JP2011188888A - Deodorant material, method of manufacturing the same, and deodorization device using the deodorant material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a water-resistant deodorant material having two adsorbing effects of physical and chemical adsorption at the same time. <P>SOLUTION: Powder of an inorganic porous body having the physical adsorbing effect and metal oxide powder having the chemical adsorbing effect, are used as deodorant base materials, and clay containing kaolinite and halloysite among kaolin minerals is used as a binder. Water is added to these materials and the materials are kneaded and molded. The molded product is baked and solidified at such a temperature as not to lose the activity of the metal oxide. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a deodorizing material for removing odor generated in a living environment and leading a comfortable life, a method for producing the deodorizing material, and a deodorizing apparatus using the deodorizing material.

Odors generally generated in the living environment include basics (ammonia, trimethylamine, etc.), acidic / fatty acids (isovaleric acid, acetic acid, butyric acid, etc.), sulfur compounds (hydrogen sulfide, captans (methyl mercaptan, ethyl) There are various unpleasant types of odors classified as mercaptans) and aldehydes (formaldehyde, acetaldehyde, etc.). And 22 types of specific malodorous substances are designated by government ordinance by the Malodor Control Law.
On the other hand, a deodorizing material (deodorizing apparatus) that removes these odors is required to be able to remove various odors only by circulating air at room temperature.
It can also be used in places with high humidity such as the rainy season or bathroom, or in places where it gets wet, such as places around the water such as toilets and kitchens, and it is safe to use without acid or alkaline substances. It is important.

  There are two methods for removing these odors at room temperature: physical adsorption by pores represented by activated carbon, and chemical adsorption by catalytic action of metal / active metal oxide or ozone. And depending on the kind of odor, it can be classified into those that can obtain a deodorizing effect by physical adsorption, such as a basic odor, and those that can obtain a deodorizing effect by chemical adsorption, such as a sulfur compound. Therefore, it is ideal to have both functions of physical adsorption and chemical adsorption.

For that purpose, it is only necessary to mix and use powders having respective adsorption roles. However, if such powders are left as they are, odors will not pass through and the powders will be scattered and put into containers for use. It was limited to deodorizing in a very narrow space that could be left alone. In the case of deodorization with ozone, there are problems such as ozone corroding and deteriorating the generating device and accompanied by ozone odor.
Accordingly, various methods have been considered for forcibly circulating odors and deodorizing them in order to efficiently use them over a wide area. For example, a deodorizing material is attached to some shape, for example, a method of carrying (attaching) a deodorizing material powder to a fibrous filter or a porous body, or a deodorizing material itself having a certain granular, pellet-like, or honeycomb-like solid The method of making it is devised.
For example, as a deodorizing material for removing bad odors such as ammonia and hydrogen sulfide, a material in which a metal oxide such as manganese dioxide, copper oxide, iron oxide or the like is carried on the surface of the honeycomb base material by a binder (binding material). It is known (see, for example, Patent Document 1).

  However, these methods must always use a binder, inevitably a decrease in performance is unavoidable, and the selection of the binder and the amount added are important factors that greatly affect the deodorizing performance. This is because when supported by a binder, the binder tends to block the pores of the porous ceramic and prevent adsorption, or cover the surface of the active metal oxide and prevent contact with odors. Because. If the amount of the binder is small, it will not be strong and will be damaged. On the other hand, when the amount of the binder is large, the performance is further deteriorated for the reason described above, and there is a problem that it is difficult to sufficiently exhibit the performance of the deodorizing material.

Furthermore, in the method of solidifying the deodorizing material itself, if it is solidified using an organic binder, the pores of the porous ceramic are also blocked to prevent adsorption, or the surface of the active metal oxide is covered and odor is generated. Disturb the contact. In addition, when this is fired, the organic binder is lost as CO ₂ by combustion, which is not good for global warming, and the strength after firing is remarkably reduced, and the powder is attached to the hand and scattered, resulting in poor handling. At the same time, water resistance cannot be expected. In addition, when an inorganic binder is used, the tendency is the same as that when an organic binder is used, but there is an advantage that the strength is ensured even when CO ₂ is not generated and when fired and solidified. However, when baked, there was a tendency that the activity of the metal oxide was largely lost due to the oxidation reaction. In order to suppress such an oxidation reaction, a method of mixing a reducing agent into the raw material, a method of filling a firing furnace with nitrogen or hydrogen and firing in a reducing atmosphere have been attempted.
In addition, among inorganic binders, there is a method of suppressing the oxidation reaction of a metal oxide by low-temperature firing using water glass or colloidal silica that can be fired and solidified at a relatively low temperature. However, these binders are not limited to blocking the pores of the porous ceramic and covering the surface of the metal oxide mostly depending on the amount added, so that both physical adsorption and chemical adsorption can be exhibited together. It was.
Since ancient times, clay has generally been used for ceramic products in order to give plasticity to improve moldability or as a role of a binder with other materials. Among these clays, the kaolin mineral kaolin and halloysite have the property that they do not condense upon dehydration at a low temperature of around 450 ° C, and are porous due to the irregular laminar irregular structure in the form of a plate (scale). It is well known academically that it does not block the pores. However, no attempt has been made to produce a deodorizing material having both physical adsorption and chemical adsorption effects in deodorization using such characteristics.

JP-A-10-314283

  The present invention has been made in view of the above-described problems of the prior art, and has two adsorption actions of physical adsorption and chemical adsorption at the same time and has water resistance, a method for producing the same, and the deodorizing material. An object of the present invention is to provide a deodorizing apparatus using the above.

In order to achieve the above object, the present invention uses a clay as a binder (binder), so that the properties of the clay do not block the pores of the porous body in the form of a plate (scale-like), and the low temperature. Focusing on solidifying by firing, not condensing, and suppressing the oxidation reaction of metal oxide as much as possible, devised to be able to exert both adsorption and desorption physical adsorption and chemical adsorption simultaneously Is.
The method for producing a deodorizing material of the present invention uses a powder of an inorganic porous material having a physical adsorption action as a deodorizing base material and a powder of an active metal oxide having a chemical adsorption action. The clay containing kaolinite and halloysite is mixed with water and kneaded and molded, and the molded body is fired and solidified at a temperature at which the activity of the metal oxide is not lost.
Examples of the inorganic porous material having a physical adsorption action include activated carbon, silica gel, activated clay, zeolite, alumina, diatomaceous earth, and siliceous shale.
In addition, as the metal oxide having the chemical adsorption action, each of manganese (Mn), cobalt (Co), copper (Cu), iron (Fe), zinc (Zn), aluminum (Al), titanium (Ti) Examples thereof include metal ions of oxide, platinum (Pt), vanadium (V), praseodymium (Pr), and chromium (Cr). The particle size of the metal oxide used in the present invention is 0.5 μm to 3 μm.

Among the kaolin minerals used as the binder, examples of the clay containing kaolinite and halloysite include cocoon clay and kibushi clay. And this clay may use the porous body (For example, siliceous shale powder) containing the clay containing the said kaolinite and halloysite other than using the above-mentioned clay, Kibushi clay, etc. That is, when the siliceous shale powder containing clay containing kaolinite and halloysite is used as the inorganic porous powder having a physical adsorption action as the deodorizing base material, and the clay content is sufficient, It is not necessary to mix glazed clay, Kibushi clay, etc. as the binder, and when the amount of clay contained in the siliceous shale powder is insufficient, the binder is used in an amount that compensates for the shortage. Of course, when the porous powder having a physical adsorption action does not contain clay containing kaolinite and halloysite, the clay is used as a binder. This binder is mixed in the range of 10 to 30% by weight with respect to the total powder (inorganic porous body powder, metal oxide powder, clay powder), and the particle size of the clay used in the present invention is 0.125 to 2 μm.
As the binder, an inorganic binder (water glass, colloidal silica, cement and gypsum) and an organic binder (polyethylene glycol, polyvinyl alcohol, methyl cellulose, glycerol, glycerin) are not used.

  The form of the molded body in which the inorganic porous body powder, the active metal oxide powder, and the clay containing kaolinite and halloysite are kneaded by adding water is preferably a sphere of φ5 mm, for example. However, the shape does not matter.

  Moreover, the temperature which bakes the said molded object shall be 400 to 500 degreeC which does not lose the characteristic of each component as much as possible, and 1 to 3 hours are suitable for baking time.

  Moreover, it is preferable that the deodorizing material is used as it is in a container (such as a bag or a box that can be vented) that can be vented. For example, a deodorizing apparatus is provided in which the deodorizing material is housed in a container having an opening that allows ventilation, and the container is provided with a fan to forcibly deodorize by circulating odors.

According to the above-mentioned means, the active body of the metal oxide is obtained by forming a molded body obtained by kneading and mixing the inorganic porous body powder and the active metal oxide powder with clay containing kaolinite and halloysite. By firing at a temperature that is not lost (400 ° C to 500 ° C), the adsorbed water of the clay component (water adsorbed on the particle surface out of the water contained in the clay mineral), interlayer water (of the clay mineral Water contained in the form of water molecules between layers), structural water (water contained in the form of OH in the clay mineral structure), and bound water (water present at the end of the octahedral sheet) are dehydrated and solidified. Deodorant with water resistance that does not condensate even when placed in water or moist air (excluding mineral interlaminar water, structural water, and bound water, and then returns to water when placed in moist air) Can be manufactured.
This is due to the fact that among kaolin minerals, kaolinite and halloysite clays can be dehydrated and irreversible at low temperatures (400 ° C to 500 ° C). A deodorizing material having both physical adsorption and chemical adsorption characteristics can be obtained by suppressing clogging due to oxidization and oxidation of the metal oxide.

The method for producing a deodorizing material of the present invention has both a porous body having a physical adsorption action used as a deodorizing substrate and a metal oxide having a chemical adsorption action without losing the respective adsorption characteristics, and has water resistance. The deodorizing material which it has can be manufactured easily.
Moreover, since the deodorizing material has both physical adsorption and chemical adsorption properties and water resistance, the deodorizing material can be used in a high humidity environment or in places around water such as a toilet or kitchen.
Furthermore, the deodorization apparatus accommodates the deodorizing material having both physical adsorption and chemical adsorption properties in a container having a ventable opening as it is, and is equipped with a fan so that the odor is circulated and physical adsorption and chemical adsorption. It is possible to efficiently deodorize by both actions.

The partially notched sectional view which shows an example of embodiment of a deodorizing apparatus. The schematic diagram which shows the mechanism of physical adsorption and chemical adsorption of a deodorizing material.

The method for producing a deodorizing material according to the present invention is a method in which a role component of physical adsorption and a role component of chemical adsorption are simultaneously molded and fired, and clay, particularly kaolinite of kaolin minerals, clay containing halloysite is low temperature. The clay is used as a binder (binder) by utilizing the property that it becomes irreversible when it is baked at around 450 ° C.
Examples of the clay include a plate-like (scale-like) property that does not block the pores of the porous body powder, and those that are solidified by low-temperature firing, such as galamite clay and kibushi clay. In addition to these, natural silicate porous bodies (for example, diatomaceous earth, siliceous shale, zeolite (zeolite), etc.) are also included. Therefore, the clay as a binder may be prepared separately for that purpose, but when the porous body is used as a component for physical adsorption, the clay contained therein is used as the binder. be able to. In addition, when only the clay component contained in the porous material used as a component for physical adsorption is less than the amount necessary for the binder, the clay is added separately.
The clay is added in the range of 10 to 30% by weight based on the total powder, and imparts plasticity to improve moldability. The clay has a particle size of 0.125 to 2 μm and is made larger than the pores of the porous body responsible for the physical adsorption action so as not to block the pores of the porous body. In addition, when the addition amount of the clay is less than 10% by weight, it cannot be expected to function as a binder and cannot be formed into a desired shape. Moreover, when the addition amount is 31% by weight or more, the amount of the deodorizing base material is decreased, and the deodorizing performance (physical adsorption, chemical adsorption) is lowered.

  And, as a deodorizing base material, using a powder of a porous body having a physical adsorption action and an active metal oxide powder having a chemical adsorption action, the clay and water are added to the deodorization base material and kneaded, It is molded into a desired shape, for example, a sphere having a diameter of 5 mm, and this is solidified by baking for 1 to 3 hours at a temperature of 400 ° C. to 500 ° C. at which the structure water of clay is removed and the activity of the metal oxide is not lost by oxidation .

  Examples of the porous body having a physical adsorption action include siliceous shale, diatomaceous earth, zeolite (zeolite), activated carbon, silica gel, activated clay, and alumina. The pores of the porous body are, for example, 2.2 to 7.5 angstroms for zeolite, 20 to 100 angstroms for diatomaceous earth and siliceous shale, and 10 to 200 angstroms for activated carbon. Smaller than particle size.

  Examples of the metal oxide having the chemical adsorption action include manganese (Mn), cobalt (Co), copper (Cu), iron (Fe), zinc (Zn), aluminum (Al), and titanium (Ti) oxides. , Platinum (Pt), vanadium (V), praseodymium (Pr), chromium (Cr) metal ions, and the like. Further, the particle size of the metal oxide is 0.5 μm to 3 μm and, like the clay, is larger than the pores of the porous body so as not to block the pores of the porous body.

Next, the contents considered about the influence on the physical adsorption of the binder (binder) are shown below.
[sample]
Silica shale powder (manufactured by Suzuki Sangyo Co., Ltd.) as an inorganic porous body for physical adsorption, iron oxide (Fe ₂ O ₃ ) powder (manufactured by Tohoku Silica Sand Co., Ltd.) as a metal oxide for chemical adsorption, Activated manganese dioxide (MnO ₂ ) powder (manufactured by Nippon Heavy Chemical Industry Co., Ltd.), clay (Mizuname clay) (manufactured by Maruishi Ceramic Industry Co., Ltd.) or water glass (Aichi Silica Industrial Co., Ltd.) as a binder ) Made with or without eyeset U-3), water was added to each of them and kneaded to form a sphere having a size of φ5 mm. The molded body was fired and solidified at a temperature of 450 ° C. for 3 hours to prepare a sample. The mixing ratio of each member is as shown in Table 1.
[Test method]
Measurement of the amount of NH ₃ adsorbed for 1 minute when a typical odor mainly removed by physical adsorption and NH ₃ with a concentration of 150 ppm is continuously aerated through a column filled with 10 cc of each sample at a flow rate of 6 L / min. did.
[result]
More NH ₃ is adsorbed on the inorganic porous material powder by physical adsorption, and is also chemisorbed on the metal oxide. In this result, the sample mixed with the inorganic porous material powder and the metal oxide powder is used by reducing the blending amount by about half compared to the sample used alone, so the adsorption amount is also reduced proportionally. is doing. Considering this point, clay hardly affects the adsorption action. However, the performance of water glass is greatly reduced with respect to inorganic porous materials and metal oxides. This is probably because water glass particles block the pores of the inorganic porous body and further cover the surface of the metal oxide, so that not only the physical adsorption action but also the chemical adsorption action is greatly affected.

Next, the content of the study on the effect of clay (binding material) on physical adsorption is shown below.
[sample]
Siliceous shale powder is used as the inorganic porous body for physical adsorption, clay (Sasame clay) is used as the binder, and the clay weight ratio to the total powder (siliceous shale powder, clay) is 0%, 10%, and 20 respectively. %, 30%, and 40%, 40% by weight of water was added to each, kneaded, and each was formed into a sphere having a size of φ5 mm. The molded body was fired and solidified at a temperature of 450 ° C. for 3 hours to prepare a sample. The mixing ratio of each member is as shown in Table 2.
[Test method]
Representative odor is removed mainly by physical adsorption, the NH ₃ concentration 150ppm in the column for each sample 10cc filling, NH ₃ when after three hours when aerated continuously with aeration 6L / min Was measured and expressed per hour.

[result]
As shown in Table 3, by adding clay, the proportion of the inorganic porous material powder in the sample decreases, and the amount of adsorption tends to decrease proportionally (for example, the amount of added clay is 30%, the inorganic porous material is Considering this point, it is considered that there is no effect on the physical adsorption action up to 30% addition of clay. In addition, it is more preferable to add more clay for improving plasticity and less clay for the physical adsorption action, but considering these, the amount of clay added is in the range of 10% to 30%. Is considered desirable.

Next, the contents of studying the influence of the firing temperature on physical adsorption and chemical adsorption are shown below.
First, the thermal characteristics of the raw material will be considered.
Differential thermal analysis (DTA) is performed on each of the inorganic porous material powder (siliceous shale powder), clay (Sasame clay), and metal oxide powder (manganese dioxide), which are the raw materials of the deodorizing material, and the weight accompanying the temperature rise We examined changes. The differential thermal analysis was measured using a differential type differential thermal balance TG-DTA smart loader TG-8120 manufactured by Rigaku Corporation at a heating rate of 10 ° C./min. The measurement results of each raw material are as shown in Tables 4 to 6.

It can be seen that moisture decreases quantitatively as the temperature rises.

Moisture decreases with increasing temperature. Decreases quantitatively up to 450 ° C (desorption of adsorbed water and interlayer water), abrupt decrease from 450 ° C to 550 ° C (dehydration of structural water and bound water), and dehydration is completed at 600 ° C or higher. .

It is considered that the decrease in weight accompanying the temperature increase is a manganese oxide that is oxidized by manganese dioxide and has no chemisorption performance. 3MnO ₂ + O ₂ → MnO ₂ + 2MnO + 2O ₂
As the temperature rises, it decreases quantitatively up to 500 ° C. It decreases rapidly from 500 ℃ to 600 ℃, 6
Above 00 ° C, the amount of decrease is 15% and is stable.

[sample]
45% by weight of siliceous shale powder as an inorganic porous material for physical adsorption, 2% by weight of iron oxide (Fe ₂ O ₃ ) powder and 8% of manganese dioxide (MnO ₂ ) powder as metal oxides for chemical adsorption %, 5% by weight of clay (Sasame clay) was added as a binder (10% by weight with respect to the total powder), 35% by weight of water was added and kneaded to form a sphere having a size of 5 mm. The green body was fired and solidified for 3 hours at unfired, 250 ° C., 350 ° C., 450 ° C., 550 ° C., and 650 ° C., respectively.
[Test method]
A typical odor mainly removed by physical adsorption action, NH ₃ was continuously aerated at a flow rate of 6 L / min through a column filled with 10 cc of each sample, and the amount of NH ₃ adsorbed after 3 hours was measured. Expressed per hour. Moreover, typical odor to be removed by chemical adsorption, and allowed to stand and poured into Tedler bag concentration 200ppm of H ₂ S capacity 10L were placed each sample 10g (standing test) after 1 hour of H ₂ S The removal rate was obtained and used as a standard for the adsorption performance of the sample. The results of the test are as shown in Table 7.

[sample]
Using siliceous shale powder as the inorganic porous material for physical adsorption, clay (Sasame clay) as the binder, 54% by weight of siliceous shale powder and 6% by weight of clay (10% by weight of the total powder) %), And 40% by weight of water was added thereto and kneaded to form a sphere having a size of φ5 mm. The green body was fired and solidified for 3 hours at non-fired, 250 ° C., 350 ° C., 450 ° C., 600 ° C., 700 ° C., 800 ° C., and 900 ° C. temperatures.
[Test method]
A typical odor mainly removed by physical adsorption action, NH ₃ was continuously aerated at a flow rate of 6 L / min through a column filled with 10 cc of each sample, and the amount of NH ₃ adsorbed after 3 hours was measured. Expressed per unit time. The results are as shown in Table 8.

  From the results shown in Tables 7 and 8, it is understood that the adsorption due to the physical adsorption action and the chemical adsorption action decreases as the firing temperature increases. However, the physical adsorption of the unfired product is slightly lower due to the influence of water contained in the clay. In Table 7, up to a firing temperature of 450 ° C., it is considered that the influence of the decrease in the chemisorption effect due to the progress of the oxidation of the metal oxide shown in Table 6 and the reduction of the active metal oxide is not observed. When the calcination temperature exceeds 550 ° C., the chemical adsorption action is reduced. This corresponds to the rapid weight reduction trend of the metal oxide in Table 6. Further, in Table 8, when the firing temperature is 600 ° C. or more, the physical adsorption action is significantly reduced. This corresponds to the dehydration of the moisture contained in the inorganic porous material powder and clay as shown in Tables 4 and 5. Therefore, it is considered that when the water runs out and the temperature is 600 ° C. or higher, the pores of the inorganic porous body are blocked for some reason such as melting, and the physical adsorption action is lowered. From this, it is desirable that the firing temperature be as low as possible, and it is considered that the firing temperature considered to exhibit both the physical adsorption and the chemical adsorption effectively is 500 ° C. or less.

Next, the contents of the examination on the influence of the firing temperature on the water resistance are shown below.
[sample]
45% by weight of siliceous shale powder as an inorganic porous material for physical adsorption, 2% by weight of iron oxide (Fe ₂ O ₃ ) powder and 8% of manganese dioxide (MnO ₂ ) powder as metal oxides for chemical adsorption %, 5% by weight of clay (Sasame clay) was added as a binder (10% by weight with respect to the total powder), 35% by weight of water was added and kneaded to form a sphere having a size of 5 mm. The molded body was fired and solidified at temperatures of 250 ° C., 350 ° C., 450 ° C., 550 ° C., and 650 ° C. for 3 hours, respectively, and used as samples.
[Test method]
Ten strengths were measured before each sample was immersed in water. Next, each sample was immersed in water for 24 hours, and the number of breakage and the state of each sample were observed. The results are shown in Table 9.

  From the results shown in Table 9, the strength before immersion increases as the firing temperature increases. However, after immersion, at a temperature of 350 ° C. or lower, it disintegrates in water, or powder adheres to the hand, and it is easily crushed by hand and inferior in water resistance. If the temperature is 450 ° C. or higher, a few cracks are generated in the solidified body due to strain, but there is no problem with water resistance. This is presumably because the kaolinite in the clay component and the water in the halloysite (adsorbed water, interlayer water, structural water, and bound water) are dehydrated and not condensed by baking at a temperature of 450 ° C. or higher. This corresponds to the tendency of the weight to decrease as the clay temperature rises in Table 5.

Examples of the present invention will be described below.
As a deodorizing substrate, 45% by weight of siliceous shale powder as an inorganic porous body for physical adsorption action, 2% by weight of iron oxide (Fe ₂ O ₃ ) powder as a metal oxide for chemical adsorption action, and manganese dioxide (MnO ₂ ) Add 8% by weight of powder, 5% by weight of kaolinite as a binder, 5% by weight of clay (Kamme clay) containing halloysite, and 35% by weight of water. This was formed into a sphere of φ5 mm, fired at a temperature of 450 ° C. for 3 hours, dehydrated and solidified to complete a deodorizing material.

  In order to compare the performance of the deodorizing material completed by the above method, a comparative example having properties only for physical adsorption was prepared. The deodorizing material of the comparative example uses siliceous shale powder as the inorganic porous material, clay (Sasame clay) as the binder, 54% by weight of siliceous shale powder, 6% by weight of clay (based on the total powder) 10% by weight), and 40% by weight of water was added thereto and kneaded to form a sphere having a size of 5 mm. The molded body was fired and solidified at 450 ° C. for 3 hours to prepare a sample.

[Test method]
Six typical odors generated in the living environment, ammonia (NH ₃ ) with a concentration of 200 ppm, hydrogen sulfide (H ₂ S) with a concentration of 200 ppm, trimethylamine ((CH ₃ ) 3N) with a concentration of 200 ppm, ethyl mercaptan with a concentration of 240 ppm ( CH ₃ CH ₂ SH), isovaleric acid (CH ₃ (CH ₂ ) ₃ COOH) with a concentration of 50 ppm, and formaldehyde (HCHO) with a concentration of 500 ppm were each injected into a 10 L Tedlar bag containing 1 g of each sample and allowed to stand. (Standing test) Each odor removal rate (%) after 3 hours was determined and used as a standard for the adsorption performance of the sample. The results are shown in Table 11.
[Odor measurement method]
Using a gas sampling device and a short-time detector tube manufactured by Gastec Co., Ltd., the initial concentration and the concentration after each lapse of time are measured by a predetermined procedure. The measured odors and the product numbers of the respective detector tubes are as shown in Table 10.

From the results shown in Table 11, basic adsorption (ammonia, trimethylamine) and aldehydes (formaldehyde) are removed by adsorption according to odors. It can be seen that sulfur compounds are removed by metal oxide chemisorption and fatty acids (isovaleric acid) are removed by physical adsorption. Thus, by using clay and baking at a low temperature, it is possible to remove various odors generated in the living environment. In addition, it is considered that the removal rate of the unfired sample is lower than that of the fired sample due to the influence of water contained in the clay.
In addition, the deodorizing material of the example having both physical adsorption and chemical adsorption characteristics can remove odors such as hydrogen sulfide and ethyl mercaptan in addition to the characteristics of the deodorizing material of the comparative example having only the physical adsorption function. I understand. Moreover, although the amount of inorganic porous body powder is small compared with the deodorizing material of a comparative example, the deodorizing material of an Example has the tendency which supplements the part by the chemical adsorption action of a metal oxide. This shows that the deodorizing material according to the present invention is more excellent.

Next, an example of an embodiment of a deodorizing apparatus B using the deodorizing material A according to the present invention will be described with reference to FIG.
The deodorizing apparatus B is configured to house a fan 5 driven by a motor 4 for forcibly circulating odor and a deodorizing material A inside a container 1 provided with an odor suction port 2 and a fresh air discharge port 3.

The container 1 is composed of a lower container 1a made of earthenware, a cylindrical upper container 1b placed on the lower container 1a, and a lid 1c attached to the upper surface opening of the upper container 1b. Has been.
A motor 4 and a fan 5 are disposed inside the lower container 1a via a support frame 6, and an odor suction port 2 for sucking odor into the container 1 by the action of the fan 5 driven and rotated by the motor 4 is provided on the peripheral wall. An appropriate number has been established.
The upper container 1b is formed in a cylindrical shape that can be connected and placed on the upper end of the lower container 1a. The deodorizing material A can be accommodated and held on the connection side, and the odor sucked into the lower container 1a is sent to the upper container 1b. A bottom plate 7 having a vent is provided.
The bottom plate 7 may be formed integrally with the upper container 1b or may be formed separately and detachable from the upper container 1b. The size of the air holes formed in the bottom plate 7 should be smaller than that of the deodorizing material A (for example, a sphere having a diameter of 5 mm) so that the deodorizing material A does not fall into the lower container 1a.
The lid 1c is attached to the upper opening of the upper container 1b, and has a fresh air discharge port 3 formed therein.

FIG. 2 is a schematic diagram showing a mechanism of deodorization (physical adsorption and chemical adsorption) by the deodorizing material A. The deodorizing material A is an inorganic porous body A1 of a deodorizing substrate, and a metal oxide (A2 and metal oxide A3 are clays). (Binding material) is formed into a sphere, and when there are odors such as ammonia (basic compounds), hydrogen sulfide (sulfur compounds), and formaldehyde (aldehydes), the inorganic porous material in the deodorizing material A Ammonia is physically adsorbed on the material A1, hydrogen sulfide is changed to sulfur and odorless sulfide by chemical adsorption (decomposition) by the metal oxide A2, and formaldehyde is oxidized by chemical adsorption (decomposition) by the metal oxide A3. And changed to hydrogen.
Thereby, the deodorizing material A is a deodorizing material having both physical adsorption and chemical adsorption characteristics.

The deodorizing material of the present invention and the deodorizing apparatus using the deodorizing material are not limited to the illustrated embodiment, and can be appropriately changed without departing from the gist of the present invention.
(1) In the embodiment, an example in which the container is composed of three members, that is, a lower container, an upper container, and a lid, is shown, but the present invention is not limited to this. For example, the container may be composed of two members or four members.
(2) In the embodiment, the example in which the container is made of earthenware has been shown, but the present invention is not limited to this, and the container may be made of synthetic resin or glass.

DESCRIPTION OF SYMBOLS A ... Deodorizing material A1 ... Inorganic porous body A2 ... Metal oxide A3 ... Metal oxide B ... Deodorizing apparatus 1 ... Container 2 ... Odor inlet 5 ... Fan

Claims (5)

  Using inorganic porous material powder with physical adsorption action and active metal oxide powder with chemical adsorption action as deodorizing base material, and using kaolin mineral-based clay containing kaolinite and halloysite as binder. Water is added to this, kneaded and molded, and the molded product is fired and solidified at a temperature at which the activity of the metal oxide is not lost, and has two functions of water resistance, physical adsorption and chemical adsorption. A method for producing a deodorizing material.   The method for producing a deodorizing material according to claim 1, wherein the binder is mixed in a range of 10 to 30% by weight with respect to the total powder.   The method for producing a deodorizing material according to claim 1 or 2, wherein the calcination solidification is performed at a temperature of 400 ° C to 500 ° C.   An inorganic porous material powder with a physical adsorption action and an active metal oxide powder with a chemical adsorption action are molded using a kaolin mineral-based clay containing kaolinite and halloysite as a binder, and fired A deodorizing material that is solidified.   An inorganic porous material powder with a physical adsorption action and an active metal oxide powder with a chemical adsorption action are molded using a kaolin mineral-based clay containing kaolinite and halloysite as a binder, and fired A deodorizing apparatus characterized in that the solidified deodorizing material is accommodated in a container having an opening that allows ventilation, and the container is provided with a fan.