JPH05269184A - Deodorant - Google Patents

Abstract

PURPOSE:To enable the formation of a porous structure having a large cellular structure made by expanding interlayer spacings and to enable the adsorption of a large amt. of odorous materials by intercalating an org. acid metal salt between the layers of layer clay works. CONSTITUTION:The layer clay compd. which is the material having the layer structure stacked with many layers and is strongly bonded by the covalent bond or ionic bond within the layer plane can easily be inserted with materials, such as org. acids, silica sol and titania sol, between these layers (intercalation). The org. acid metal salt is, thereupon, intercalated between the layers of such layer clay compd. The odorous materials having poor chemical reactivity are brought into chemical reaction by the catalytic effect of the org. acid metal salt, by which these materials are deodorized. Smectite group clay ore, etc., such as montmorillonite and saponite, are used and stearic acid, ascorbic acid, etc., are used as the org. metal salt.

Description

Detailed Description of the Invention

[0001]

This invention relates to a deodorant.

[0002]

2. Description of the Related Art Generally, smoke and waste liquor from factories, cigarettes and raw sewage, and kitchen garbage are sources of bad odors and offensive odors. At home, odors from toilets, kitchens, pets, cigarettes, etc. cause discomfort, frustration, headaches, and the like. In particular, when the air conditioner is operated, it is often kept in a closed room, so countermeasures against these offensive odors and offensive odors are a big problem.

Examples of such substances that cause offensive odors and unpleasant odors in daily life include amines such as trimethylamine, which is a rotting odor of fish and meat, ammonia in toilet odor,
Hydrogen sulfide, which is the rotten odor of eggs and milk, rotten odor of vegetables and garbage, manure odor, and mercaptans such as methyl mercaptan, which is the pickled odor, and disulfides can be mentioned. Conventionally,
As the deodorant, for example, there is a deodorant solid composed of a gas adsorbing substance capable of deodorizing by physically adsorbing an odor substance such as a porous body of activated carbon or ceramics.

Other deodorants include deodorant solids formed by forming a metal complex on the surface of an inorganic oxide porous body such as zeolite (hereinafter referred to as "inorganic oxide-metal complex type porous body"). Sometimes called). This deodorant solid has a physical deodorizing effect of physically adsorbing and deodorizing odorous substances, and by the action of the surface complex, the odorous substances are chemically reacted such as oxidation, reduction, neutralization, etc. It also has a chemical deodorizing effect of deodorizing by removing it.

The present inventors have recently developed another type of deodorant solid having both a physical deodorizing effect and a chemical deodorizing effect. This deodorant solid is composed of Fe, Mn,
It has a skeleton made of a three-dimensional mesh-like sintered body of one or more metals selected from the group consisting of Cr, Ni, Zn, Al, and Cu, and the surface of the skeleton is the metal described above. Reaction product (complex) of oxypolybasic acids
And a porous body covered with (hereinafter, this may be referred to as “metal-oxy polybasic acid-based porous body”).

[0006]

However, the deodorant solid composed of the above-mentioned inorganic oxide-metal complex type porous body or metal-oxy polybasic acid type porous body is composed of amines, ammonia,
It has an excellent deodorizing effect on odorants with high chemical reactivity such as hydrogen sulfide, but deodorizes sulfur-based odorants with poor chemical reactivity such as mercaptans and disulfides. There was a problem that the effect was not sufficient.

Further, there is a problem that it is often difficult to deodorize the sulfur-based odors such as mercaptans and disulfides with respect to the deodorant solid composed of the above-mentioned gas adsorbent. In view of such circumstances, it is an object of the present invention to provide a deodorant having an excellent deodorizing effect on all odors in daily life, including odorous substances having poor chemical reactivity.

[0008]

In order to solve the above problems, the inventor has made various studies. As a result, the present invention has been completed by confirming the following by experiments. If a material having a larger pore volume (specific volume) than the above-mentioned inorganic oxide-metal complex porous body or metal-oxypolybasic acid porous body is loaded with a catalytically active compound, the same volume can be obtained. We thought that it would be possible to exert a great deodorizing effect, and studied various such materials. As a result, we focused on the layered material. Here, the layered substance is a substance having a layered structure in which a large number of layers are stacked, and is strongly bonded by covalent bond or ionic bond in the layer plane,
The layers are stacked by van der Waals forces. Therefore, a different substance can be easily inserted between layers (insertion of such a different substance into such a layered substance is called "intercalation").
By inserting different kinds of substances, voids are formed between layers to have a porous structure, and a new material having various properties is obtained by combining the layered substance and the substance intercalating between the layers. For example, it is known that a layered clay compound such as a smectite group clay mineral can intercalate an organic acid, silica sol, titania sol or the like between the layers. The layer spacing after intercalation is enlarged by about 5 to 10 times as compared with that before intercalation, and large voids are formed between the layers. Therefore, when a catalytically active metal salt of an organic acid is intercalated between the layers of the layered clay compound, the layer spacing is expanded and a porous structure having a large pore volume is formed. It becomes possible to adsorb odorous substances, and by the catalytic action of the organic acid metal salt intercalated between layers, it becomes possible to deodorize by chemically reacting with odorous substances with poor chemical reactivity. become. As a result, it is possible to efficiently deodorize all odors.

Therefore, the deodorant according to the present invention is
An organic acid metal salt is intercalated (inserted) between layers of a layered clay compound. The layered clay compound used in the present invention is not particularly limited,
Examples thereof include smectite group clay minerals such as montmorillonite (also called montmorillonite) and saponite (also called saponite). The layered clay compound may be used alone or in combination of two or more.

The organic acid metal salt used in the present invention is not particularly limited, but for example, stearic acid,
Iron salts, manganese salts of organic acids such as ascorbic acid, gluconic acid, citric acid, tartaric acid, tannic acid, gallic acid, EDTA (ethylenediaminetetraacetic acid) and malic acid,
Examples thereof include chromium salts, nickel salts, zinc salts, aluminum salts, copper salts and cobalt salts. Specifically, for example, zinc stearate _{[Zn (C 18 H 35 O 2} ) 2 ], cobalt stearate _{[Co (C 18 H 35 O 2} ) 2 ], and the like. The organic acid metal salt may be used alone or in combination of two or more.

The method for producing the deodorant of the present invention is not particularly limited, but examples thereof include the method described below. The layered clay compound is mixed with a solvent such as water, and further kneaded as necessary to contain the solvent between the layers and swell. Water is generally used as a solvent, but other polar solvents such as alcohols such as methanol and ethanol, dimethylformamide (DM
F), dimethyl sulfoxide (DMSO), acetone or the like may be used. Only one kind of solvent may be used,
You may use 2 or more types together.

As described above, the layered clay compound was swollen, and the solution of the organic acid metal salt was added and mixed to the place where the layer interval was greatly expanded as compared with that before the swelling, and further kneading was performed if necessary. By doing so, the organic acid metal salt is intercalated (inserted) between the layers of the layered clay compound by the action of ion exchange. Then, the deodorant is obtained by drying. Examples of the drying method include natural drying, hot air drying, freeze drying, supercritical drying, and the like, and are not particularly limited. The organic acid metal salt remains between the layers even after drying,
As a result, the layer spacing of the layered clay compound is kept expanded compared to the initial stage. Therefore, a porous structure having a large pore volume is formed.

[0013]

[Function] When a catalytically active metal salt of an organic acid is intercalated between layers of a layered clay compound, the layer spacing is expanded,
Since a porous structure with a large pore volume is formed, it is possible to adsorb a large amount of odorous substances, and the organic acid metal salt intercalated between the layers catalyzes chemical reactivity. Since it becomes possible to deodorize a poor odor substance by a chemical reaction, the deodorizing power is greatly improved. As a result, it becomes possible to efficiently deodorize all odors in daily life, including odorous substances with poor chemical reactivity.

[0014]

EXAMPLES Examples and comparative examples of the present invention will be shown below, but the present invention is not limited to the following examples. -Example 1-Na-montmorillonite, which is a layered clay compound, and water 5
A 0% -ethanol 50% mixed solvent was included and swollen. An aqueous solution of zinc stearate was added to and mixed with the thus obtained Na-montmorillonite solution, and an intercalation reaction was performed.

Thereafter, washing with ethanol several times,
Deodorant is obtained by repeatedly centrifuging, orienting it in a plate shape with a spatula, and supercritically drying for 8 hours at a temperature of 40 ° C. and a pressure of 100 atm while adding carbon dioxide having a relatively low critical point. Got -Example 2-The deodorant was obtained in the same manner as in Example 1 except that cobalt stearate was used instead of zinc stearate.

-Comparative Example 1-Activated carbon was directly used as a deodorant. -Comparative Example 2- Zeolite was used as a deodorant as it was. Examples 1 to 1 above
2 and the deodorizing performance of each deodorant obtained in Comparative Examples 1 and 2 was evaluated by the following method using the apparatus shown in FIG.

As shown in the figure, first, the upper and lower two-stage mesh 2 containing 30 g of the deodorant 1 is installed in an acrylic resin chamber 3 having a volume of 40 liters, and methyl mercaptan is injected as a malodorous gas. did. In order to make the concentration of methyl mercaptan in the chamber 3 uniform, after blowing and stirring in the direction of arrow A for several minutes by the circulation fan 4, the initial concentration (C ₀ ) of methyl mercaptan was measured by the gas detection tube 5, It was 100 ppm.

Next, the blower fan 6 with the direction of arrow B as the blowing direction was actuated to accelerate the odor to the deodorant 1 and left for about 30 minutes. Then, the concentration (C ₁ ) of methyl mercaptan is measured by the gas detector tube 5, and the residual gas ratio of methyl mercaptan [= C ₁ / C
₀ × 100 (%)] was calculated. The results were as follows.

Example 1 ... 10% Example 2 ... 7% Comparative Example 1 ... 15% Comparative Example 2 ... 20% As can be seen from the above results, the deodorants of Examples 1 and 2 are the same as those of Comparative Examples 1 to 2. It was confirmed that the deodorant power against methyl mercaptan was superior to that of the deodorant of No. 2.

[0020]

EFFECTS OF THE INVENTION The deodorant according to the present invention has an excellent deodorizing effect on all odors in daily life, including odorous substances with poor chemical reactivity such as mercaptans.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an apparatus used for evaluating deodorizing performance of a deodorant in Examples and Comparative Examples.

[Explanation of symbols] 1 Deodorant

Claims (1)

[Claims] 1. A deodorant obtained by intercalating an organic acid metal salt between layers of a layered clay compound.