JP2000210373A - Deodorant and deodorant filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently eliminate uncomfortable smells inclusive of many kinds of odorous components with low equipment at a low cost and to improve the comfortableness in the living environment by depositing palladium and chlorine at a specific value or above in molar ratio on a porous carrier and specifying the deposition rate of the palladium to the porous carrier to a prescribed ratio. SOLUTION: This deodorant is formed by depositing the palladium and the chlorine on the porous carrier in such a manner that the molar ratio expressed by the chlorine/palladium attains >=2.5, provided that the deposition rate of the palladium to the porous carrier is a ratio of 0.1 to 10 wt.%. The field, where the palladium and chlorine deposited after the absorption of the odorous components to the porous substance coexist, is acted as a catalyst and at this time, the molar ratio is specified to >=2.5, by which the effect hereof is greatly exhibited. If the deposition rate of the palladium to the porous carrier is below 0.1 wt.%, the effect by the palladium is limited and sufficient deodorization effect is hardly obtainable. If the rate is above 10 wt.%, the adsorption performance of the porous carrier is impaired and the degradation in the deodorization performance is resulted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorant for removing odor and a deodorizing filter using the deodorant.
In particular, it relates to a deodorant and a deodorizing filter capable of removing the odor of tobacco with high efficiency.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand for removing unpleasant odors generated in a living space for the purpose of improving comfort in a living environment such as a room or a car. The demand for is increasing.

[0003] As the components constituting the tobacco smell, very many types such as nicotine, aldehydes, ammonia, acetic acid, hydrogen sulfide, and unsaturated hydrocarbons are known, and all of these components are efficiently removed. It is very difficult.

For example, a method of removing an odor component by physical adsorption using an adsorbent such as activated carbon is effective for removing a compound having a relatively low boiling point among the odor components. However, since only the van der Waals force of the odor component is used, there is a problem that the odor component having a high boiling point has a weak adsorption power and is difficult to remove.

[0005] As a method of solving such a problem,
There is known a method in which a drug is attached to an adsorbent to enhance the performance of removing a specific odor component. For example, it is known that an adsorbent impregnated with an alkali compound is effective for acidic components such as hydrogen sulfide and acetic acid. In the case of such an adsorbent, the acidic component is chemically adsorbed to the adsorbent. Thereby, its removal performance is enhanced.

On the contrary, an adsorbent to which an acidic compound is impregnated is effective for a basic component such as ammonia.
Further, for aldehydes, various methods have been proposed in which an agent chemically reacting with the aldehyde is attached to the adsorbent. For example, Japanese Patent Publication No. 60-54095 and Japanese Patent Application Laid-Open No.
Japanese Patent No. 3588 proposes an activated carbon in which aniline or aniline phosphate is impregnated.

[0007]

However, with the above-mentioned conventional deodorant, deodorization capable of efficiently removing specific components such as acidic components, basic components and aldehydes among tobacco components is possible. However, this does not mean that the entire tobacco odor including other odor components can be efficiently deodorized. There is also a method of using an acidic component, a basic component, and an aldehyde in combination with a deodorant having a high deodorizing effect, but there is a problem that the use of a plurality of deodorants is complicated and costly. As for the odors of the neutral components other than the odor, there is also a problem that the removal performance is not sufficient because the removal is based only on the physical adsorption ability of the adsorbent.

The present invention has been made in order to solve such problems, and an object of the present invention is to remove unpleasant odors including various odor components such as tobacco odor, and to remove the unpleasant odor components. The point that the deodorant and the deodorizing filter according to a single configuration can be efficiently removed at low equipment and operating cost, thereby further improving the comfort in the living environment. It is in.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, palladium and chlorine have been added to a porous carrier for adsorbing odor components under predetermined conditions. This is particularly effective for effectively removing tobacco odor by constituting a deodorant by supporting the compound on a substrate.Furthermore, by coexisting a compound containing copper, the deodorizing performance can be further improved. Thus, the present invention has been completed.

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 in the present invention is characterized in that palladium and chlorine are supported on a porous carrier so that the molar ratio represented by chlorine / palladium is 2.5 or more, and the porous carrier of palladium is used. A deodorant characterized in that the amount of the carrier is 0.1 to 10% by weight.

A second aspect of the present invention is directed to the deodorizer according to the first aspect of the present invention, further comprising copper or a copper compound supported thereon.

A third aspect of the present invention is the deodorant according to the first or second aspect, wherein the porous carrier is activated carbon.

According to a fourth aspect of the present invention, there is provided a deodorant comprising the deodorant according to any one of the first to third aspects attached to a porous substrate. Filter.

According to a fifth aspect of the present invention, there is provided a deodorizing filter characterized in that the deodorizing agent according to any one of the first to third aspects is formed into a monolith. is there.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below. Regarding the present invention, the porous carrier is not particularly limited, but those having high odor component adsorption ability can be particularly preferably used.For example, activated carbon, activated carbon fiber, zeolite, silica gel,
Inorganic adsorbents such as activated alumina, activated clay and sepiolite, and organic adsorbents such as ion exchange resin and styrene resin adsorbent can be used.

Among these adsorbents, activated carbon has a high specific adsorption of about 1000 m ² / g, which is higher than other adsorbents, so that it has high adsorptivity, from micropores having a pore diameter of 2 nm or less to macropores having a pore diameter of 50 nm or more. Due to its wide distribution, it is most suitable for adsorbing various odor components of tobacco odor.

As the shape of the porous body, various shapes such as granules, spheres, pellets, and powders are selected according to the use environment and use conditions. When a powdery porous body is used, a monolithic deodorizing filter of a honeycomb or a sheet can be obtained by adding an organic or inorganic binder.

The deodorizing filter can be conveniently and conveniently arranged in an air purifier installed in a room or a car or in a vent.
There are many advantages in use, such as easy replacement and maintenance.

Further, the deodorant according to the present invention can be applied to a porous substrate formed into an arbitrary shape according to the purpose. As the porous substrate, a porous synthetic resin,
A polyurethane foam, a nonwoven fabric, a honeycomb structure (of ceramics, metal, paper, resin, or the like), a loop-shaped laminate, or the like is used.

As a method for supporting palladium and chlorine supported on the porous carrier, after the porous carrier is formed into a desired shape (or in the same shape),
A method of immersing in a solution containing chlorine, palladium, a method of spraying a solution containing chlorine, a method of forming a desired shape after mixing a porous carrier and palladium, a compound containing chlorine, etc. A method is possible.

It is not always necessary to carry out palladium and chlorine on the porous carrier at the same time. It is also possible to carry chlorine on the porous carrier and subsequently carry palladium. After supporting palladium on the porous carrier, it is also possible to support chlorine subsequently.

At this time, the amount of palladium supported on the porous carrier must be 0.1 to 10% by weight. In this case, when the loading amount is 0.1% by weight or less, the effect of loading palladium is limited, and it is difficult to obtain sufficient deodorizing performance. On the other hand, when the loading amount is 10% by weight or more, the adsorption performance of the porous carrier is impaired, and as a result, the deodorization performance is reduced.

In the deodorant in which palladium and chlorine are supported on the porous carrier as described above, higher deodorization performance is realized by further supporting copper or a copper compound in the coexistence. In this case, the supported amount of copper or a copper compound is preferably 0.1 to 10% by weight. When the loading amount is 0.1% by weight or less, there is no significant difference from the case where copper or a copper compound is not loaded, and when the loading amount is 10% by weight or more, the adsorption performance of the porous carrier is impaired. Will bring.

As the copper compound, an inorganic copper compound such as copper chloride, copper sulfate and copper nitrate, and an organic copper compound such as copper acetate can be used. However, a water-soluble copper compound is preferable in view of ease of carrying.

As a method for supporting copper or a copper compound, a method in which a porous carrier is formed into a desired shape (or as it is) and then immersed in a solution in which copper or a copper compound is dissolved, Spraying, after mixing the porous carrier and copper or copper compound, a method of molding into a desired shape, can be carried by each method, palladium, chlorine may be carried at the same time, or separately However, in order to obtain the effect of supporting copper or a copper compound, palladium and chlorine must coexist on the porous carrier.

Although the mode of the odor deodorizing mechanism by the deodorizing agent according to the present invention is not necessarily clarified, after the odor component is adsorbed on the porous body,
It is considered that the field where the supported palladium and chlorine coexist acts as a catalyst and chemically converts the adsorbed odor component into an odorless compound or a compound having a lower odor intensity. At this time, the effect is remarkably exhibited by setting the molar ratio of chlorine to palladium to be not less than 2.5 in chlorine / palladium. Then, it is considered that highly efficient odor deodorization is achieved by this catalytic action. In addition, copper or a copper compound is considered to have a function of further promoting the catalytic action formed by the coexistence system of palladium and chlorine.

[0027]

Embodiments of the present invention will be specifically described below.

Powdered activated carbon as a raw material for coconut shell was used as a porous material for adsorption of odor components, and a binder component and water were added to the activated carbon powder and kneaded well. By extruding this, a honeycomb monolith is formed,
By cutting, a deodorizing filter having a filter volume of 1054 mm ³ was produced.

The supporting of the catalyst is performed by drying the honeycomb-shaped deodorizing filter at 120 ° C., spraying an aqueous solution containing chlorine and palladium on the honeycomb-shaped deodorizing filter, and impregnating the entire amount of the aqueous solution into the filter to remove chlorine in the aqueous solution. The whole amount of palladium was supported on the porous carrier.

Further, when copper is supported in addition to chlorine and palladium, an aqueous solution containing chlorine, palladium and copper was sprayed on a dried honeycomb deodorizing filter and impregnated with the aqueous solution.

The mixing ratio of activated carbon, palladium and copper and the molar ratio of supported chlorine and palladium of the prepared deodorizing filter are shown in Table 1 below.

[0032]

[Table 1]

Using the seven types of deodorizing filters shown in Table 1, a test was conducted to compare the deodorizing performance of tobacco odor. The test used the odor of burning actual tobacco and compared the deodorizing performance. After burning five cigarettes in an acrylic case having a volume of 1 m ³ , a blower incorporating a deodorizing filter was placed in an acrylic case at a volume of 0.1 m ³ .
The device was operated at a linear flow rate of 5 m / s for a predetermined time to deodorize the inside of the case.

At this time, one hour, two hours, and four hours after the start of the deodorization, the odor gas in the acrylic case was collected in a sampling bag, and the odor index of the collected gas was measured. The measuring method of the odor index at this time is 3
It was carried out based on the sensory test by the point comparison type odor bag method. Table 2 shows the results of the deodorization test.

[0035]

[Table 2]

In comparison with the case where the catalyst is not supported (Comparative Example 1) formed with activated carbon and a binder, chlorine and palladium are supported when chlorine and palladium are supported at a molar ratio (chlorine / palladium) 2 (Comparative Example 2). The effect of carrying is not recognized.

However, even if the amount of supported palladium is the same, the effect of supporting palladium and chlorine is recognized by increasing the amount of supported chlorine and increasing the molar ratio of chlorine to palladium to 2.5, and high deodorization is achieved. Performance was obtained (Example 1).

Further, the molar ratio of chlorine to palladium (chlorine /
It was confirmed that the deodorizing effect was enhanced by increasing palladium) to 3 (Example 2) and 5 (Example 3), but in a test in which the molar ratio was increased to 10 (Example 4), the molar ratio was 5 or more. No improvement in deodorizing performance was observed.

The effect of supporting palladium and chlorine as a catalyst is different from that of a filter using only activated carbon that does not support a catalyst, in which the odor that can be removed is saturated to a certain amount even if the deodorizing time is lengthened. In the case of the deodorizing filter supporting chlorine and palladium, the longer the test, the more remarkable the effect was recognized.

From the above test results, it was clarified that by supporting chlorine and palladium at a molar ratio (chlorine / palladium) of 2.5 or more, the catalytic effect was sufficiently recognized and the deodorizing performance was improved. . Further, it was found that the deodorizing performance was further enhanced by increasing the molar ratio of chlorine to palladium, but the effect of loading was saturated at a molar ratio of 5 or more.

Further, in the deodorizing filter which carries copper in addition to palladium and chlorine, the deodorizing performance is improved as compared with the case where only chlorine and palladium are carried, and copper enhances the catalytic action of palladium and chlorine. (Example 5).

In the case of Comparative Example 3 in which only the blower was operated without incorporating a deodorizing filter as a blank, no change was observed in the odor index over time, and no spontaneous attenuation of odor other than deodorization by the deodorizing filter was observed. Was.

[0043]

The present invention is embodied in the form described above and has the following effects.

That is, when the deodorant according to the present invention is used, the odor component, particularly, the odor component of tobacco can be removed more effectively than when the adsorbent is used alone. Also, compared to the case where specific components are removed by adding a chemical such as an alkali or an acid, the removal efficiency of the entire odor component can be increased, so that it is possible to provide a very high performance deodorant or odor filter. It becomes possible.

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Claims (5)

[Claims] 1. A method according to claim 1, wherein palladium and chlorine are supported on the porous carrier in a molar ratio represented by chlorine / palladium of 2.5 or more, and the amount of palladium supported on the porous carrier is 0.1. A deodorant characterized by having a ratio of 10 to 10% by weight. 2. The deodorant according to claim 1, further comprising copper or a copper compound. 3. The porous carrier is activated carbon.
Or the deodorant according to 2. 4. A deodorizing filter comprising the deodorant according to claim 1 attached to a porous substrate. 5. A deodorizing filter obtained by molding the deodorizing agent according to claim 1 into a monolith.