Deodorizer

Abstract

To provide a deodorizer that can be miniaturized and has low CO2 emissions. [Solution] The deodorizer 10 comprises a honeycomb structure having a plurality of cells 21 that constitute a flow path penetrating from one main surface 20A to the other main surface 20B, partitioned by partition walls 31, 32. The honeycomb structure is composed of a sintered body containing bamboo activated carbon and holds a metal oxidation catalyst. It can be particularly advantageously applied in places where installation space is limited, typically as a deodorizing functional component in toilet seat devices.

Description

Technical Field

[0001] The present invention relates to a deodorant.

Background Art

[0002] As a deodorant, there is known one having a honeycomb-shaped structure in which a large number of cells are formed and containing activated carbon and a metal oxide catalyst which are materials having a deodorizing effect. For example, in Patent Document 1, it is disclosed that the honeycomb-shaped structure has a specific number of cells per unit area and contains a metal oxide catalyst at a specific mass ratio. Further, it is disclosed that the honeycomb-shaped structure can be obtained by kneading activated carbon powder, clay mineral powder and methyl cellulose, and firing a preformed body obtained by extrusion molding.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Due to the relationship of the space where the deodorant is installed, a small-sized deodorant may be desired. Further, due to recent social demands, it is desired to provide a product with a small CO2 emission. Based on these, an object of the present invention is to provide a deodorant that can be miniaturized and has a small CO2 emission, and to provide such a deodorant.

Means for Solving the Problems

[0005] The deodorant of the present invention includes a honeycomb structure including a plurality of cells that form flow paths penetrating from one main surface to the other main surface partitioned by partition walls. The honeycomb structure is composed of a sintered body containing bamboo activated carbon and holds a metal oxide catalyst.

Effects of the Invention

[0006] We can provide a deodorizer that can be miniaturized and has low CO2 emissions, and we can also provide such a deodorizer. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view showing the configuration of a deodorizing body according to one embodiment of the present invention. [Figure 2] This is an enlarged view showing a portion of the main surface of the deodorizing body shown in Figure 1. [Modes for carrying out the invention]

[0008] [Description of Embodiments of the Present Invention] First, the embodiments of this invention will be listed and explained. The deodorizer according to this invention comprises a honeycomb structure having a plurality of cells that constitute a flow path penetrating from one main surface to the other, partitioned by a partition wall. The honeycomb structure is composed of a sintered body containing bamboo activated carbon and holds a metal oxidation catalyst.

[0009] The deodorizer of this invention is composed of a honeycomb structure which is a sintered body containing bamboo activated carbon. The honeycomb structure has numerous channels that penetrate from one main surface to the other, and as the gas containing odor components passes through these channels, the odor components are captured or decomposed by the deodorizer. The honeycomb structure increases the surface area of ​​the deodorizer, making it possible to obtain a deodorizer that has a deodorizing effect even in a small size. Further deodorizing effects can be obtained by including bamboo activated carbon and a metal oxidation catalyst in the partition walls.

[0010] Bamboo activated carbon is activated carbon made from bamboo, for example, harvested bamboo, and is obtained by consistently carbonizing and activating it in a manufacturing facility. Extensive bamboo forests exist in Japan, representing an untapped organic resource. When producing activated carbon from bamboo, the environmental burden (CO2 emissions) associated with transportation from the growing site to the manufacturing facility can be reduced. According to one estimate, using bamboo activated carbon made from bamboo grown in Japan can significantly reduce CO2 emissions compared to importing and using activated carbon made from coal or coconut shells from outside Japan.

[0011] In the above-described deodorizing body, the main surface of the honeycomb structure may be a rectangular surface with a long side of 50 mm to 70 mm and a short side of 20 mm to 65 mm, and the thickness of the partition walls separating the cells may be 0.08 mm to 0.16 mm. Within this range, it is possible to construct a large number of cells with thin partition walls while obtaining sufficient strength to handle as a honeycomb structure. This configuration makes it possible to obtain a small deodorizing body with deodorizing effect.

[0012] In the above-described deodorizing body, the bamboo activated carbon may be contained in an amount of 30% to 40% by mass relative to the total mass of the honeycomb structure. When the bamboo activated carbon content is within this range, it is possible to achieve both the deodorizing effect of the bamboo activated carbon and the strength of the honeycomb structure, making it more useful as a deodorizing body.

[0013] In the above-mentioned deodorizing body, the cell is located 1 cm from the main surface. 2 There can be approximately 60 to 110 of these particles. Within this range, it is possible to construct a deodorizing body that is small yet has a large airflow and deodorizing effect.

[0014] [Details of the embodiment of this invention] Next, an embodiment of the deodorizer of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts will be given the same reference numerals, and their descriptions will not be repeated.

[0015] <Deodorizer> Figure 1 is a perspective view showing the configuration of a deodorizing body according to one embodiment of this invention. Figure 1 shows the entire deodorizing body 10. However, the partition walls 31 and 32 are shown schematically in a simplified manner and do not reflect their actual dimensions. For the sake of explanation, the X-axis direction in Figure 1 is referred to as the width direction, the Y-axis direction as the depth direction, and the Z-axis direction as the height direction, but the actual installation of the deodorizing body is not limited to any particular direction. Referring to Figure 1, the deodorizing body 10 is a honeycomb structure that is shaped like a rectangular parallelepiped as a whole, and has many cells 21 which are through holes that penetrate from one main surface 20A to the other main surface 20B. In the deodorizing body 10 shown in Figure 1, the cells 21 are cells with a square opening, partitioned by partition walls 31 and 32 that extend in mutually orthogonal directions. Many partition walls 31 are formed at approximately equal intervals from each other. The same applies to the partition walls 32. Each of the partition walls 31 and 32 extends in the depth direction of the deodorizing body 10.

[0016] In the deodorizer 10 shown in Figure 1, the opening shape of the cell 21 is rectangular, but the shape of the cell is not limited. The cell may have an opening shape that is polygonal, such as triangular or hexagonal, or it may be circular, or it may be a corrugated shape formed by straight and wavy partitions, or it may be a honeycomb structure of any other known form.

[0017] The dimensions of the deodorizing body 10 are not necessarily limited, but the main surface of the honeycomb structure may be a rectangular surface with a long side (L1 shown in Figure 1) of 50 mm to 70 mm and a short side (L2 shown in Figure 1) of 20 mm to 65 mm. For example, the deodorizing body 10 may have a long side L1 of 55 mm and a short side L2 of 28 mm. The length in the depth direction (thickness) is also not necessarily limited, but may be around 10 mm to 30 mm. For example, the deodorizing body 10 has a thickness L3 of 15 mm.

[0018] FIG. 2 is an enlarged view showing a part of the main surface of the deodorizing body 10 shown in FIG. 1. The partition walls 31 and 32 may be integrally formed without a joint with each other. Such a molded product can be obtained, for example, by extrusion molding. The thickness of the partition wall is not necessarily limited, but may be 0.08 mm to 0.16 mm. As an example, the thickness of the partition walls 31 and 32 in the deodorizing body 10 is 0.1 mm. The deodorizing body 10 includes a large number of partition walls, and the thicknesses of all the partition walls may be substantially the same, or partition walls with different thicknesses may be mixed.

[0019] The size of the opening of the cell 21 is not necessarily limited either. However, when the cell is polygonal, the length of one side may be 0.4 mm to 1.5 mm. As an example, the opening of the cell 21 in the deodorizing body 10 is 0.9 mm × 0.9 mm. By adjusting the thickness and the interval of the partition walls of the deodorizing body, the number of cells per unit area can be adjusted. The number of cells per unit area is not necessarily limited, but it is advisable that there are 60 to 110 cells per 1 cm 2 of the main surface. In the deodorizing body 10 shown in FIG. 1, as an example, the thickness of the partition wall is 0.1 mm, one side of the cell is 0.9 mm, and the number of cells per 1 cm 2 is about 100.

[0020] When the thickness and the interval of the partition wall are within the above-mentioned ranges, it is preferable because it is possible to achieve both an increase in the surface area by increasing the number of cells and the strength of the honeycomb structure that is easy to handle. In the deodorizing body according to the present disclosure, since the air containing the malodorous component contacts the surface of the honeycomb structure and the malodorous component is captured or decomposed by the deodorizing body, the deodorizing performance is likely to be exhibited by increasing the surface area.

[0021] The honeycomb structure of the deodorizer according to this invention is composed of a sintered body containing bamboo activated carbon and holds a metal oxidation catalyst. In other words, the honeycomb structure contains bamboo activated carbon and a metal oxidation catalyst. Bamboo activated carbon is a porous material with fine pores and has the function of capturing malodorous components. Furthermore, bamboo activated carbon also functions as a structural material of the honeycomb structure. The content ratio of bamboo activated carbon in the honeycomb structure is not necessarily limited, but it may be 30% to 40% by mass relative to the total mass of the honeycomb structure. When it is within this range, a honeycomb structure can be obtained that exhibits the deodorizing effect of bamboo activated carbon and has a large number of cells.

[0022] The specific surface area of ​​bamboo activated carbon used as a raw material for deodorizers is not necessarily limited, but 1000m 2 It may be 1100m or more 2 It is preferable that the amount is 1 / g or more.

[0023] Bamboo activated carbon can be obtained from the market and used, but it is typically manufactured through a process of carbonizing bamboo to obtain bamboo char and then activating the bamboo char. Bamboo grows quickly and is an abundant raw material in Japan, and carbonization and activation can be carried out consistently near the production site. Therefore, compared to using conventionally used activated carbon (e.g., coconut shell activated carbon, coal-based activated carbon), CO2 emissions from raw material transportation, bamboo activated carbon manufacturing, shipping, and product completion can be significantly reduced.

[0024] The metal oxidation catalyst contained in the deodorizer is not particularly limited as long as it contains a metal element and is capable of deodorizing malodorous components. Examples of metal elements include Mn, Cu, Fe, Co, Zn, Ti, Ni, Al, Zr, Mg, Ca, Li, Sr, and K. The metal oxidation catalyst may contain one or more metal elements. Typical malodorous components include sulfur-containing compounds such as hydrogen sulfide (H2S) and methyl mercaptan (CH3SH). In order to effectively decompose not only odor components represented by sulfur-based components but also other components, it is preferable to use a metal oxidation catalyst containing Mn and at least one element selected from the group consisting of Cu, Fe, Co, Zn, P, Ti, Ni, Al, Zr, Mg, Ca, Li, Sr, and K. To achieve both versatility and deodorizing effect, a metal oxidation catalyst containing Mn and Cu is preferred, and a composite oxide of Mn and Cu is more preferred.

[0025] Examples of metal oxides used as metal oxidation catalysts include manganese oxide, copper oxide, zinc oxide, titanium oxide, iron oxide, cerium oxide, cobalt oxide, and nickel oxide. Among these, manganese oxide, copper oxide, or copper-manganese composite oxides are more preferred from the viewpoint of deodorizing performance.

[0026] These metal oxides can be added to or fixed to the honeycomb structure containing bamboo activated carbon after the honeycomb structure has been fired, by methods such as impregnation. The amount of metal oxide added is not necessarily limited, but for example, the mass of the metal oxide catalyst relative to the mass of bamboo activated carbon contained in the honeycomb structure may be 0.01 wt% or more, and is preferably 0.02 wt% or more, 0.05 wt% or more, or 0.1 wt% or more. There is no particular upper limit, but from the viewpoint of saturation of the deodorizing effect, it may be 0.5 wt% or less, and is preferably 0.4 wt% or less, or 0.3 wt% or less.

[0027] The honeycomb structure constituting the deodorizer may contain other components. These other components are not particularly limited, but may include clay minerals such as zeolite as binders, and may also contain silica sol, alumina sol, zirconia sol, ceria sol, methylcellulose, etc. Furthermore, for the purpose of adding deodorizing effects, cyclodextrin, surfactants, polyphenols, catechins, plant essential oils, etc., may be included. Antioxidants may include, for example, vitamin C, vitamin E, vitamin A, carotene, polyphenols, gallic acid, chlorogenic acid, catechin, rutin, tannic acid, ellagic acid, eugenol, geraniol, thymol, butylhydroxytoluene, butylhydroxyanisole, dibutylcresol, propyl gallate, butylhydroquinone, nordihydroguacaretic acid, rosemary extract, clove extract, rice bran extract, coffee extract, sage extract, coix seed extract, houttuynia cordata extract, etc.

[0028] <Method for manufacturing deodorizing bodies> The method for manufacturing the deodorizer relating to this disclosure is not limited, but it can be manufactured by, for example, the following method. First, bamboo activated carbon is prepared. Bamboo activated carbon can be obtained from the market or manufactured. Typically, bamboo activated carbon is obtained from bamboo through carbonization and activation processes. Powdered bamboo activated carbon is kneaded with a binder such as clay minerals, and a honeycomb-shaped molded body is obtained by extrusion molding. The molded body is fired to obtain a sintered honeycomb structure. Next, the honeycomb structure is supported with metal oxides by impregnating it with a liquid containing metal oxides. Alternatively, bamboo activated carbon, a binder, and metal oxides can be kneaded to obtain a molded body containing bamboo activated carbon and metal oxides, and this molded body can be fired.

[0029] The applications of the deodorizer according to this disclosure are not necessarily limited, but it is preferably used as a component of a deodorizer (e.g., a deodorizing cartridge) installed in devices such as toilets, bathrooms, kitchens, and closets, or incorporated into home appliances such as refrigerators. Because the deodorizer according to this disclosure has fine cells and is small in size, it is particularly preferably used as a deodorizer for toilet seat devices.

[0030] The embodiments disclosed herein should be understood to be illustrative in all respects and not restrictive in any way. The scope of this invention is defined not by the foregoing description but by the claims for utility model registration, and is intended to include all modifications within the scope and meaning of the claims and equivalents. [Industrial applicability]

[0031] The deodorizing body according to the present invention can be particularly advantageously applied in locations where installation space is limited, typically as a deodorizing functional component in a toilet seat device. [Explanation of Symbols]

[0032] 10: Deodorizer 21: Cell 31, 32: Bulkhead

Claims

1. It comprises a honeycomb structure having multiple cells that constitute a flow path penetrating from one main surface to the other, separated by partition walls. The aforementioned honeycomb structure is composed of a sintered body containing bamboo activated carbon and holds a metal oxidation catalyst. Deodorizer.

2. The main surface of the aforementioned honeycomb structure is a rectangular surface with a long side of 50 mm to 70 mm and a short side of 20 mm to 65 mm. The thickness of the partition walls separating the cells is 0.08 mm to 0.16 mm. The deodorizing body according to claim 1.

3. The bamboo activated carbon is contained in an amount of 30% to 40% by mass relative to the total mass of the honeycomb structure. The deodorizing body according to claim 1.

4. The cell is 1 cm from the main surface. ２ There are 60 to 110 of them. The deodorizing body according to claim 1.

5. A deodorizing body according to any one of claims 1 to 4, used as a member that is detachably fixed to a toilet seat device.

Images