JP2002370910A - Bactericidal agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bactericidal agent emitting chlorine dioxide by oxidation of a chlorite and extended in its active period. SOLUTION: This bactericidal agent comprises a chlorite and a majority of porous matter, for example, 0.2-10.0 wt.% of the chlorite and 60-99.7 wt.% of the powdery or granular porous matter. Thus, owing to the moisture- absorbing and moisture-conditioning functions of the porous matter, even at a humid place where the rate of oxidation of the chlorite is accelerated, the oxidation of the chlorite can be suppressed through keeping the humidity at low levels, therefore chlorine dioxide can be formed over a long period through delaying the rate of chlorine dioxide formation. Further, the porous matter adsorbes the chlorine dioxide gas and emits it as well, therefore even after ending chlorine dioxide formation by the oxidation of the chlorite, this degerming agent can retain its bactericidal power for a moderate period of time owing to the chlorine dioxide gas emitted from the porous matter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disinfectant capable of releasing (disinfecting) chlorine dioxide by releasing chlorine dioxide for a long period of time.

[0002]

2. Description of the Related Art It has been recognized that chlorine dioxide is excellent in sterilization and deodorization, and shows strong sterilizing power without generating harmful substances such as trihalomethane as in the case of chlorine sterilization. Chlorine dioxide can be produced, for example, by oxidation of chlorite such as sodium chlorite or reduction of chlorate such as sodium chlorite. However, chlorine dioxide is a gas having a high oxidizing power, and it is difficult to store it.In the past, chlorine dioxide was generated at the time of use.In recent years, for example, chlorine dioxide has been stabilized and stored as an aqueous solution, Various types of so-called stabilized chlorine dioxide have been developed, such as a gas or chlorine dioxide solution adsorbed on an adsorbent such as a porous substance and apparently powdered. Further, a mixture containing sodium chlorite and generating and releasing chlorine dioxide with the progress of a reaction such as oxidation in the air without using an apparatus is also known.

[0003]

By the way, for example, when chlorine dioxide is used for the purpose of suppressing the growth of various bacteria in refrigerators, storages, etc., and maintaining the freshness of fresh foods, it is difficult to use chlorine dioxide on site. A generator for producing chlorine dioxide is used, or the above-mentioned stabilized chlorine dioxide or the like which does not require a device is used. When a chlorine dioxide generator is used, equipment costs are increased, and maintenance such as replenishment of a chlorine dioxide precursor is required. Therefore, it is difficult to employ a chlorine dioxide in a small refrigerator or storage.

[0004] On the other hand, some stabilized chlorine dioxide and the like release chlorine dioxide into the air relatively slowly, for example,
If a device that releases chlorine dioxide, such as stabilized chlorine dioxide, placed in an air-permeable container such as a refrigerator or a storage (hereinafter, referred to as stabilized chlorine dioxide, etc.) is used, the refrigerator, Bacteria can be sterilized and deodorized in storages and the like. However, in the stabilized chlorine dioxide and the like, even if the release period of the chlorine dioxide is long, it is at most about several weeks, and in a refrigerator or a storage, etc. It is necessary to replace stable chlorine dioxide. Since frequent replacement is required, there is a problem that it is troublesome and the possibility of forgetting to replace becomes high.

It is an object of the present invention to provide a disinfectant which can be easily handled without requiring maintenance or the like and can release chlorine dioxide for a long period of time.

[0006]

The disinfectant according to the present invention comprises 0.2 to 10.0% by weight of chlorite and 60 to 98.7 of a powdery or granular porous material. % By weight.

[0007] According to the above configuration, chlorite is oxidized in the air to produce chlorine dioxide. A part is adsorbed by the porous substance contained in a large amount without being released from the agent to the outside. Further, the chlorine dioxide adsorbed on the porous substance is gradually released from the porous substance by exchange with an external substance or the like. From the above, the release of chlorine dioxide released from the mixture to the outside is delayed, and chlorine dioxide can be released over a long period of time. In addition, the generation of chlorine dioxide by chlorite is affected by the humidity in the air, and the higher the humidity, the more the generation is promoted. Is adjusted to be low, and the production rate of chlorine dioxide is reduced,
Chlorine dioxide can be produced and released over a long period of time. From these, for example, the disinfectant of the present invention comprises 8
As we can maintain sterilization power for more than a week,
For example, when used as a disinfectant for refrigerators and the like, it is possible to maintain the disinfecting power by exchanging once every two months, and the number of exchanges in a predetermined period is reduced as compared with conventional stabilized chlorine dioxide and the like. In addition, the trouble of replacement can be saved, and the possibility of forgetting to replace is reduced.

[0008] The porous substance may be any substance that does not react with chlorine dioxide or reacts slowly, but it is not preferable that the porous substance is immediately oxidized by chlorine dioxide.

[0009] The disinfectant according to claim 2 of the present invention is characterized in that it further contains 0.1 to 30% by weight of a salt excluding a hydrochloride salt.

According to the above configuration, by mixing a salt other than chlorite, the humidity around the chlorite is adjusted by, for example, the hygroscopicity of the salt and water of crystallization. It can promote the production of relatively slow chlorine dioxide due to relatively slow oxidation. That is, by adjusting the humidity around the chlorite with the salt and the porous substance, the generation rate of chlorine dioxide can be adjusted. Also, the salt functions as a catalyst to accelerate the chlorite oxidation reaction and regulate the chlorine dioxide release rate in relation to the slowing of the chlorine dioxide release rate by the porous material.

If the salt contains a salt of a weak acid, a part of chlorine dioxide and chlorite may be present as an aqueous solution due to the humidity in the air (for example, in the pores of a porous material). (When present as an aqueous solution), the aqueous solution can be made alkaline to stabilize the chlorine dioxide. In addition, as solid materials of sodium chlorite as chlorite, for example, those having a content of sodium chlorite of about 86% or more and those having a content of 76% or more are circulating, and are originally used as raw materials. Sodium chlorite
Although the above-mentioned salts are contained as impurities, it is also possible to add sodium chloride or the like.

[0012] The sanitizing agent according to claim 3 of the present invention is characterized in that the porous substance contains a desiccant such as silica gel and a porous mineral such as zeolite.

According to the above configuration, the porous substance is composed of a desiccant such as silica gel and a porous mineral such as zeolite, and both are porous substances. While small and highly hygroscopic, porous minerals such as zeolites have larger pore diameters and lower hygroscopicity than silica gel. Therefore, it seems that the humidity can be adjusted by adjusting the amounts of silica gel and zeolite. In addition, the release rate of adsorbed chlorine dioxide is considered to be different due to the difference in pore size, and the use of zeolite, which has a fast release rate, and silica gel, which has a slow release rate, has been considered for a long time. And stable release of chlorine dioxide.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a disinfectant according to an embodiment of the present invention will be described in detail. The disinfectant of this example contains 0.2 to 10.0% by weight of chlorite and 60 to 98.7% by weight of a powdery or granular porous substance. It is known that the chlorite is oxidized to release chlorine dioxide gas. Chlorite is also oxidized in the air and releases chlorine dioxide gas. At this time, it is known that the higher the humidity, the faster the release rate of chlorine dioxide gas. In the present invention, this chlorine dioxide gas is used for sterilization (sterilization) and deodorization.

The chlorite used in this example is, for example, sodium chlorite (NaClO ₂ ).
Metal salts such as potassium chlorite and barium chlorite can be used. The amount of chlorite mixed with the entire disinfectant is, for example, 0.1% as sodium chlorite.
If the amount is less than 0.2% by weight, a sufficient amount of chlorine dioxide gas cannot be generated, and the bactericidal power is insufficient. It is difficult to release chlorine dioxide. On the other hand, if the amount of chlorine dioxide is more than 10%, there is a problem that the chlorine dioxide concentration becomes too high at the beginning of use, and the irritating odor and chlorine odor become strong. Further, in order to generate chlorine dioxide gas over a long period, it is preferable that the content of sodium chlorite is 0.6% by weight or more.
It is preferred that the content be not less than% by weight.

Further, the content of sodium chlorite is preferably at most 6% by weight, more preferably at most 2% by weight, in order to minimize the irritating odor. On the other hand, a porous substance can capture water molecules in a large number of pores, has hygroscopicity, and, depending on the size of the pores, emits the captured water molecules to control humidity. Therefore, when mixed with chlorite, the humidity is adjusted so as to reduce the humidity around the chlorite, and the generation rate of chlorine dioxide generated by oxidation of chlorite is reduced. In addition, the porous substance can capture chlorine dioxide gas in its many holes and release the captured chlorine dioxide gas. Is released, and the release rate of chlorine dioxide gas released from the disinfectant can be delayed.

In this embodiment, silica gel and zeolite are used as porous materials. Silica gel is an amorphous xerogel formed by three-dimensionally and randomly bonded monosilicic acid, and the main component is silica (SiO 2).
₂ ). Silica gel is porous and functions as a dehumidifier. Silica gel has a cation exchange ability.

[0018] In addition, the zeolite, silica (SiO ₂₎
And alumina (Al ₂ O ₃ ) as a main component, but in fact, the alkali and alkali are formed in the vacancies in a three-dimensional network formed by (Al, Si) O ₄ tetrahedra sharing the vertices. It has a structure containing earth metal and water molecules. Zeolites are also porous substances. Note that silica gel has a smaller pore diameter than zeolite, and the difference in pore diameter allows adjustment of the humidity and chlorine dioxide gas concentration by changing the content of silica gel and zeolite.

The content of these porous substances with respect to the entire disinfectant is, for example, 60 to 98.7% by weight. When the content is less than 60% by weight, chlorine dioxide gas is sufficiently removed except for a dry environment. It is difficult to delay the occurrence,
If the amount is more than 99.7% by weight, the content of chlorite is insufficient in consideration of impurities and the like contained in sodium chlorite, and a sufficient amount of chlorine dioxide gas cannot be generated.

In order to delay the generation of chlorine gas even in an environment with high humidity, the content of the porous substance with respect to the entire disinfectant is preferably 70% by weight or more, and more preferably 78% by weight or more. Preferably, there is. In order to obtain a sufficient amount of chlorine dioxide gas in consideration of impurities contained in sodium chlorite and addition of salts such as sodium chloride described below, the content is preferably 95% or less. Further, it is preferably at most 88%. In addition, the ratio of silica gel to zeolite
May be only silica gel or only zeolite, for example, may be in the range of 1:10 to 10: 1.

It is preferable that both silica gel and zeolite are contained in consideration of the adjustment of humidity control and the release rate of the adsorbed chlorine dioxide gas, and these contents are changed according to the use conditions and the like. Is preferred. In addition, between silica gel and zeolite, zeolite is cheaper, and considering cost, it is preferable to increase the amount of zeolite compared to silica gel.

Further, a porous material other than silica gel or zeolite may be used. For example, a silica-based or silica-alumina-based porous material other than silica gel and zeolite may be used. It should be noted that a component composed of a component that is rapidly oxidized by chlorine dioxide cannot be used.

Further, in addition to the chlorite and the porous substance, a salt such as sodium chloride can be added to the disinfectant of this embodiment. The salt such as sodium chloride adjusts the humidity by its hygroscopicity, water of crystallization, deliquescent, etc., and in some cases, serves as a catalyst for chlorite oxidation. Even in a state, it has a function of ensuring the generation of chlorine dioxide due to oxidation of chlorite. The salt is, for example, the above-mentioned sodium chloride, but may be a metal salt of a strong acid such as sulfuric acid, hydrochloric acid or nitric acid, or a metal salt of a weak acid such as carbonic acid or citric acid. Further, a salt contained as an impurity of sodium chlorate used as a raw material may be used. Further, the salt is not always essential, and need not be added to the disinfectant.

The salt is preferably contained, for example, in the form of sodium chloride in an amount of 0.1 to 30% by weight in the disinfectant of this example. % Salt (not necessarily sodium chloride). In order to secure the generation of chlorine dioxide due to chlorite oxidation even at low humidity, 5
-20% by weight, preferably 10-10% by weight.
It is preferably contained at 16% by weight.

The method for producing a disinfectant is basically a method of mixing a chlorite in a solid form (eg, a powder, a granule, and a granule), a porous substance, and a salt. Incidentally, chlorite (sodium chlorite) is distributed, for example, in a state containing the above-mentioned salt as an impurity or an additive. They may be mixed. In addition, the method of using the disinfectant is a disinfectant that is a mixture of the above-described chlorite and a porous substance (for example, a powder or a mixture of powder and granules or granules),
For example, it is used by placing it in a container having air permeability and preventing leakage of the disinfectant, and placing the container in a refrigerator or storage.

The container may be, for example,
A container having flexibility and air permeability, such as a bag of nonwoven fabric, woven cloth, paper, or the like, in which the disinfectant is stored, and a box-shaped container for storing the container, having a large number of holes and slits, etc. It may have a double structure with a rigid container. Then, in the air-permeable container, the chlorite is gradually oxidized in the air to generate chlorine dioxide gas. At this time, the generation of chlorine dioxide gas by oxidation of chlorite in the air is affected by humidity, and in a high humidity state, the generation rate of chlorine dioxide gas increases, and the generation of chlorine dioxide gas is slow. Although it is difficult to maintain the disinfecting power over a long period of time due to the production, as described above, this disinfectant contains a large amount of a porous substance having a moisture absorbing and humidity controlling action, so that the humidity around the chlorite is high. This prevents generation of chlorine dioxide gas even in a humid state, and enables generation of chlorine dioxide gas for a long period of time.

Further, a part of the generated chlorine dioxide gas flows out of the container to remove bacteria by the chlorine dioxide gas.
Deodorization will be performed. In addition, part of the generated chlorine dioxide gas is absorbed and retained by the porous substance. Further, chlorine dioxide gas absorbed by the porous substance is gradually released from the porous substance due to replacement with surrounding substances, etc., while chlorine dioxide gas is generated from chlorite, The porous material absorbs the chlorine dioxide gas until it is almost saturated, while repeatedly absorbing and releasing the chlorine dioxide gas. Note that, depending on the concentration of the generated chlorine dioxide gas, the state may not be saturated.

Then, even after the generation of chlorine dioxide gas due to the oxidation of chlorite ends, the chlorine dioxide gas absorbed by the porous material is released from the porous material. Therefore, the disinfectant retains its disinfection and deodorizing ability even after the generation of chlorine dioxide gas due to the oxidation of chlorite is completed, and the amount of chlorine dioxide gas released from the porous substance is reduced. It can be used until it is greatly attenuated. Therefore, according to the disinfectant of this example, the use period can be not more than several weeks, but eight weeks or more, that is, two months or more. Thereby, the inside of the refrigerator or the storage can always be reliably kept in a sterilized state.

[0029]

The first embodiment of the disinfectant of the present invention will be described below. Note that the present invention is not limited to the following embodiments. The sanitizing agent of this embodiment has the following composition. Sodium chlorite (NaClO ₂ ) About 1.2% Sodium sulfate (NaSO ₄ ) About 0.2% Potassium carbonate (K ₂ CO ₃ ) About 0.5% Salt (NaCl) About 14.8% Silica (SiO ₂ ) About 16.7% alumina (Al ₂ O ₃ ) about 66.8%

In this example, a commercial product containing sodium sulfate and potassium carbonate as impurities of sodium chlorite and salt as an additive was purchased (note that sodium sulfate and potassium carbonate are silica gel). And impurities in zeolites). In this example, about 83.5% or more of silica gel and zeolite were added to this commercial product at a ratio of about 3: 7 to 1: 9, for example. 1 shows the content of silica and alumina in a mixture of silica and zeolite. The disinfectant is put in, for example, a bag having air permeability as described above, and is put in a box-shaped container having a plurality of slits made of synthetic resin.

Then, a test was conducted to measure the germicidal ability of the germicidal agent of this example as described below. 1. 0.05 ml of a bacterial solution (number of bacteria: 10 4 to 10 5) of the strain described below was spread on the surface of a plate of a standard agar medium in a petri dish using a spiral plater. 2. After the surface of the standard agar medium was dried, the dish was left in a refrigerator with the lid of the dish opened. 3. Two petri dishes were taken out each day and cultured, and the number of viable bacteria was measured. In addition, a petri dish containing a culture medium coated with the bacterium was newly prepared every week by the method described in 1 above. I did it across.

4. The disinfectant was immersed in water once a week and then placed near the outlet of the refrigerator. Since the test was performed with the refrigerator completely empty, the humidity in the refrigerator was extremely low (dry state). As a result, the amount of chlorine dioxide gas generated by sodium chlorite has become quite low,
In order to compensate for the humidity, an operation of applying a disinfectant to water in each container was performed. In addition, if something containing a lot of water such as produced food is stored in the refrigerator like a normal refrigerator,
The refrigerator does not dry. Then, the second
As shown in the embodiment, if the container is not in a dry state, a sufficient amount of chlorine dioxide gas is generated without having to put the container in water. In this test, it is highly probable that the use of water in the container temporarily increased the chlorine dioxide gas generation rate temporarily, thereby shortening the period of use.

5. The test strains are the following three strains. a. Escherichia coli NRIC 1023 b. Lactic acid bacteria Lactobacillus Plantarum IAM 1041 c. Culture temperature and culture time of each strain in Staphylococcus aureus IFO 12732 (P) 6.3 a. E. coli 35 ° C for 24 hours b. Lactic acid bacteria 30 ° C. for 72 hours c. Staphylococcus aureus 35 ° C 48 hours

Tables 1 and 2 show the results when Escherichia coli was used, Tables 3 and 4 show the results when lactic acid bacteria were used, and Tables 5 and 6 show the results when Staphylococcus aureus was used. The results for the case are shown. In each strain, the first table shows the results from the first lap to the fifth week, and the next table shows the results from the sixth lap to the tenth lap. Table 1
-In each week of Table 6, the viable cell count in the petri dish before putting in the refrigerator is shown as the first occurrence, and thereafter, the viable cell count after 1 to 7 days of the petri dish left open with the lid open is shown. I have. In the column next to the viable cell count, the ratio of the viable cell count when the initial viable cell count is set to 100% is indicated by% as the residual cell rate.

[0035]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

[Table 5]

[Table 6]

As shown in the above Tables 1 and 2, the disinfectant of this example shows an extremely strong disinfecting power against Escherichia coli from the 2nd to the 7th week and at the 1st week. Also, it has been shown to have sufficient eradication properties at 8 weeks to 10 weeks. Further, as shown in Tables 3 and 4, the disinfectant of this example showed an extremely strong disinfecting power against lactic acid bacteria from the first to eighth weeks, It has been shown to have sufficient eradication properties.

Further, as shown in Tables 5 and 6, the disinfectant of this example shows extremely strong disinfecting power against Staphylococcus aureus from the second to seventh weeks. Even at 1, 8 and 9 weeks, it has been shown to have sufficient eradication properties. In addition, since the inside of the empty refrigerator subjected to the experiment was extremely dry as described above, in the case of Escherichia coli and Staphylococcus aureus, the disinfecting power of the first week was lower than that of the second week and thereafter. Has become. In this experiment, the disinfectant was applied once a week to each case of water, showing sufficient bactericidal activity from the second week onward. Oxidation of the salt is too rapid, and a reduction in the bactericidal activity is seen at week 10.

From the above experimental results, it can be seen that the disinfectant of this example exhibits a sufficient disinfecting power until the ninth week, that is, for about two months. Further, it is expected that the period in which the bacteria can be removed can be further extended unless an operation such as applying a disinfectant to water is performed as described above.

Next, a second embodiment of the disinfectant of the present invention will be described. In the second embodiment, a disinfectant manufactured and packaged in the same manner with the same composition as the first embodiment is used. 1. Test Purpose The bacteria elimination agent of this example is examined for its elimination performance against various food poisoning bacteria (Escherichia coli, Salmonella, Vibrio parahaemolyticus).

2. Test contents-Performance test a. The food poisoning bacteria (Escherichia coli, Salmonella, Vibrio parahaemolyticus) are adjusted to a bacterial solution having an arbitrary concentration (10 ³ / ml, 10 ⁵ / ml),
1 ml of the bacterial solution is impregnated into a sterile duster (counter cloth) (2 cm × 2 cm) in a sterile petri dish. b. The disinfectant placed in the container of this embodiment is set in a low-temperature incubator with a humidity of 60%, and the petri dish adjusted in a is left at the same time. c. The petri dish is taken out at an arbitrary time and the number of bacteria is measured. In this case, bacteria attached to the duster,
The total number of bacteria obtained by wiping the petri dish is defined as the number of bacteria.

Target Tests The same tests as those for the performance tests a, b, and c are performed in a test plot where no disinfectant is installed.・ Chlorine dioxide concentration measurement Gastec GV-100s detector tube gas detector is used as a gas sampling device, and the detector tube is 8La for chlorine (measurement range 0.3
2 to 5.12 ppm) is used to determine the concentration of chlorine dioxide evolved from the disinfectant of this example.

3. Test environment Incubator used: Yamato Scientific Co., Ltd. IN-800
(Internal volume: 286 L) In the refrigerator, etc., as in the previous case, the humidity dropped extremely in the empty state, so in this test, a humidifier was placed in the incubator and the humidity was adjusted to about 60%. did. 4. Test method (1) Test strain Escherichia coli Escherichhia coli ATCC25922 Vibrio parahaemolyticus ATCC17802 Salmonella typhimurlum sm-1

(2) Preparation of bacterial solution a. The test strain was pre-enriched on a Trypticase ^(R) Soy Agar (BBL) plate, and one colony was enriched with tryptoase bouillon (Nissui Pharmaceutical) at 35 ° C for 24 hours.
This operation was performed for three consecutive days. (3) The bacterial solution obtained in viable cell count measured above culture fluid (2), the number of viable bacteria in each bacterial suspension was determined by 35 ° C. 48 h culture using a Trypticase ^(R) SoyAgar.

(4) Measurement of effect of disinfectant a. Commercially available sterile disposable petri dish (diameter 90m
m, depth: 15 mm), place three countercloths (2 cm x 2 cm) previously sterilized by an autoclave, and dilute with tryptosome bouillon to 10 ³ / ml and 10 ⁵ / ml. The bacterial solution was dropped. (One bacterial species per one dish) b. In a low temperature incubator,
The container was allowed to stand at the same time as the disinfectant was set, and the lid was opened. c. This is taken out every 24 hours for 7 days and the viable count is
It was determined by culturing at 35 ° C. for 48 hours using ypticase ^(R) Soy Agar.

D. This was done for eight consecutive weeks. e. At the same time, as a target test area, placed in a low-temperature incubator in a sealed state with a lid on the Petri dish of the above a,
The above c and d were performed. (5) Chlorine dioxide concentration measurement The chlorine dioxide concentration in the incubator was measured from the gas inlet of the incubator using the above-described measuring device.

5. Inspection results The inspection results are shown in Tables 7 to 23. Tables 7 to 11 show the results for E. coli, Tables 12 to 16 show the results for Vibrio parahaemolyticus, Tables 17 to 21 show the results for Salmonella, Table 2
Table 2 and Table 23 show the chlorine dioxide concentrations.

[0047]

[Table 7]

[Table 8]

[Table 9]

[Table 10]

[Table 11]

[Table 12]

[Table 13]

[Table 14]

[Table 15]

[Table 16]

[Table 17]

[Table 18]

[Table 19]

[Table 20]

[Table 21]

[Table 22]

[Table 23]

Each of the strains has shown sufficient eradication activity for 8 weeks. In the measurement of the number of bacteria this time, when the number of bacteria was 300 or less, it became impossible to measure due to the measurement conditions, so in the test with the original low bacterial concentration, the test group and the control Although there is a part where the difference is not clearly understood in the test with a higher bacterial concentration, a sufficient difference is seen between the test group and the control, and the disinfectant of this example shows a sufficient disinfecting ability You can see that. In addition, in the results of the table, after the third week, only the results with the higher bacterial concentration are shown.

In the chlorine dioxide concentrations shown in Tables 22 and 23, the chlorine dioxide measuring device used this time cannot detect chlorine dioxide, and the chlorine dioxide concentration is the lower limit of the measurement by this measuring device. It was found to be below 0.32 ppm. However, sufficient sterilization performance has been shown in this state, and if the concentration of chlorine dioxide can be reduced as much as possible in the state where the sterilization property is shown, problems such as pungent odor of chlorine dioxide do not occur, and it is rather preferable. Seem.

Further, the low concentration of chlorine dioxide means that the amount of chlorine dioxide released from the disinfectant is small and the release rate is low, and it is sufficient that chlorine dioxide can be released for a long period of time. Is to guess. From the results of the first and second examples, the disinfectant of the present invention releases chlorine dioxide not only for several weeks, but for several months (8 weeks or more) or more. To maintain the sterilization power.

[0051]

According to the present invention, in a disinfectant for oxidizing chlorite in air to produce chlorine dioxide, the release rate of chlorine dioxide is delayed by adding a large amount of a porous substance. Thus, the bactericidal power can be maintained for a period of several months or more. Therefore, the replacement period of the disinfectant becomes longer, and the labor required for disinfection by the disinfectant can be greatly reduced. In addition, the cost can be reduced by reducing the number of replacements of the disinfectant.

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Claims (3)

[Claims] 1. A disinfectant containing 0.2 to 10.0% by weight of chlorite and 60 to 99.7% by weight of a powdery or granular porous substance. 2. The method according to claim 1, wherein the salt excluding the hydrochlorite is 0.1 to 30.
The disinfectant according to claim 1, wherein the disinfectant is contained by weight%. 3. The disinfectant according to claim 1, wherein the porous substance contains a desiccant such as silica gel and a porous mineral such as zeolite.