chlorite with the second component that can react with the chlorite to generate chlorine dioxide gas, and it comprises: an outer container that can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container that is accommodated in the inner part of the outer container and is used to seal the aqueous solution of the second component; a solid composition that contains the chlorite; and a bag-shaped body that accommodates the outer container and is provided with a breathable air-permeable portion.

According to this configuration, the chlorine dioxide generating device can be miniaturized by sealing the outer container that accommodates the inner container or the solid composition in a bag-shaped body.

Furthermore, according to the present configuration, since the solid composition containing chlorite and the outer container are contained in the bag-shaped body, the solid composition containing chlorite and the aqueous solution of the second component can be contained in a non-contact state. In this state, by applying an external force to the outer container to deform it, the easily destructible inner container contained inside can be easily destroyed. At this time, the aqueous solution of the second component will flow out from the inner container to the inside of the outer container. Since the outer container is configured to discharge liquid, the aqueous solution of the second component is discharged from the outer container and contacts the solid composition containing chlorite, thereby generating chlorine dioxide gas. The chlorine dioxide gas generated in the bag-shaped body is released from the air-permeable vent to the outside of the bag-shaped body.

Furthermore, according to this structure, the bag-shaped body can release the chlorine dioxide gas in the breathable ventilated portion.

The third characteristic of the chlorine dioxide generating device of the present invention is that the bag-shaped body is configured to be rectangular in a plan view, and the air permeable portion is configured to be planar.

According to this configuration, the air permeable portion can be formed on at least one side of the front and back sides of the bag-shaped body. Thus, since the chlorine dioxide generated inside the bag-shaped body can be released from the entire surface of at least one side of the bag-shaped body, a large amount of chlorine dioxide gas generated can be quickly released to the outside of the bag-shaped body.

The fourth characteristic of the chlorine dioxide generating device of the present invention is that the aforementioned air permeable part is formed by processing the synthetic resin material into a non-woven fabric.

According to this structure, the breathable portion can be made breathable and liquid-impermeable.

The fifth characteristic of the chlorine dioxide generating device of the present invention is that the aforementioned solid composition contains a porous substance as a carrier.

According to this configuration, since the porous material serves as a carrier for supporting the first component or the second component, the first component or the second component can be stably retained inside the bag-shaped body.

The sixth characteristic of the chlorine dioxide generating device of the present invention is that the solid composition is made into granules.

According to this configuration, by making the solid composition into granules, the solid composition can easily move freely inside the bag. Therefore, for example, when the chlorite aqueous solution comes into contact with the solid composition containing the second component, the chlorite aqueous solution and the second component can react effectively by shaking the bag to the left and right to make the solid composition move freely, and chlorine dioxide gas that complies with the reaction theoretical value can be generated.

The seventh characteristic of the chlorine dioxide generating device of the present invention is that the outer container and the inner container are configured as a tube, and an outer container cover is provided at both ends of the outer container, and both ends of the inner container are supported by being respectively in contact with the inner surfaces of the outer container cover provided at both ends of the outer container.

According to this structure, since both ends of the inner container can be clamped and held by a pair of outer container covers, the inner container can be prevented from moving inside the outer container. This can prevent the inner container from being damaged by the impact of the inner container moving inside the outer container and contacting the inner surface of the outer container during transportation of the chlorine dioxide generator.

The eighth characteristic feature of the chlorine dioxide generating device of the present invention is that the second component is an acidic substance.

According to this configuration, by making the second component that can react with chlorite to generate chlorine dioxide gas an acidic substance, chlorite can react with the acidic substance to easily generate chlorine dioxide gas.

The ninth characteristic of the chlorine dioxide generating device of the present invention is that the aforementioned acidic substance is sulfuric acid, and the aforementioned chlorite is sodium chlorite or potassium chlorite.

According to this structure, sulfuric acid as an acidic substance has excellent storage stability, does not generate corrosive gas, and does not change in concentration after being supported by a porous substance, so it is easy to handle. In addition, sodium chlorite or potassium chlorite as chlorite is easy to obtain, so the present invention can be easily implemented.

The tenth characteristic feature of the chlorine dioxide generator of the present invention is that the concentration of the acidic substance is less than 30% by weight, and the concentration of the chlorite is 0.1 to 30% by weight.

According to this configuration, when the concentration of the acidic substance exceeds 30% by weight, the viscosity of the solution becomes high and it is difficult to disperse, and the unevenness of the prepared acidic substance becomes large and poor. In addition, when the concentration of chlorite is less than 0.1% by weight, there may be a problem of insufficient chlorite when generating chlorine dioxide gas; when it exceeds 30% by weight, there may be a problem of chlorite being easily saturated and precipitating crystals. Therefore, in view of safety or stability, the efficiency of generating chlorine dioxide gas, etc., it is preferably 0.1 to 30% by weight.

[Form of implementing the invention]

The following is an explanation of the implementation form of the present invention based on the drawings. The chlorine dioxide generating device of the present invention generates chlorine dioxide gas by reacting a first component, chlorite, with a second component that can react with the chlorite to generate chlorine dioxide gas.

As shown in FIG. 1 , the chlorine dioxide generating device X of the present invention comprises: an outer container 10 which can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container 20 which is accommodated in the inner part of the outer container 10 and is used to seal the chlorite aqueous solution 1; a solid composition 30 which contains a second component 2; and a bag-shaped body 40 which accommodates the outer container 10 and is provided with a breathable vent 41.

The second component can be any substance that can react with chlorite to generate chlorine dioxide gas, and can be, for example, an acidic substance, or a substance that does not contain an acidic substance but reacts with chlorite to generate chlorine dioxide as a single substance. In this embodiment, the second component 2 is described as an acidic substance. The acidic substance is preferably an acidic substance that exhibits acidity by dissolving in water.

(Outer container) The outer container 10 can be deformed by applying an external force and has a space inside that can accommodate the inner container 20. As a material that presents such a shape, for example, a flexible material can be exemplified. The flexibility referred to here means that it has the property of being easily bent into an arc shape and deformed by applying an external force, and easily returning to its original shape when the applied force is released. Specifically, the flexible resin material includes polyethylene, polypropylene or silicone.

The shape of the outer container 10 may be, for example, a tube (test tube), a rod, a bag, a box, etc., but is not limited thereto. For example, when the outer container 10 is formed in a bag shape, the inner container 20 is previously contained inside the bag-shaped outer container 10. When an external force is applied, the bag-shaped outer container 10 is preferably pressed to deform to the extent that the inner container 20 is destroyed. In this embodiment, the case where the outer container 10 is formed in a tube shape is described.

The outer container 10 is configured to discharge liquid. In this embodiment, the outer container cover 11 is provided at both ends of the outer container 10 with a plurality of small openings 11a (e.g., 5 openings with a diameter of 2 mm). That is, liquid can be discharged through the openings 11a formed in the outer container cover 11.

In order to hold the inner container 20 inside the outer container 10, it is preferable to support the inner container 20 by contacting the inner surfaces of the outer container cover 11 provided at the two ends of the outer container 10. With this configuration, the inner container 20 can be prevented from moving inside the outer container 10 because the two ends of the inner container 20 can be clamped and held by the pair of outer container covers 11. This can prevent the inner container 20 from being damaged due to the impact of the inner container 20 moving inside the outer container 10 and contacting the inner surface of the outer container 10 during transportation of the chlorine dioxide generator X.

(Inner container) The inner container 20 can seal the chlorite aqueous solution 1 and is a fragile container. The term "fragile" here means that it can be easily deformed by applying force from the outside, or bent (or bent at an attempt) to cause cracks or ruptures, and can be broken, but it cannot be broken by shaking or slight impact during transportation or storage. The fragile enclosure can be, for example, a glass ampoule or a thin plastic container. When a plastic container is used as the destructible inner container 20, a fragile portion may be artificially provided in the container in advance, and a force may be applied from the outside to bend the container (or attempt to bend the container), thereby causing cracks or ruptures (damage) to occur in the fragile portion.

The shape of the inner container 20 may be, for example, a tube (test tube), a rod, a bag, a box, etc., but is not limited thereto. In this embodiment, the inner container 20 is described as being in a tube shape.

(Bag-like body) The bag-like body 40 is provided with a breathable ventilated portion 41. In this embodiment, the bag-like body 40 is configured to be rectangular in plan view and the ventilated portion 41 is configured to be planar, but the invention is not limited thereto. In this configuration, the ventilated portion 41 can be formed on at least one side of the front and back surfaces of the bag-like body 40. Thus, since the chlorine dioxide generated inside the bag-like body 40 can be released from the entire surface of at least one side of the bag-like body 40, a large amount of chlorine dioxide gas generated can be quickly released to the outside of the bag-like body 40.

The bag-shaped body 40 is made to be breathable and liquid-impermeable on at least one of the front and back surfaces. That is, the bag-shaped body 40 can make the front surface breathable and liquid-impermeable, and make the back surface non-breathable and liquid-permeable, or make the front surface non-breathable and liquid-permeable and make the back surface breathable and liquid-impermeable, or make both the front and back surfaces breathable and liquid-impermeable. In this case, the bag-shaped body 40 can be made to be light-transmissive on at least one of the front and back surfaces. The peripheral portion 40a of the bag-shaped body 40 is preferably formed by heat sealing, ultrasonic sealing, adhesive, etc.

In order to make the surface or back of the bag-shaped body 40 breathable and liquid-impermeable, it is preferable that the breathable portion 41 provided on the surface or back is formed by processing a synthetic resin material into a non-woven fabric. The non-woven fabric may be, for example, a high-density polyethylene non-woven fabric sheet, but is not limited thereto. The non-woven fabric may be, for example, EXEPOL (registered trademark, manufactured by Mitsubishi Chemical Co., Ltd.), Tyvek (registered trademark, manufactured by Du Pont Co., Ltd.), GORE-TEX (registered trademark, manufactured by WL Gore & Associates Co., Ltd.), but is not limited thereto.

To make the surface or back of the bag-shaped body 40 non-air-permeable and liquid-permeable, a thin sheet made of a synthetic resin material such as acrylonitrile styrene (AS) resin, acrylonitrile butadiene styrene (ABS) resin, ethylene vinyl alcohol (EVOH) resin, vinyl chloride resin, polyethylene resin, polypropylene resin, polyolefin resin, etc. can be used, but it is not limited to this.

(Chlorite) The chlorite used in the present invention may be, for example, a chlorite metal salt or a chlorite earth metal salt. Examples of chlorite metal salts include sodium chlorite, potassium chlorite, and lithium chlorite; examples of chlorite earth metal salts include calcium chlorite, magnesium chlorite, and barium chlorite. Among them, sodium chlorite and potassium chlorite are preferred in terms of easy availability, and sodium chlorite is the best. These chlorites may be used alone or in combination of two or more.

The proportion of chlorite in the aqueous chlorite solution is preferably 0.1% to 30% by weight. If it is less than 0.1% by weight, there may be a problem of insufficient chlorite when generating chlorine dioxide gas; if it exceeds 30% by weight, there may be a problem of chlorite being easily saturated and precipitating crystals. In view of safety, stability, and the efficiency of generating chlorine dioxide gas, it is preferably 15% to 25% by weight, and more preferably 20% to 25% by weight.

(Acidic substances) The acidic substances that can be used in the present invention are inorganic acids or organic acids or salts thereof, such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, boric acid, metaphosphoric acid, pyrophosphoric acid, sulfanilic acid and other inorganic acids, formic acid, acetic acid, propionic acid, butyric acid, lactic acid, pyruvic acid, citric acid, apple acid, tartaric acid, gluconic acid, glycolic acid, fumaric acid, malonic acid, maleic acid, oxalic acid, succinic acid, acrylic acid, crotonic acid, oxalic acid, glutaric acid and other organic acids, or salts thereof. In addition, the salts of inorganic acids include dihydrogen phosphate (sodium salt or potassium salt, the same below), a mixture of dihydrogen phosphate and monohydrogen phosphate, etc. Among them, sulfuric acid is preferably used because of its excellent storage stability, no generation of corrosive gas, and no concentration change after being (impregnated) in a porous material. The final concentration of sulfuric acid in the state of being contained in the solid composition 30 is preferably set to 30 wt % or less, preferably 10 wt % or less, which is preferable from the perspective of safety. The acidic substance may be used alone or in combination of two or more.

(Solid composition) The solid composition 30 may be in any form as long as it contains the second component (acidic substance), and may be in the form of, for example, a crystal containing an acidic substance or a porous substance containing an acidic substance. In this embodiment, the solid composition 30 is described with reference to a case where the porous substance is used as a carrier. That is, the "solid composition 30 containing the second component 2" is a porous substance containing an acidic substance that exhibits acidity when dissolved in water.

The solid composition 30 is preferably made into granules. By making the solid composition 30 into granules, the solid composition 30 can easily move freely inside the bag 40. Therefore, when the chlorite aqueous solution comes into contact with the solid composition 30 containing the second component (acidic substance), the reaction between the chlorite aqueous solution and the acidic substance can be effectively carried out by shaking the bag 40 left and right to make the solid composition 30 move freely, and chlorine dioxide gas that complies with the reaction theoretical value can be generated.

The porous material may be, for example, a porous material or a calcined aggregate, but is not limited thereto. Examples of porous materials include porous silica, sepiolite, montmorillonite, diatomaceous earth, talc, zeolite, activated clay, molecular sieves, activated alumina, and the like. Among them, porous silica is preferably used because it is easy to obtain, has excellent porosity (large porous space), and is easy to contain acidic substances or chlorite. The specific surface area of such porous silica is not particularly limited. Calcined aggregates may be, for example, bones, shells, and corals of animals (including mammals, fish, and birds) that are calcined to form broken flakes, particles, or powder.

The particle size of such a porous material is preferably set to, for example, about 0.05 to 10 mm. In addition, the porous material is preferably selected to have a moisture adsorption amount of 5% or more at room temperature. Furthermore, the porous material is preferably selected to have an angle of repose of 50° or less, preferably 45° or less, more preferably 40° or less, and even more preferably 30° or less. For example, the angle of repose of CARiACT Q-10 (manufactured by Fuji Silysia Chemical Co., Ltd.), which is a type of porous silica, is 19° for particle sizes of 1.7-4.0 mm and 23° for 75-500 μm, and the angle of repose of CARiACT G-10 (manufactured by Fuji Silysia Chemical Co., Ltd.) is 35° for particle sizes of 0.35-1.7 mm.

In the chlorine dioxide generating device X of such a structure, by applying an external force to the outer container 10 to deform it, the easily destructible inner container 20 stored inside can be easily destroyed. At this time, the chlorite aqueous solution will flow out from the inner container 20 to the inside of the outer container 10. Since the outer container 10 is configured to discharge liquid through the opening 11a, the chlorite aqueous solution is discharged from the outer container 10 and contacts the solid composition 30 containing the acidic substance (second component), thereby generating chlorine dioxide gas. The chlorine dioxide gas generated in the bag-shaped body 40 is released to the outside of the bag-shaped body 40 from the air-permeable vent 41.

The place (smoking place) where the chlorine dioxide generating device X of the present invention is used is not particularly limited, and it can be used in, for example, a general household (living room or entrance, toilet or kitchen, etc.), and for industrial use (factory use), or in public facilities such as hospitals, clinics, and nursing institutions, schools, stations, and public toilets. In addition, it can be used not only in larger spaces such as indoor spaces where people can live, but also in small spaces such as refrigerators or shoe cabinets, and in cars (cars, buses, and trains). In this way, the size of the applicable space of the generating device of the present invention is not particularly limited, and it is preferably a closed space.

Since chlorine dioxide gas is highly soluble, in order to reduce free water in the reaction system as much as possible during the reaction, porous materials such as zeolite and silica gel are used as carriers. By reducing the free water in the reaction system, the reaction rate of acidic substances such as sulfuric acid and chlorite can be increased, and the amount of dissolved chlorine dioxide gas can be reduced. As a result, chlorine dioxide gas can be generated at a high concentration in a short time (temporarily). In this way, if the chlorine dioxide generating device X of the present invention is used, chlorine dioxide gas can be generated in large quantities and quickly. Therefore, the fumigation treatment time of the space in the fumigation room (people's avoidance time) can be shortened, and people can enter the fumigation room immediately after ventilation.

[Other embodiments] In the above embodiments, the description is made for the case where the chlorite aqueous solution 1 is sealed in the inner container 20 and the solid composition 30 containing the second component 2 of the acidic substance is used. In contrast, in the present embodiment, the description is made for the case where the aqueous solution of the second component 2 of the acidic substance is sealed in the inner container 20 and the solid composition 30 containing chlorite is used.

That is, the chlorine dioxide generating device X of another embodiment comprises: an outer container 10 which can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container 20 which is accommodated in the inner part of the outer container 10 and is used to seal the aqueous solution of the second component (acidic substance); a solid composition 30 which contains chlorite; and a bag-shaped body 40 which accommodates the outer container 10 and is provided with a breathable vent 41.

In the chlorine dioxide generating device X of such a structure, by applying an external force to the outer container 10 to deform it, the easily destructible inner container 20 stored inside can be easily destroyed. At this time, the aqueous solution of the acidic substance will flow out from the inner container 20 to the inside of the outer container 10. Since the outer container 10 is configured to discharge liquid through the opening 11a, the aqueous solution of the acidic substance is discharged from the outer container 10 and contacts the solid composition 30 containing chlorite, thereby generating chlorine dioxide gas. The chlorine dioxide gas generated in the bag-shaped body 40 is released to the outside of the bag-shaped body 40 from the air-permeable vent 41.

The acidic substances that can be used in this form can be the above-mentioned acidic substances. When sulfuric acid is used as the acidic substance, the concentration of its aqueous solution is preferably 30% by weight or less. In addition, the chlorite contained in the solid composition 30 in this form is preferably set to a final concentration of 30% by weight or less, preferably 20 to 25% by weight, which is better from the perspective of safety or stability, and the efficiency of generating chlorine dioxide gas. [Example]

[Example 1] Use the chlorine dioxide generating device X of the present invention to generate chlorine dioxide, and calculate the amount of chlorine dioxide gas generated. The chlorine dioxide generating device X is used to include: a polypropylene resin cylinder that can be deformed by applying an external force (outer container 10: Φ20, total length 150mm); a cylindrical glass ampoule for sealing a sodium chlorite aqueous solution (inner container 20: Φ8, total length 120mm); CARiACT Q-10 (particle size 1.7-4.0mm, manufactured by Fuji Silysia Chemical Co., Ltd.) impregnated with sulfuric acid as an acidic substance by a conventionally known method (solid composition 30), and a non-woven bag (bag-shaped body 40: 120mm × 200mm) for storing the resin cylinder. The outer container cover 11 formed with five openings 11a with a diameter of 2 mm is attached to both ends of the resin cylinder (outer container 10). The nonwoven bag (bag-shaped body 40) is made of a sheet made of Tyvek (registered trademark, manufactured by Du Pont) on the front and vinyl chloride resin on the back, and the two are heat-sealed in such a way that the sealing width of the peripheral portion 40a becomes 10 mm. In addition, the amount of sodium chlorite contained in the sodium chlorite aqueous solution is 890 mg, the amount of sulfuric acid contained in the solid composition 30 is 260 mg, and the theoretical value of the generated chlorine dioxide gas is 330 mg.

After the resin cylinder (outer container 10) is deformed from the outside of the non-woven bag (bag-shaped body 40) to destroy the glass ampoule (inner container 20) contained in the resin cylinder, it is quickly shaken up and down several times to make the sodium chlorite aqueous solution contact with the silica gel (solid composition 30) impregnated with sulfuric acid to generate chlorine dioxide gas. As shown in FIG2, the chlorine dioxide generating device X that is generating chlorine dioxide gas is immediately placed in a container 51 made of vinyl chloride, and the chlorine dioxide gas is dissolved in the potassium iodide aqueous solution (200 mL) contained in another container 52 to capture the chlorine dioxide gas. The capture is terminated at the time point set after the start of the reaction, and the amount of captured chlorine dioxide gas is calculated according to the following titration method. The results are shown in Table 1 and FIG3.

Titration method Take 5mL of potassium iodide aqueous solution containing chlorine dioxide gas and perform iodine titration with 0.1mol/L sodium thiosulfate solution under acidic conditions. Calculate the amount of chlorine dioxide gas (mg) captured in the potassium iodide aqueous solution according to the following calculation formula. Chlorine dioxide (mg) = titration amount × F × 1.349 ÷ 5 × 200 (F: factor of 0.1mol/L sodium thiosulfate solution) (1.349: 1mL of 0.1mol/L sodium thiosulfate solution corresponds to 1.349mg of chlorine dioxide)

As a result, the chlorine dioxide gas generated by the chlorine dioxide generating device X of the present invention reached a peak 30 minutes after the start of generation, and thereafter, it can be seen that the amount of chlorine dioxide gas generated slowly and continuously decreased. Since the amount of chlorine dioxide gas reached 86% of the theoretical value 30 minutes after the start of generation, it was confirmed that chlorine dioxide gas can be effectively generated in a short time.

[Example 2] In the chlorine dioxide generating device X of Example 1, the amount of sodium chlorite contained in the sodium chlorite aqueous solution was changed to 400-1200 mg, and the amount of sulfuric acid contained in the solid composition 30 was changed to 115-350 mg to generate chlorine dioxide, and the amount of chlorine dioxide gas captured was calculated. The results are shown in Table 2 and Figure 4.

As a result, in the chlorine dioxide generating device X, it was found that as the amount of sodium chlorite contained in the sodium chlorite aqueous solution increased, the amount of chlorine dioxide gas captured also increased as a linear function. In addition, since the reaction efficiency was almost 100%, it was confirmed that chlorine dioxide gas could be effectively generated in accordance with the theoretical value. Therefore, in the chlorine dioxide generating device X of the present invention, it was confirmed that the amount of chlorine dioxide gas to be generated could be easily adjusted by adjusting the amount of sodium chlorite contained in the sodium chlorite aqueous solution. [Industrial Applicability]

The present invention can be used in a chlorine dioxide generating device that generates chlorine dioxide gas by causing chlorite, which is a first component, to react with a second component that can react with the chlorite to generate chlorine dioxide gas.

X: Chlorine dioxide generator 1: Chlorite aqueous solution 2: Second component 10: Outer container 11: Outer container cover 20: Inner container 30: Solid composition 40: Bag 41: Ventilation part

FIG1 is a schematic diagram showing a chlorine dioxide generating device of the present invention. FIG2 is a schematic diagram showing a device capable of capturing chlorine dioxide gas. FIG3 is a graph showing the relationship between the capture time and the capture amount of chlorine dioxide gas. FIG4 is a graph showing the relationship between the amount of sodium chlorite and the capture amount of chlorine dioxide gas.

X: Chlorine dioxide generating device

1: Chlorite aqueous solution

2: Second ingredient

10: External container

11: External container cover

11a: Open

20: Inner container

30: Solid composition

40: Bag-shaped body

40a: Periphery

41: Ventilation section

Claims (8)

A chlorine dioxide generating device is provided, which generates chlorine dioxide gas by reacting a first component, chlorite, with a second component that can react with the chlorite to generate chlorine dioxide gas, and comprises: an outer container that can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container that is received inside the outer container and is used to seal a chlorite aqueous solution; a solid composition that contains the second component; and a bag. The bag-shaped body is used to store the outer container and is provided with a breathable air-permeable portion. The outer container and the inner container are configured as a tube, and the outer container cover is provided at both ends of the outer container, and the two ends of the inner container are respectively supported by the inner surfaces of the outer container cover provided at both ends of the outer container. The bag-shaped body is configured to be rectangular in a top view, and the air-permeable portion is configured to be planar. A chlorine dioxide generating device, which generates chlorine dioxide gas by reacting a first component, chlorite, with a second component that can react with the chlorite to generate chlorine dioxide gas, comprising: an outer container that can be deformed by applying an external force and is configured to discharge liquid; a destructible inner container that is housed inside the outer container and is used to seal the aqueous solution of the second component; a solid composition that contains the chlorite; and a bag-shaped body, which contains the aforementioned outer container and is provided with a breathable air-permeable portion, the aforementioned outer container and the aforementioned inner container are configured as a tube, and the outer container cover is provided at both ends of the aforementioned outer container, and the two ends of the aforementioned inner container are respectively supported by the inner surfaces of the aforementioned outer container cover provided at both ends of the aforementioned outer container, the aforementioned bag-shaped body is configured as a rectangular shape in a top view, and the aforementioned air-permeable portion is configured as a plane shape. As in claim 1 or 2, the chlorine dioxide generating device, wherein the aforementioned breathable portion is formed by processing the synthetic resin material into a non-woven fabric. As in claim 1 or 2, the chlorine dioxide generating device, wherein the aforementioned solid composition comprises a porous substance as a carrier. For a chlorine dioxide generating device as claimed in claim 1 or 2, the aforementioned solid composition is in granular form. For example, in the chlorine dioxide generating device of claim 1 or 2, the second component is an acidic substance. As in claim 6, the chlorine dioxide generating device, wherein the aforementioned acidic substance is sulfuric acid, and the aforementioned chlorite is sodium chlorite or potassium chlorite. As in claim 7, the chlorine dioxide generating device, wherein the concentration of the aforementioned acidic substance is less than 30% by weight, and the concentration of the aforementioned chlorite is 0.1-30% by weight.