KR20150144270A - Deodorization filter - Google Patents

Abstract

Provided in the present invention is a deodorizing filter which effectively deodorizes acetaldehyde which is a major stink ingredient, and formaldehyde, short chain fatty acid, and ammonia, which are toxic substances; and which is reduced with the re-emission of the odors. The deodorizing filter comprises an impregnated porous carrier impregnated with at least one kind of azole compound as a main ingredient. Or, the deodorizing filter comprises an impregnated porous carrier impregnated with at least one kind of azole compound and at least one kind of aromatic amine as main ingredients. It is preferable that the deodorizing filter additionally comprises non-impregnated porous carriers, and a ratio of the impregnated porous carriers and non-impregnated carriers should range from 7:3 to 9:1.

Description

DEODORIZATION FILTER

The present invention relates to a deodorant which effectively exhibits deodorization performance against aldehydes such as acetaldehyde, which contributes as an odor component, and formaldehyde, which is a harmful substance, low-fatty acid, and ammonia, To the provision of filters.

Of all the odorous ingredients, it is formaldehyde, which is known to cause physical damage (health) and health damage. For example, in China, where economic development is proceeding at a rapid pace recently, construction rush of housing, office building, and commercial facilities is continuing, and formaldehyde damage (sick house syndrome) from building materials, paints, adhesives, Is becoming very serious.

There is such a background as well, the health-oriented in the Asian region is increasing, and there is strong demand of the market for the function of improvement of the comfort of the space such as home, workplace, automobile and the like, and air for the purpose of removing the smell of pet, The spread of purification apparatuses is progressing. Air cleaners for household use, and air conditioners for automobiles. There is a growing demand for filters and the like, and the tendency of the filter to be smaller and lighter has been strengthened while maintaining the deodorization performance of the filter.

Conventionally, as a method for removing odor components, a filter using an adsorbent or an adsorbent, which is a porous carrier typified by activated carbon, has been used. In order to cope with the miniaturization and lightening of the filter, it is required to reduce the amount of the adsorbent used. In the filter using activated carbon, the activated carbon is deodorized by adsorbing the odor component. However, when the adsorption amount is saturated and the adsorbed odor component is released and re-released, There is a problem. In addition, with regard to aldehydes, since the deodorizing performance of activated carbon is inadequate, various impregnating agents have been investigated.

In Patent Documents 1 to 3, in order to exhibit effective deodorization performance with respect to aldehydes, lower fatty acids and the like, a deodorization filter containing a solid in which a hydroxylamine compound is carried, a particle carrying a hydroxylamine compound, Discloses a deodorization filter comprising deodorant particles obtained by copolymerizing a monomer component containing a monomer and a vinyl monomer having a nitrogen-containing aromatic ring.

Patent Document 4 discloses aminobenzenesulfonic acid as one of impregnating agents for removing acetaldehyde.

Patent Document 5 discloses a fabric carrying a deodorant composition containing a hydrazine derivative, porous fine particles and a binder resin. This fabric is capable of removing chemicals such as aldehydes, ammonia, acetic acid, and odorous substances without damaging the feel.

In these conventional deodorization techniques, it can not be said that the deodorization can be effectively effected by the limited amount of the porous carrier. Although it is also conceivable to compensate for the lack of performance by increasing the amount of the impregnated medicament, the increase of the impregnated medicament leads to clogging of the pores of the porous carrier such as activated carbon, and the performance of the porous carrier itself deteriorates. In addition, even if the initial odor component can be removed, there is a problem that indoor odor is not solved as a result of releasing the odor component again, and the filter itself becomes a source of strange odor.

Japanese Unexamined Patent Application Publication No. 2010-57955 Japanese Patent Application Laid-Open No. 2007-69198 Japanese Unexamined Patent Application Publication No. 2012-120637 Japanese Patent Application Laid-Open No. 07-136502 Japanese Patent Application Laid-Open No. 2005-76145

Disclosure of the Invention The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a high deodorizing performance for aldehydes such as acetaldehyde, which contributes as an odor component, and formaldehyde, which is a harmful substance, And to provide a deodorizing filter which dramatically suppresses the detachment from the filter.

By way of example,

[1] A deodorizing filter comprising an impregnated porous carrier impregnated with at least one azole compound as a main component,

[2] A deodorizing filter comprising an impregnated porous carrier impregnated with at least one azole compound and at least one aromatic amine as a main component,

[3] A deodorizing filter according to [1] or [2], further comprising a microporous porous carrier and having a mass ratio of the impregnated porous carrier and the microporous porous carrier in the range of 7: 3 to 9:

.

The present invention provides a deodorizing filter comprising a deodorization filter containing an impregnated porous carrier impregnated with at least one azole compound as a main component and a deodorant filter containing an impregnated porous carrier impregnated with at least one azole compound and at least one aromatic amine as a main component Filter and an impregnated porous carrier containing the impregnated porous carrier together with the impregnated porous carrier and having a mass ratio of the impregnated porous carrier to the non-impregnated porous carrier of 7: 3 to 9: 1. In addition, these deodorizing filters also suppress the problem of escape due to re-emission of odorous components from the filter that adsorbs the odorous components. Such a filter is preferentially used in air cleaning applications where higher performance is required.

Fig. 1 shows an external view of a deodorizing filter used in the embodiment.

Hereinafter, the components related to the deodorizing filter of the present invention will be described in detail.

The deodorizing filter [1] of the present invention is a deodorizing filter characterized by containing an impregnated porous carrier impregnated with at least one azole compound as a main component. The deodorization filter [2] of the present invention is a deodorization filter containing an impregnated porous carrier impregnated with at least one azole compound and at least one aromatic amine as a main component.

In the deodorization filter [1], since the impregnated drug contains only the azole compound impregnated with the impregnated porous body, the adsorption performance of the aldehyde species can be enhanced particularly. Particularly, since azole compounds having an amino group have high nucleophilicity of amine, the adsorption performance is particularly excellent.

In the deodorizing filter containing the impregnated porous body impregnated with only the aromatic amine as the impregnating agent, the nucleophilicity of the amine is lower than that of the azole compound due to the resonance effect, so that the adsorption performance of the aldehyde is somewhat lowered. However, The adsorption performance of other odor components tends to increase. Compounds in which an acidic functional group is directly bonded to aromatic rings of aromatic amines such as aminobenzenesulfonic acid and amino benzoic acid exhibit good adsorption of aldehydes when an acidic functional group is used as a proton type, The adsorption performance of the aldehydes is abruptly lost due to the influence of the π electron resonance of the acidic functional groups when the pH of the adsorbing atmosphere is in the neutral to basic range.

In the deodorization filter [1] containing the impregnated porous body impregnated with only the azole compound as the impregnation agent, the azole compound having a high reactivity is oxidized and the adsorption performance of the aldehyde is deteriorated in a short time depending on the use conditions of the filter . In the deodorization filter [2] containing an impregnated porous carrier impregnated with at least one azole compound and at least one aromatic amine as a main component, two kinds of compounds having different nucleophilicity are used, Is oxidized to prevent the adsorption performance of aldehydes from being deteriorated at a short time and also to compensate for the adsorption performance of odor components other than aldehydes. As a result, it is considered that adsorption of aldehydes and other odorous components such as lower fatty acids and ammonia can be achieved at the same time, and odorous components leaking out from the filter adsorbing odorous components will be reduced.

 The term "azole compound" means a compound in which at least one of the heteroatoms is a nitrogen atom, which is a 5-membered aromatic compound containing at least one heteroatom. Examples of the azole compound include diazoles, triazoles, tetrazoles and the like, and specific examples thereof include 3-methyl-5-pyrazolone, 1,3-dimethyl-5-pyrazolone, Pyrazolone compounds such as pyrazolone, 3-phenyl-6-pyrazolone and 3-methyl-1- (3-sulfophenyl) -5-pyrazolone, pyrazolone compounds such as pyrazole, 3-methylpyrazole, Aminopyrazole, 5-amino-3-methylpyrazole, 3-methylpyrazole-5-carboxylic acid, 3- Pyrazole compounds such as methyl pyrazole-5-carboxylic acid methyl ester, 3-methylpyrazole-5-carboxylic acid ethyl ester and 3,5-methylpyrazodicarboxylic acid, Triazole, 3-n-butyl-1,2,4-triazole, 3,5-dimethyl-1,2,4-triazole, 3,5-di- Triazole, 3-mercapto-1,2,4-triazole, 3-amino-1,2,4-triazole, 4-amino-1,2,4-triazole, Triazole, 5-amino-3-mercapto-1,2,4-triazole, 3-amino- Phenyl-1,2,4-triazole, 3,5-diphenyl-1,2,4-triazole, 1,2,4-triazol-3-one, Oxy-1,2,4-triazole), 1,2,4-triazole-3-carboxylic acid, 1-hydroxybenzotriazole, 5-hydroxy-7-methyl-1,3,8-triazine Methyl-1H-benzotriazole, 5-methyl-1H-benzotriazole and the like, 2-amino-5-ethyl-1,3,4-thiadiazole, 5- Amino-2-mercapto-1,3,4-thiadiazole, 2,5-dimercapto-1,3,4-thiadiazole, 5-t- 4-thiadiazole, 4-thiadiazole, 2-amino-5-methyl-1,3,4-thiadiazole and 2-amino-1,3,4-thiadiazole. Among them, 3-aminopyrazole, 5-amino-3-methylpyrazole, 3-amino-1,2,4-triazole, Amino-3-mercapto-1,2,4-triazole, 3-amino-5-phenyl-1,2,4-triazole, 5-ethyl-1,3,4-thiadiazole, 5-amino-2-mercapto-1,3,4-thiadiazole, 5-t- Thiadiazole, 2-amino-5-methyl-1,3,4-thiadiazole and 2-amino-1,3,4-thiadiazole are preferable, and 4-amino- Sol is more preferable. A plurality of kinds of azole compounds may be used as long as they do not impair the ability to adsorb and retain odorous components. It may also be used in combination with one or more kinds of other porous carriers.

The degree of attachment of the azole compound in the deodorization filter [1] is preferably 0.01 to 50% by mass, more preferably 0.5 to 10% by mass, of the porous carrier. When the impregnation amount is too small, the adsorption performance of the odor component may become insufficient. When the amount of impregnation is too large, the pores of the porous carrier may be blocked to deteriorate the adsorption performance of the odor component.

The degree of attachment of the azole compound in the deodorization filter [2] is preferably 0.01 to 50% by mass, more preferably 0.5 to 10% by mass, of the porous carrier. When the impregnation amount is too small, the adsorption performance of the odor component may become insufficient. When the amount of impregnation is too large, the pores of the porous carrier may be blocked to deteriorate the adsorption performance of the odor component.

 &Quot; An aromatic amine " means having an aromatic ring and an amino group. The aromatic ring may be any of a benzene ring, a naphthalene ring, an anthracene ring, a furan ring, and a pyridine ring. However, in consideration of adsorption of aldehydes or steric hindrance upon attachment to a porous carrier, benzene ring is preferable. Specific examples include aniline, toluidine, aniline phosphate, aniline hydrochloride, anthranilic acid, aminoethylbenzene, anisidine, naphthylamine, butyl aniline, phenetidine, aminophenyl acetic acid, benzenesulfonic acid, . A plurality of kinds of aromatic amines can be used as long as they do not impair the ability to adsorb and retain odorous components. It may also be used in combination with one or more kinds of other porous carriers.

The amount of the aromatic amine to be attached to the deodorization filter [2] is preferably 0.01 to 50 mass%, more preferably 0.5 to 10 mass%, of the porous carrier.

When the impregnation amount is too small, the adsorption performance of the odor component may become insufficient. When the amount of impregnation is too large, the pores of the porous carrier may be blocked to deteriorate the adsorption performance of the odor component.

The total amount of the azole compound and aromatic amine to be added to the deodorizing filter [2] is preferably 0.02 to 100 mass%, more preferably 1.0 to 20 mass%, of the porous carrier. When the impregnation amount is too small, the adsorption performance of the odor component may become insufficient. When the amount of impregnation is too large, the pores of the porous carrier may be blocked to deteriorate the adsorption performance of the odor component.

In the deodorization filter [2], the ratio (molar ratio) of the aromatic amine and the azole compound as the impregnating agent differs depending on the required deodorizing performance. In general, the aromatic amine: azole compound is preferably in the range of 1:10 to 10: 1. With this range, adsorption of aldehydes and other odor components such as lower fatty acids and ammonia can be more easily achieved, and odor components can be less leached from the filter adsorbing odor components.

The deodorizing filter according to [1] or [2], further comprising a microporous porous carrier and having a mass ratio of the impregnated porous carrier to the microporous porous carrier in the range of 7: 3 to 9: 1, (Dispersing force, van der Waals force) acting between the porous carrier and the porous carrier, and physically adsorbs the odor component. Although the physical adsorption is reversible, by using a porous carrier having a small pore diameter, that is, a low degree of activation, it is possible to prevent desorption, so that by adding a certain amount of a poured porous carrier, I think.

The mass ratio between the impregnated porous carrier and the not-added porous carrier can be increased or decreased according to the level of the odor to be removed, but is preferably in the range of 7: 3 to 9: 1. If the ratio of the impregnated porous carrier to the total mass of the impregnated porous carrier and the notched porous carrier is less than 70% by mass, the desired high deodorizing performance may not be obtained. When the proportion of the impregnated porous carrier is more than 90% by mass, the effect of suppressing the release may not be substantially different from that of the case of only the impregnated porous body.

The porous carrier used in the present invention is not particularly limited as long as it has many pores. Examples of the porous carrier include inorganic porous carriers such as activated carbon, sepiolite, pallyrite skate, zeolite, activated carbon fiber, activated alumina, sepiolite mixed silica gel, activated silica gel, active white clay, vermiculite, diatomaceous earth, An organic porous carrier such as a porous carrier may be used. Among these porous carriers, activated carbon is preferable because it has excellent adsorption ability to various odor components, particularly aldehydes.

The shape of the porous carrier is not particularly limited as long as the odorous component can be contacted. For example, a porous carrier of a pellet shape, a purchaser shape, a powder shape, a honeycomb shape, or a fibrous shape can be used. However, the type and shape of the porous carrier used in the present invention are selected depending on the type of the odor component to be removed or depending on the location of the deodorization filter.

The specific surface area of the porous support for impregnating the impregnating agent is preferably 500 to 2000 m ² / g, more preferably 1000 to 1900 m ² / g, and still more preferably 1200 to 1500 m ² / g. A porous carrier having a high degree of resilience is preferable in that it has a wide ability to adsorb various odor components. However, if the resorption increases, the pore diameter becomes large and the adsorbed odor component tends to be easily removed. . The porous carrier having a specific surface area of less than 500 m ² / g is a porous carrier having a low level of resilience and has a small pore diameter and small pore volume, and the adsorption performance of the porous carrier is remarkably lowered when the impregnated carrier is attached . This is believed to be due to the occlusion of pores having a small diameter by the impregnation of the impregnating agent.

The specific surface area of the porous support used as the microporous porous support is preferably 1000 m ² / g or less. A porous carrier having a small pore diameter generally has a small fraction of desorbing (releasing) odor components physically adsorbed. Therefore, when the desorption of the adsorbed component is to be suppressed, a porous carrier having a small pore diameter may be selected. If the specific surface area is larger than 1000 m ² / g, the possibility that the adsorbed odor component will separate is increased.

1, the deodorization filter of the present invention is constituted by sealing a porous carrier on a porous support body 1 (hereinafter referred to as " support body "), And is covered with the cover material 2. Fig. Fig. 1 (A) is an overall external view of a deodorizing filter, and Fig. 1 (B) is an enlarged external view. The support member 1 and the cover member 2 are preferably made of a heat-sealable material. And the both are heat-welded to enclose the porous carrier (clipped). The cover member 2 is preferably made of PP or polyethylene terephthalate (PET). The cover member 2 is preferably made of acrylonitrile-butadiene-styrene copolymer resin (ABS resin) or polypropylene Do.

By this means, it is possible to prevent direct contact with the porous carrier, and to obtain a deodorizing filter capable of preventing the porous carrier from protruding to the outside.

As another means, there is no problem in that the support 1 is made of a material other than resin, or metal. In the case of paper or metal, it is also possible to apply an adhesive such as hot melt to the support member 1 and weld it to the cover member 2.

As another means, it is also possible to adopt a configuration in which the four sides of the filter are fused with a paper frame or a resin frame such as PP to seal the porous carrier.

The support body 1 has a lattice shape, and the lattice shape of the opening portion may be any shape as long as it is a ventilable shape such as a circle, a polygon having a triangle or more, a diamond shape, a crushed shape, or the like. Further, by changing the density of the lattice, the filling mass of the porous carrier and the pressure loss of the deodorizing filter can be adjusted.

When the porous carrier is sealed in the support 1, it is preferable to take care to make it uniform. Unless the porous carrier is uniformly distributed, the frequency of contact between the porous carrier and the odor component may be biased and the desired deodorizing performance may not be achieved.

The support 1 has a grid dimension of 5 to 50 mm on one side in the case of a polygonal shape and 5 to 20 mm in diameter in the case of a circular shape. If it is less than the minimum dimension, it is difficult to fill the porous carrier, and the pressure loss tends to increase. On the other hand, if the maximum size is exceeded, it becomes difficult to effectively distribute the porous carrier, and the frequency of contact between the porous carrier and the odorous component may be biased to fail to reach the target deodorizing performance. The thickness of the support 1 between the grids is preferably 0.5 to 2 mm.

The particle size of the porous carrier in the present invention is preferably 4 to 40 mesh, more preferably 5 to 8 mesh. If it is less than 4 meshes, it may be difficult to efficiently insert the porous carrier into the cells of the support 1. Conversely, if the mesh size exceeds 40 mesh, the number of porous carriers overflowing from the mesh of the cover material 2 increases, The dirt due to the porous carrier attached to the cover material 2 may be increased.

With respect to the amount of the porous carrier to be charged into the lattice of the support 1, a filling amount occupying 50 to 80% with respect to the volume in the lattice is preferable. If it is less than 50%, the porosity in the lattice becomes high and the appearance may be deteriorated. On the other hand, if it exceeds 80%, ventilation becomes difficult, and the pressure loss of the filter may be increased.

[Example]

Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited to the examples. In the following Examples and Comparative Examples, "% " is " mass% " unless otherwise specified.

The preparation of deodorizing filters used in the following examples and comparative examples and their various evaluations were carried out as follows.

Fig. 1 shows an external view of a deodorizing filter used in this embodiment.

≪ Example 1 >

The deodorization filter of Example 1 was prepared in the same manner as in Example 1 except that 4-amino-1,2,4-triazole (Wako Junyaku Kogyo Co., Ltd.) having a concentration of 4000 ppm 190 g of impregnated activated carbon (impregnated carbon, 5 to 8 mesh) was sealed and then thermally welded with a cover material (2) of PP. Hereinafter, the activated carbon impregnated with the impregnated drug may be described as " impregnated carbon ".

≪ Example 2 >

In the deodorization filter of Example 2, 4-amino-1,2,4-triazole (manufactured by Wako Pure Chemical Industries, Ltd.) with a concentration of 4000 ppm was adhered to the support 1 (PP) of the hexagonal honeycomb molded by injection molding (5 to 8 mesh) and untreated activated carbon (unlabeled carbon, 5 to 8 mesh) at a mass ratio of 9: 1 and then thermally welded to the net of the cover material (2). Hereinafter, the activated carbon to which the impregnated drug is not impregnated may be referred to as "not added carbon ".

≪ Example 3 >

In the deodorization filter of Example 3, 4-amino-1,2,4-triazole (manufactured by Wako Pure Chemical Industries, Ltd.) with a concentration of 4000 ppm was adhered to the support 1 (PP) of the hexagonal honeycomb molded by injection molding (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) at a mass ratio of 8: 2 to 190 g and then thermally welded to the net of the cover material (2).

<Example 4>

In the deodorization filter of Example 4, 4-amino-1,2,4-triazole (manufactured by Wako Pure Chemical Industries, Ltd.) with a concentration of 4000 ppm was adhered to the support 1 (PP) of the hexagonal honeycomb molded by injection molding (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) at a mass ratio of 7: 3 and then thermally welded with a cover material (2) of PP.

&Lt; Example 5 >

In the deodorization filter of Example 5, 4-amino-1,2,4-triazole (manufactured by Wako Pure Chemical Industries, Ltd.) with a concentration of 4000 ppm was adhered to the support 1 (PP) of the hexagonal honeycomb molded by injection molding (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) at a mass ratio of 6: 4 in 190 g, and then thermally fused with a net of PP, which is a cover material (2).

&Lt; Example 6 >

In the deodorization filter of Example 6, 4-amino-1,2,4-triazole having a concentration of 4000 ppm and p-amino benzoic acid having a concentration of 4000 ppm (Tokyo Kaseko Co., Ltd.) 190 g of impregnated activated carbon (5 to 8 mesh) was sealed in a cover material (2), and the cover material (2) was thermally welded to the net.

&Lt; Example 7 >

The deodorization filter of Example 7 was produced in the same manner as in Example 7 except that 4-amino-1,2,4-triazole having a concentration of 4000 ppm and p-amino benzoic acid having a concentration of 4000 ppm (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) in a mass ratio of 9: 1 and then thermally fused with a net of PP which is a cover material (2).

&Lt; Example 8 >

In the deodorization filter of Example 8, 4-amino-1,2,4-triazole having a concentration of 4000 ppm and p-amino benzoic acid having a concentration of 4000 ppm (Tokyo Kaseoko Co., Ltd.) (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) at a mass ratio of 8: 2 and then thermally fused with a net of PP as the cover material 2.

&Lt; Example 9 >

The deodorization filter of Example 9 was prepared by mixing 4-amino-1,2,4-triazole at a concentration of 4000 ppm and p-amino benzoic acid at a concentration of 4000 ppm (Tokyo Kaseoko Co., (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) in a mass ratio of 7: 3 and then thermally fused with a net of PP as a cover material (2).

&Lt; Example 10 >

The deodorization filter of Example 10 was produced in the same manner as in Example 10 except that 4-amino-1,2,4-triazole at a concentration of 4000 ppm and p-amino benzoic acid at a concentration of 4000 ppm (5 to 8 mesh) and unlabeled carbon (5 to 8 mesh) impregnated at a mass ratio of 6: 4 (190 g) and then thermally welded with a cover material (2) of PP.

&Lt; Comparative Example 1 &

The deodorization filter of Comparative Example 1 was prepared by adding activated carbon (5 to 8 mesh) impregnated with p-amino benzoic acid (manufactured by Tokyo Kasegokyo Co., Ltd.) having a concentration of 4000 ppm to a support (1) And then thermally fused with a net of PP, which is the cover material 2.

&Lt; Comparative Example 2 &

The deodorization filter of Comparative Example 2 was prepared by filling 190 g of unlabeled carbon (5 to 8 mesh) into a support (1) (PP) of a hexagonal honeycomb molded by injection molding and then thermally fusing the cover material (2) .

&Lt; Comparative Example 3 &

The deodorization filter of Comparative Example 3 was produced by the same method as in Example 1 except that activated carbon (5 to 8 mesh) impregnated with p-amino benzoic acid (manufactured by Tokyo Kasei Kogyo Co., Ltd.) with a concentration of 4000 ppm was applied to a support (1) (5 to 8 mesh) at a mass ratio of 8: 2, and then thermally fused with a net of PP, which is a cover material (2).

 [Evaluation of deodorization performance]

The deodorizing performance of the deodorizing filter obtained as described above was evaluated as follows. The deodorizing filter was mounted on the air purifier and was installed perpendicular to the wind flow direction. Aldehyde, ammonia and acetic acid were simultaneously injected into the box of 4 m ³ as an odor component, and the air purifier placed in the box was operated at a rated air flow rate. At this time, the concentration in the box was set to 10 ppm. One measurement time was 30 minutes, and the concentration of each gas before measurement and the concentration of gas after 30 minutes were measured.

Concentration control in the box is carried out using a detector tube (Gas Tech Co., Ltd., No. 92L; acetaldehyde, No. 3L; ammonia, No. 81L; acetic acid). The temperature inside the box shall be 25 ± 5 ° and the relative humidity shall be 50% or less. The removal rate is represented by the removal rate = {Ab-Aa} / Abx100 when the concentration Ab of the odor component before the start of operation of the air cleaner and the concentration Aa after the start of operation.

The removal rates of acetaldehyde, ammonia, and acetic acid adsorbed by each deodorization filter are shown in Table 1. , &Quot;? &Quot;, &quot;? &Quot;, &quot;? &Quot;, &quot; Respectively.

 [Evaluation of deviation]

The deodorizing filter was evaluated by sensory evaluation using a deodorizing filter mounted on an air cleaner used in a living room from 9:00 to 17:00 for 3 months for evaluation. The air purifier was operated at the rated air flow rate. The odor intensity leaking from the deodorization filter (odor intensity) was evaluated in six stages by five persons. The results are shown in Table 1. The odor intensity was judged to be 0: odorless, 1: barely recognizable odor, 2: weak odor, 3: easily recognizable odor, 4: intense odor, 5: intense odor.

[Assessment of durability (life) of tobacco]

Evaluation of tobacco durability (life) of the deodorizing filter can be comparatively examined by a test of JEMA1467 of Japan Electrical Manufacturers Association. The deodorizing filter was mounted on the air purifier and was installed perpendicular to the wind flow direction. Five cigarettes were burned in a box of 1 m ³ , and an air purifier placed in a box was operated at a rated air flow rate. Then, the concentration of each odor component was measured, and the removal rate of each odor component was obtained based on the measured value.

Here, each removal rate is represented by the removal rate = {Bb-Ba} / Bbx 100, where Bb is the concentration of the odor component before the operation of the air cleaner is started, and Ba is the concentration after starting the operation of the air cleaner.

Removal efficiency η ₁ (%), the removal rate of acetaldehyde η ₂ (%) of the ammonia, when the removal rate η ₃ (%) of acetic acid, represented by the total removal efficiency _{η = (η 1 + 2η 2} + η 3) / 4 . The test is repeated until the total removal rate reaches 50%, and the results are shown in Table 1 by the number of practical durabilities calculated by multiplying the number of test pieces K of the required cigarette by the actual usage coefficient 40. [

From the results of Examples 1 and 6 and Comparative Examples 1 and 2, the deodorizing filter of Comparative Example 1 in which the aromatic amine is impregnated with the impregnated carbon as the main component has a low deodorization performance of acetaldehyde, Respectively. In addition, the deodorizing filter of Comparative Example 2 containing no added dust had low deodorization performance of acetaldehyde, ammonia and acetic acid. On the other hand, since the deodorizing filter of Example 1 contains the impregnated carbon impregnated with the azole compound as the main component, it has an effect of rapidly deodorizing acetaldehyde within 30 minutes, and the deodorizing performance of acetic acid is also good. Further, since the deodorization filter of Example 6 contains the impregnated carbon in which the azole compound and the aromatic amine are impregnated as the main component, it has an effect of quickly deodorizing acetaldehyde, ammonia and acetic acid within 30 minutes, The effect that the strength was low was obtained.

From the results of Examples 1 to 5, it can be seen that, in Examples 2 to 4, in which the azole compound contains impregnated charcoal impregnated as the main component and the unlabeled carbon, and the mass ratio of the impregnated carbon to the unlabeled carbon is in the range of 7: The deodorization filter obtained the results that the deodorization performance of acetaldehyde and acetic acid was good and the offensive odor intensity was low.

From the results of Examples 6 to 10, it can be seen that, in Example 7, in which the azole compound and the aromatic amine are impregnated as the main component and the weight ratio of the impregnated carbon to the notched powder is in the range of 7: 3 to 9: The deodorization filters of ~9 resulted in good deodorization performance of acetaldehyde, ammonia and acetic acid, and low odor intensity of off-gases.

From the results of Examples 3 and 8 and Comparative Example 3 in which the mass ratio of the impregnated carbon to the notched powder was 8: 2, the deodorization filter of Comparative Example 3 containing the impregnated charcoal impregnated with the aromatic amine as the main component contained acetaldehyde, The deodorization performance of ammonia and acetic acid is low, and the offensive odor intensity is also high. On the other hand, the deodorization filter of Example 3, in which the azole compound contains impregnated carbon as a main component, has high deodorization performance of acetaldehyde and acetic acid, particularly good deodorization performance of acetaldehyde, The result was low. Further, the deodorization filter of Example 8, in which the azole compound and the aromatic amine were impregnated with the impregnated carbon as the main component, showed a good deodorization performance of acetaldehyde, ammonia and acetic acid, and a lower odor intensity of the desorption .

The evaluation of the tobacco durability showed a positive correlation with the result of the deodorizing performance, and the higher the deodorizing performance, the more the practical endurance (the life of the deodorizing filter became longer). That is, from the results of Examples 1 and 6 and Comparative Examples 1 and 2, it was found that the deodorizing filter of Comparative Example 1 containing the impregnated carbon with aromatic amine impregnated as the main component and the deodorizing filter of Comparative Example 2 containing the untreated carbon , The deodorizing filter of Example 1 containing the impregnated carbon as the main component of the azole compound and the deodorizing filter of Example 6 containing the azole compound and the impregnated carbon impregnated with the aromatic amine as the main component had a large number of practical endurance .

From the results of Examples 1 to 5, it can be seen from the results of Examples 1 to 5 that, in the deodorization filter containing the impregnated charcoal impregnated with the azole compound as the main component and the unlabeled carbon, the higher the ratio of the impregnated carbon, the greater the practical endurance, .

It can be seen from the results of Examples 6 to 10 that the higher the ratio of the impregnated carbon in the deodorizing filter containing the impregnated charcoal impregnated with the azole compound and the aromatic amine as the main component and the untreated charcoal, the more the practical endurance is increased, .

From the results of Examples 3 and 8 and Comparative Example 3 in which the ratio of the impregnated carbon to the untouched carbon is 8: 2, the azole compound is superior to the deodorizing filter of Comparative Example 3 containing the impregnated charcoal impregnated with aromatic amine as the main component The deodorization filter of Example 3 containing the impregnated carbon impregnated as the main component has a longer life and the deodorization filter of Example 8 containing the azodic compound and the amine impregnated with the aromatic amine as the main component has a longer life . It is considered that the reason why the precise principle of the water repellency is unclear is that it is possible to adsorb acetaldehyde, acetic acid, and ammonia, which are the target gases of the JEMA standard, in a well-balanced manner over a long period of time by attaching two kinds of compounds.

INDUSTRIAL APPLICABILITY The filter of the present invention can be widely used in air purifying applications requiring high deodorizing performance and reduction of odor re-emission (release), and is useful as a deodorizing filter used in air cleaners, .

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Claims (3)

Characterized in that it contains an impregnated porous carrier impregnated with at least one azole compound as a main component. Characterized in that it contains an impregnated porous carrier in which at least one azole compound and at least one aromatic amine are impregnated as a main component. 3. The method according to claim 1 or 2,
Wherein the mass ratio of the impregnated porous carrier to the non-porous porous carrier is in the range of 7: 3 to 9: 1.

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