JPH03251253A - Deodorant - Google Patents

Abstract

PURPOSE:To make improvement in the deodorizing effect of a wide range of malodorous gases by depositing one or >=2 kinds selected from a ferric compd., cupric compd. and potassium permanganate on an active carbon fiber material. CONSTITUTION:This deodorant is formed by depositing one or >=2 kinds selected from the ferric compd., cupric compd. and potassium permanganate on the active carbon fiber material. The deodorant is applicable to both of a=acidic components, such as sulfur-contg. compds., including hydrogen sulfide and mercaptan, and basic components, such as nitrogenous compds., including ammonia, amines, etc., as the odorous components which can be deodorized if the chemicals to be deposited on the active carbon fibers are the ferric compd. and cupric compd. The deodorant is effective for removing the acidic components in the case of the potassium permanganate. The deodorant is used in various forms according to the forms of the active carbon materials to be used; for example, the deodorant is mounted in the form of cloth or felt as a filter into the discharge port of an air conditioner or electric cleaner, etc., to deodorize exhaust gases.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deodorizing material using activated carbon fiber material.

[Conventional technology]

Traditionally, ammonia and trimethylamine are used industrially.

Scraping and combustion are used to remove foul-smelling gases such as methyl mercaptan and hydrogen sulfide, but these methods are complicated to operate, require large-scale equipment, and require high equipment costs. Therefore, the following methods are used to remove foul-smelling gases from indoor spaces such as homes and offices.

i) Masking with perfume ii) Adsorption with a net filter or activated carbon in the form of granules.

iii) Chemically react substances containing citric acid and maleic acid as main components.

iv) Spraying or gelling and dispersing the plant extract material.

■) React with a substance made from vitamin C and ferrous sulfate.

■) Spray oxidizing agents such as ozone and hydrogen peroxide primary hypochlorite.

However, these methods have the following drawbacks.

Since method 1) is a masking method, it only covers the odor with the scent of other fragrances, so there is essentially no change, and on the contrary, the odor tends to remain.

Method ii) has a limited adsorption capacity and a short lifetime. In particular, the adsorption capacity of net filters decreases over a short period of time.

Methods 1ii) and iv) are effective for ammonia and amines, but are unsuitable for mercaptans and hydrogen sulfide.

Method (2) is mainly used for deodorizing ammonia and is used in refrigerators, etc. Because it uses L-ascorbic acid, it is extremely sensitive to temperature changes.

Regarding the method vi), there is a problem of secondary pollution because the oxidizing agent is sprayed.

[Problem to be solved by the invention]

An object of the present invention is to provide a deodorizing material that has excellent deodorizing ability and can overcome the above problems by incorporating a specific drug into an activated carbon fiber material.

That is, the present invention is a deodorizing material characterized in that an activated carbon fiber material supports one or more of a ferric compound, a cupric compound, and a potassium permanganate.

Ferric compounds include ferric chloride and ferric sulfate.

Examples include ferric nitrate, and examples of cupric compounds include cupric chloride, cupric sulfate, cupric nitrate, and the like.

As the activated carbon fiber material, either one activated by activating a special fiber precursor, or one made by impregnating and adhering activated carbon to urethane foam can be used. These products are commercially available; the former is activated carbon fiber Taractib, and the latter is Kurashito (both products of Kuraray Chemical Company).

registered trademark), etc. These can take various forms such as fiber, felt, cloth, and paper.

In order to support the above-mentioned drugs on the activated carbon fiber material, these drugs can be dissolved in water, impregnated into the fiber material, and dried.
At this time, a small amount of water may be diluted with alcohol to shorten the drying time. The ratio of the amount of the drug supported on the activated carbon fiber material depends on the material and thickness of the fiber material, but is preferably about 0.1 to 10 g per sheet (10 x 10 cm, 5 mm thick) of about 2.3 g, preferably 0.45 g. ~5g. If the amount carried is less than this range, the life will be shortened,
If the amount exceeds this range, clogging is likely to occur, and the passage speed of the target gas is reduced, making it impossible to obtain sufficient deodorizing performance.

Furthermore, in order to improve the deodorizing effect of the product of the present invention, it is sufficient to support a wetting agent. Such wetting agents include ethylene glycol, glycerin, diethylene glycol, magnesium chloride, calcium chloride, and the like. As a method for supporting the drug, it may be used by dissolving it in water at the same time as supporting the drug. The amount added is, for example, 0.1 to 10 g of glycerin, preferably 1 to 5 g, per activated carbon fiber material of the above-mentioned size. If the amount is less than this range, it is difficult to obtain the effect as a wetting agent, and if it is more than this range, it becomes sticky and warped, reducing the effect.

Odor components that can be deodorized include hydrogen sulfide, if the agent supported on the activated carbon fibers is a ferric compound or a cupric compound.
acidic components such as sulfur-containing compounds such as mercaptans,
It can be applied to any basic components such as nitrogen-containing compounds such as ammonia and amines, and potassium permanganate is effective in removing the above acidic components.

The deodorizing material of the present invention can be used in various forms depending on the form of the activated carbon fiber material used.For example, the deodorizing material of the present invention can be used in the form of cloth or felt and can be attached as a filter to the exhaust port of a near conditioner or vacuum cleaner to deodorize exhaust gas. It can be carried out. Alternatively, a fibrous deodorizing material can be wrapped in nonwoven paper or the like and placed in a suitable location in the room to remove odors from cupboards, shoe racks, kitchens, toilets, etc. Further, the above-mentioned ferric compound, cupric compound, and potassium permanganate may be used in combination, or each drug may be supported on separate activated carbon fiber materials to be used as a plurality of filters. These methods are useful when the acidic component deodorizes malodorous gases in significantly greater quantities than the basic component.

[Effect]

Although activated carbon fiber materials are known to have a deodorizing effect, they alone are not sufficient. That is, compared to granular activated carbon, the rate of adsorption of malodorous components is high, but the rate of desorption due to changes in temperature and humidity is also high. The present invention utilizes the three-dimensionally porous and extremely large outer surface area of activated carbon fiber material to support a specific drug, thereby significantly improving deodorizing ability through physical adsorption and chemical changes of malodorous components. It was planned. If the malodor is a basic component, ferric compounds and cupric compounds are deodorized by water that lowers the pH of the drug and a neutralization reaction with the basic component; if the malodor is an acidic component, the drug is oxidized. It is decomposed and deodorized by action. The use of humectants is very effective in retaining the moisture necessary for the deodorization reaction.

〔Example〕

Example 1. Comparative Example 1 Activated carbon fiber material (trade name [Kurasheet J 1000° manufactured by Kuraray Chemical ■) with a thickness of 5 mm was cut into lQcm square pieces, and ferric sulfate (plso, 2-n) lzo) 2
g was dissolved in 50 ml of water, and the above fiber material was impregnated with this solution and dried. A sample of 1Q mm square was taken from this, placed in a 31-capacity Tetra bag, and after adding 0.51 g of water to retain moisture, it was heat-sealed. Hydrogen sulfide gas (Nz standard) with a concentration of 1100 pp was placed in this container, and changes in the concentration over time were measured.

Also, instead of ferric sulfate, ferric chloride (FeCI3nHz
O) 2g to 5 parts of water Qmj! Measurements were made in the same manner except that the same fiber material was impregnated with the same solution.

For comparison, an activated carbon fiber material not carrying a ferric compound was also measured in the same manner. The results are shown in the table below.

Example 2. Comparative Example 2 Using the sample prepared in Example 1, changes over time were measured in the same manner as the gas to be treated was changed to a gas containing trimethylamine at a concentration of 75 ppm. The results are shown in the table below.

(Left below) Example 3. Comparative Example 3 Activated carbon fiber material (trade name [Cractiv JFT300-
10. Prepare a 10cm square sheet of Kuraray Chemical (manufactured by Kuraray Chemical), add 2g of ferric sulfate and 2g of glycerin to 50% of water.
mj2, and the above fiber material was impregnated with this and dried. The following operations were carried out in the same manner as in Example 1, and a gas containing trimethylamine at a concentration of 75 ppm was used as the gas to be treated, and its change over time was measured. For comparison, the above-mentioned fiber material not supported with ferric sulfate was also measured in the same manner. The results are shown in the table below.

(The following is a blank space) Example 4 Activated carbon fiber material (product name: ``Cractiv JFT200-''
10. A 10 cm square sheet (manufactured by Kuraray Chemical Co., Ltd.) was prepared, 1 g of cupric chloride was dissolved in 4 QmA of water, and the above fiber material was impregnated with this and dried. From this 19
A mm square sample was taken and placed in a 31 capacity Tetra bag, and after adding 5 m of water Q, it was heat sealed. In this container, hydrogen sulfide gas with a concentration of toppm (
(N2 standard) was added, and the change in concentration over time was measured. For comparison, the activated carbon fiber material not carrying cupric chloride was also measured in the same manner. The results are shown in the table below.

(Left below) Example 5. Comparative Example 5 Two 10 cm square pieces of the same activated carbon fiber material as in Example 3 were prepared, KMnOa] and Og were dissolved in 20 ml of water, diluted with 30 ml of alcohol, impregnated into the fiber material, and then dried. I let it happen. 10 more than this one
A mm square sample was taken and placed in a 31 capacity Tetra Pak, and after adding 0.5 ml of water, heat sealing was performed. Hydrogen sulfide gas (N, standard) with a concentration of 1100 pp was placed in this container, and the change in concentration over time was measured.

For comparison, an activated carbon fiber material not supported with KMnO4 was also measured in the same manner. The results are shown in the table below.

(Left below) Example 6. Comparative Example 6 The 19 cm square K M n Oa treated product and untreated product produced in Example 5 were each attached to a frame to serve as a filter, and air containing 3.5 to 5.5 ppm of hydrogen sulfide was filtered at 117 cm.
The following table shows the results of measuring the gas concentration at the outlet.

(Leaving space below) Comparative Example 7 Prepare a polypropylene fabric (product name: Teijin 304S manufactured by Teijin ■) with a locm square size, add 2 g of ferric sulfate to 5 Qm7! of water. It was dissolved in water, impregnated with water, and dried.

Attach this fabric to a frame and use it as a filter to remove 3 hydrogen sulfide.
．． The following table shows the results of measuring the gas concentration at the inlet and outlet by passing air containing 5 to 5.5 ppm at a rate of lpZ.

(The following is a blank space) [Effects of the Invention] The deodorizing material of the present invention utilizes the large surface area of the activated carbon fiber material to support a specific oxidizing agent, thereby dramatically improving the deodorizing effect of malodorous gas. can. In particular, by supporting a ferric compound or a cupric compound, it has a high deodorizing effect against a wide range of malodorous gases such as sulfur-containing compounds or nitrogen-containing compounds. Its manufacturing method is simple;
Because of its form, it can be easily attached to household appliances as a filter for foul-smelling gases, so it has great utility.

Claims (6)

[Claims] (1) Ferric compound, cupric compound in activated carbon fiber material,
A deodorizing material characterized by supporting one or more types selected from potassium permanganate. (2) The deodorizing material according to claim 1, wherein the activated carbon fiber material is cloth-like or felt-like. (3) The deodorizing material according to claim 1 or 2, wherein the ferric compound is ferric chloride, ferric sulfate, or ferric nitrate. (4) The deodorizing material according to claim 1 or 2, wherein the cupric compound is cupric sulfate, cupric chloride, or cupric nitrate. (5) A deodorizing material, characterized in that the deodorizing material according to claim 1 further contains a wetting agent. (6) A household appliance, characterized in that the deodorizing material according to claim 2 is provided as a filter in a vacuum cleaner or an air conditioner.