JP2008132089A - Tobacco deodorizing filter and manufacturing method thereof - Google Patents

Abstract

The present invention provides the following means in order to provide a filter having a greater deodorizing effect, immediate effect, and durability, particularly with respect to tobacco odor among bad odors.
An inorganic amine compound, a water-insoluble hydrazine compound, activated carbon, and natural pulp are added to water to form a water slurry, and the slurry is adjusted to a predetermined solid content concentration while stirring, and then a cationic system. Polymer or anionic polymer is added, and the resulting aggregate aqueous dispersion is made into a sheet by a wet paper making method using a paper machine, dried to obtain a mixed paper, and then the mixed paper is put into a corrugating machine. Provided is a deodorizing filter that can be expected to have a great deodorizing effect on tobacco odor by using the filter shape.
[Selection figure] None

Description

  [Technical Field] The present invention relates to a filter that is used as an air conditioner, an air purifier for home use or a business use, or a filter material that removes annoying odors in a passenger compartment of a car, and particularly, a filter that efficiently purifies tobacco odor.

  Deodorizing filters are used in various applications, and their deodorizing methods can be broadly categorized to absorb odorous substances using adsorption types that use adsorbents such as activated carbon and zeolite, and ozone, photocatalysts, metal phthalocyanine complexes, etc. It is classified into a catalyst type to be decomposed and removed, or a combined type in which this adsorption type and catalyst type are used in combination. Among these, for example, techniques using the excellent adsorption action of activated carbon are well known, but these adsorb malodorous components and are excellent in reducing the odor concentration in the short term, but malodorous components This is not a decrease in the amount of odor, but is said to be a deodorizing method with a limited effective period. Recently, a catalyst type or a combination type that decomposes and removes malodorous substances is increasing.

  In Patent Document 1, in a corrugated filter having a planar sheet (liner) and a corrugated sheet (core) as constituent members, one member is composed of a photocatalyst-containing sheet, and the other member is a special activated carbon fiber sheet. The photocatalyst composite corrugated filter comprised by this is disclosed. In addition, as the special activated carbon fiber sheet, at least one special activated carbon fiber sheet is combined with the photocatalyst-containing sheet among the activated carbon fiber sheet for removing lower aldehydes, the activated carbon fiber sheet for removing alkaline gas, and the activated carbon fiber sheet for removing acidic gas. , A method for efficiently decomposing and removing gases such as acetaldehyde, ammonia, hydrogen sulfide, and acetic acid.

  In Patent Document 2, at least one deodorant organic compound and deodorant inorganic compound selected from a polyamine compound and a hydrazide compound are fixed to a filter material composed of a nonwoven fabric of synthetic fibers via a synthetic resin binder. A deodorizing filter material is disclosed. It is described as having excellent deodorizing properties against bad odors such as ammonia, hydrogen sulfide, bad odor components such as aldehydes and acetic acid contained in tobacco odor.

  The applicant has applied for Patent Document 3 and includes a first deodorizing filter having a high pH environment and a second deodorizing filter having a low pH environment, and the first deodorizing filter and / or the second deodorizing filter. 2. The deodorizing filter is made of activated carbon mixed paper carrying a metal phthalocyanine complex, and has excellent deodorizing performance against many kinds of bad odors such as ammonia, hydrogen sulfide, methyl mercaptan, acetic acid, acetaldehyde, dimethyl sulfide. It is disclosed as having.

JP 2003-62413 A JP 2000-312809 WO2005 / 037334

  Each of these conventional techniques is a combination of an adsorbent and a catalyst, and the malodor adsorbed by the adsorbent is decomposed and deodorized by the catalyst, and is a useful method as an efficient deodorizing method. For cigarette odor, which is a typical bad odor, a filter having a stronger deodorizing effect, immediate effect, and durability has been demanded.

  The present invention provides the following means in order to provide a filter having a greater deodorizing effect, immediate effect, and durability, particularly with respect to tobacco odor among bad odors.

[1] A deodorizing filter obtained by processing a mixed paper containing an inorganic amine compound, a water-insoluble hydrazine compound, and activated carbon into a honeycomb shape.

[2] The deodorizing filter as described in [1] above, wherein the inorganic amine compound is obtained by supporting an amine compound on an inorganic porous material.

[3] The consumption according to item 1 or 2, wherein the water-insoluble hydrazine compound is one or more water-insoluble hydrazine compounds selected from hydrazine derivatives having a solubility in water at 25 ° C. of 5 g / l or less. Odor filter.

[4] The inorganic paper contains 5 to 25% by mass of the mixed paper, 5 to 25% by mass of the water-insoluble hydrazine compound, and 45 to 75% by mass of the activated carbon. 4. The deodorizing filter according to any one of items 1 to 3 above.

[5] An inorganic amine compound, a water-insoluble hydrazine compound, activated carbon, and natural pulp are added to water to prepare a water slurry, and the slurry is adjusted to a predetermined solid content concentration while stirring, and then a cationic polymer. Alternatively, an anionic polymer is added, and the resulting aggregate aqueous dispersion is formed into a sheet by a wet paper making method using a paper machine, and dried to obtain a mixed paper, and then the mixed paper is obtained using a corrugating machine. A method for producing a deodorizing filter having a honeycomb shape and a filter shape.

[6] 0.5 to 2.5 parts by weight of the inorganic amine compound, 0.5 to 2.5 parts by weight of the water-insoluble hydrazine compound, and 4.5 to 7.5 of the activated carbon with respect to 100 parts by weight of water. The manufacturing method of the deodorizing filter of the preceding clause 5 which added a weight part and said natural pulp 2.5-10 weight part, and created water slurry.

  In the invention of [1], since it is a mixed paper containing an inorganic amine compound, a water-insoluble hydrazine compound, and activated carbon, an adsorption and deodorizing effect excellent in malodor such as ammonia, acetaldehyde, and acetic acid can be exhibited. In particular, acetaldehyde, which is a typical tobacco odor gas, is difficult to adsorb on activated carbon, but inorganic amine compounds and water-insoluble hydrazine compounds have chemical adsorption properties, so they do not re-release acetaldehyde odor and are durable. Highly deodorant performance can be demonstrated. Inorganic amine compounds are effective for ammonia, aldehydes, pyridine (nicotine) and the like and have excellent durability. Water-insoluble hydrazine compounds are particularly effective for aldehydes and exhibit performance with excellent immediate effect. Activated carbon is not effective for aldehydes, but is effective for many other gases, and exhibits excellent adsorption performance for, for example, acetic acid, hydrogen sulfide, toluene, and the like. Moreover, in this invention, since this mixed paper is processed into the honeycomb shape, it can be set as the deodorizing filter with little pressure loss.

  In the invention of [2], since the inorganic amine compound is an amine compound supported on an inorganic porous material, aldehydes adsorbed on the inorganic porous material without being affected by a water-insoluble hydrazine compound or activated carbon. The ability to deodorize and excellent durability can be demonstrated.

  In the invention of [3], the water-insoluble hydrazine compound is one or more water-insoluble hydrazine compounds selected from hydrazine derivatives having a solubility in water at 25 ° C. of 5 g / l or less. The hydrazine compound can be dispersed without dissolving in water, and the hydrazine compound can be uniformly dispersed and supported on natural pulp when it becomes a mixed paper, and particularly has a great deodorizing effect on acetaldehyde, A deodorizing filter excellent in immediate effect can be obtained.

  In the invention of [4], the inorganic amine compound is 5 to 25% by mass, the water-insoluble hydrazine compound is 5 to 25% by mass, and the activated carbon is 45 to 75% by mass with respect to the mixed paper. Because it can be contained in large quantities, it can exhibit particularly excellent adsorption and deodorization effects on tobacco odors such as ammonia, acetaldehyde, and acetic acid, and it also has quick-acting performance and durability that can deodorize in a short time. It can be an odor filter.

  In the invention of [5], an inorganic amine compound, a water-insoluble hydrazine compound, activated carbon, and natural pulp are added to water to prepare a water slurry, and the slurry is adjusted to a predetermined solid content concentration while stirring. Thereafter, a cationic polymer or an anionic polymer is added, and the resulting aggregate aqueous dispersion is formed into a sheet by a wet papermaking method using a paper machine, so it is more homogeneous than the method of fixing the various chemicals after filtering. A sheet can be obtained and the drying process can be performed once, and an efficient method for producing a deodorizing filter can be obtained.

  In the invention of [6], 0.5 to 2.5 parts by weight of the inorganic amine compound, 0.5 to 2.5 parts by weight of the water-insoluble hydrazine compound, and 4.5% of the activated carbon with respect to 100 parts by weight of water. Since 7.5 parts by weight and 2.5 to 10 parts by weight of the natural pulp are added, a water slurry is prepared and formed into a sheet by the wet papermaking method, each deodorizing agent can be included in a large amount. Therefore, it is possible to provide a method for producing a deodorizing filter that is excellent in deodorizing performance and also has excellent immediate effect and durability.

  The deodorizing filter of the present invention is installed, for example, before and after a fan or the like, and performs deodorization by allowing malodorous gas to pass through the deodorizing filter, and includes an inorganic amine compound, a water-insoluble hydrazine compound, A deodorizing filter containing activated carbon.

  The amine compound contained in the deodorizing filter of the present invention can be any of aliphatic amine, aromatic amine, and alicyclic amine as long as the compound has one or more primary amino groups in the molecule. Those having a boiling point of 100 ° C. or higher are preferred. A temperature of 100 ° C. or lower is not preferable because it may evaporate in the step of supporting the inorganic porous material. For example, since diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and the like are liquids, they can be used as they are in a process of supporting them on an inorganic porous material. In the case of other amine compounds, an inorganic amine compound can be obtained by dissolving it in water or the like, immersing the inorganic porous material, and drying by heating. Since the inorganic amine compound does not directly contact the water-insoluble hydrazine compound or activated carbon, the inorganic amine compound can exert its ability to deodorize aldehydes without being affected by these. Moreover, it is more efficient and the durability of the deodorizing effect is superior when the amine compound and the malodorous component react directly with each other and react with the amine compound once adsorbed on the inorganic porous material.

  Examples of the inorganic porous material include zeolite, barley stone, silica gel and the like. Among them, porous silica (silicon dioxide), even when hydrophobic zeolite is dispersed in water, is preferable because it retains the amine compound inside. . The particle size of the inorganic porous material is preferably 0.5 to 50 μm. If it is 0.5 μm or less, the amine compound is hardly supported in the pores of the inorganic porous material, and the cost is not preferred. On the other hand, the thickness of 50 μm or more is not preferable because it easily falls off the mixed paper.

  The water-insoluble hydrazine compound has a solubility in water of 5 g / l or less at 25 ° C., and is produced by a reaction between a hydrazine compound and a long-chain aliphatic compound or aromatic compound. Specific examples include sebacic acid dihydrazide, dotecandioic acid dihydrazide, and isophthalic acid dihydrazide. The water-insoluble hydrazine compound is a fine powder, and its particle size is preferably 0.5 to 50 μm. When the thickness is 0.5 μm or less, the slurry liquid tends to foam when a water slurry is prepared and formed into a sheet by a wet papermaking method, which is not preferable. On the other hand, if it is 50 μm or more, it tends to fall off from the mixed paper, which is not preferable. Further, the water-insoluble hydrazine compound is a deodorant that is effective for chemical adsorption of aldehyde components such as acetaldehyde, which is considered to be contained abundantly in the tobacco odor, and has excellent immediate effect.

  As the activated carbon, activated carbon-based porous bodies such as coconut shell activated carbon, petroleum pitch-based spherical activated carbon, activated carbon fiber, and wood-based activated carbon are preferably used because of their extremely high adsorption specific surface area. Among them, it is particularly preferable to use coconut shell activated carbon.

  It is preferable that 5 to 25% by mass of the inorganic amine compound, 5 to 25% by mass of the water-insoluble hydrazine compound, and 45 to 75% by mass of the activated carbon are contained in a large amount with respect to the mixed paper. When the inorganic amine compound is less than 5% by mass, the deodorizing performance with respect to a basic gas such as ammonia is lowered, which is not preferable. If it exceeds 25% by mass, the deodorizing performance against acetic acid and other acidic gases is deteriorated. More preferably, it is 10-20 mass%.

  On the other hand, if the water-insoluble hydrazine compound is less than 5% by mass relative to the mixed paper, the immediate effect on aldehydes is unfavorable. When it exceeds 25 mass%, the deodorizing performance with respect to basic gas, such as ammonia, falls and it is unpreferable. More preferably, it is 10-20 mass%.

  Further, when the activated carbon is less than 45% by mass with respect to the mixed paper, the adsorption speed of malodorous gas is decreased, which is not preferable. If it exceeds 75, the proportion of cellulosic fibers will inevitably decrease, resulting in a decrease in the physical strength of the filter, which is not preferable. More preferably, it is 50-70 mass%.

  The mixed paper can be produced by a normal wet paper making method. 8-22.5 parts by weight of an inorganic amine compound, a water-insoluble hydrazine compound, activated carbon, and natural pulp are added to 100 parts by weight of water to prepare a water slurry. The slurry is adjusted to a predetermined solid content concentration while stirring, and then a cationic polymer or an anionic polymer (for example, an aminoalkyl acrylate quaternary salt copolymer or an acrylamide-acrylic acid copolymer) is reduced to 0. 1 to 0.5 parts by weight is added, and the resulting aggregate aqueous dispersion is formed into a sheet by a wet papermaking method using a paper machine and dried to obtain a mixed paper. Next, this mixed paper may be processed into a honeycomb shape by using a corrugating machine to obtain a filter shape.

  The inorganic amine compound mixed in the mixed paper is preferably added in an amount of 0.5 to 2.5 parts by weight with respect to 100 parts by weight of water. If the amount is less than 0.5 parts by weight, the deodorizing performance against a basic gas such as ammonia is lowered, which is not preferable. If it exceeds 2.5 parts by weight, the deodorizing performance against acetic acid and other acidic gases is lowered, which is not preferable. More preferably, 1.0 to 2.0 parts by weight is added.

  The water-insoluble hydrazine compound mixed in the mixed paper is preferably added in an amount of 0.5 to 2.5 parts by weight with respect to 100 parts by weight of water. If it is less than 0.5 parts by weight, the immediate effect on aldehydes is undesirably lowered. If it exceeds 2.5 parts by weight, the deodorizing performance against basic gas such as ammonia is lowered, which is not preferable. More preferably, 1.0 to 2.0 parts by weight is added.

  Moreover, it is preferable to add 4.5-7.5 weight part of activated carbon mixed in the said mixed paper with respect to 100 weight part of water. If it is less than 4.5 parts by weight, the adsorption speed of malodorous gas is lowered, which is not preferable. If it exceeds 7.5 parts by weight, the physical strength of the filter is lowered, which is not preferable. More preferably, 5.0 to 7.0 parts by weight is added.

  Moreover, in the deodorizing filter of this invention, you may employ | adopt the structure which carry | supported other deodorizing agents, an odor adsorption agent, various additives, etc. in the range which does not prevent invention.

Next, the present invention will be described specifically by way of examples. In addition, the measurement of various deodorization performance in an Example cuts the filter of this invention into the magnitude | size of 400x300x12 (mm), replaces it with the filter of the commercially available air cleaner, and this air cleaner is 1 m. ³ was placed in an acrylic box and various deodorizing performances were measured. First, after burning five cigarettes in an acrylic box, the initial concentrations of ammonia, acetaldehyde and acetic acid after 10 minutes are measured with a detector tube, and the air cleaner is operated.
(Immediate performance test)
After operating the air cleaner, measure the concentration of each gas with a detector tube 1 minute later to determine the removal rate (%). “◎” if the removal rate is 90% or more, “◯” if the removal rate is 85% or more and less than 90%, “△” if the removal rate is 80% or more and less than 85%, and removal rate. In which less than 80% was evaluated as “x”, and “◯” or more was evaluated as acceptable.

(Durability test)
Measure the concentration of each gas 30 minutes after operating the air purifier with a detector tube to obtain the removal rate (%), and repeat this 50 times and the removal rate is 90% or more. , “◯” when the removal rate is 85% or more and less than 90%, “△” when the removal rate is 80% or more and less than 85%, and “X” when the removal rate is less than 80%, “○” or higher was evaluated as acceptable.

<Example 1>
Add 1.5 parts by weight of an inorganic amine compound composed of zeolite carrying diethylenetriamine, 1.5 parts by weight of sebacic acid dihydrazide, 6.0 parts by weight of coconut shell activated carbon and 5.0 parts by weight of natural pulp to 100 parts by weight of water. Then, a water slurry is prepared, and then an aggregate aqueous dispersion obtained by adding 0.2 parts by weight of an aminoalkyl acrylate quaternary salt copolymer (cationic polymer) is formed into a sheet by a wet paper making method using a paper machine. And dried to obtain a mixed paper (weight per unit area: 100 g / m ² ). A part of the obtained mixed paper was processed into corrugated paper using a corrugating machine. The corrugated paper and the flat paper were adhered and laminated with an adhesive made of an ethylene-vinyl acetate copolymer to obtain a filter material processed into a honeycomb shape with a cell density of 230 cells / inch ² . Next, it cut | judged to the predetermined | prescribed magnitude | size, mounted in the air cleaner, said immediate effect performance test and durability performance test were done, and the removal rate was described in Table 1.

<Examples 2 to 9>
Next, each structure was changed as shown in Table 1 to obtain a deodorizing filter. Each performance test was performed and the removal rate is shown in Table 1. All showed good immediate performance and durability.

<Comparative Example 1>
A deodorizing filter was obtained in the same manner as in Example 1 except that 0.3 part by weight of the inorganic amine compound was used in Example 1, and the removal rate is shown in Table 2.

<Comparative Examples 2-8>
As shown in Table 2, each configuration was changed to obtain a deodorizing filter. Each performance test was conducted and the removal rate is shown in Table 2. However, good immediate performance and durability were not obtained. Comparative Examples 6 and 7 were good quick-acting performance and durable performance, but failed as strength as a filter could not be obtained.

  The technology of the present invention is widely used as a filter material for household or commercial air conditioners, air purifiers, or the like, or a filter material that removes annoying odors from the interior air of cars, especially a filter material that efficiently removes tobacco odors. The

Claims (6)

A deodorizing filter obtained by processing a mixed paper containing an inorganic amine compound, a water-insoluble hydrazine compound, and activated carbon into a honeycomb shape. The deodorizing filter according to claim 1, wherein the inorganic amine compound is an amine compound supported on an inorganic porous material. The deodorizing filter according to claim 1 or 2, wherein the water-insoluble hydrazine compound is one or more water-insoluble hydrazine compounds selected from hydrazine derivatives having a solubility in water at 25 ° C of 5 g / l or less. . The said mixed paper contains 5-25 mass% of the inorganic amine compound, 5-25 mass% of the water-insoluble hydrazine compound, and 45-75 mass% of the activated carbon. The deodorizing filter according to any one of 1 to 3. An inorganic amine compound, a water-insoluble hydrazine compound, activated carbon, and natural pulp are added to water to create a water slurry, and the slurry is adjusted to a predetermined solid content concentration while stirring, and then a cationic polymer or anionic system A polymer is added, and the resulting aggregate aqueous dispersion is formed into a sheet by a wet papermaking method using a paper machine, dried to obtain a mixed paper, and then the mixed paper is formed into a honeycomb shape using a corrugating machine. The manufacturing method of the deodorizing filter made into the shape of a filter. To 100 parts by weight of water, 0.5 to 2.5 parts by weight of the inorganic amine compound, 0.5 to 2.5 parts by weight of the water-insoluble hydrazine compound, and 4.5 to 7.5 parts by weight of the activated carbon The manufacturing method of the deodorizing filter of Claim 5 which added 2.5-10 weight part of said natural pulp, and created the water slurry.