JPH05317702A - Activated carbon fiber having deodorizing activity - Google Patents

Abstract

PURPOSE:To make high deodorizing effect of a persimmon fruit juice durable for a long time by carrying the persimmon fruit juice on an activated carbon fiber. CONSTITUTION:A persimmon fruit juice is spread on an activated carbon fiber. This persimmon fruit juice can be obtd. e.g. by compressing or grinding raw persimmon fruits from which seeds are removed if necessary, and separating and recovering the fruit juice. As the kind of the persimmons, either sweet persimmons (completely sweet and incompletely sweet persimmons) or astringent persimmons (completely astringent and incompletely astringent persimmons) can be used. The degree of ripeness of the persimmon is not specifically restricted but an unripe fruit is more pref. In addition, the activated carbon fiber is not specifically restricted and either coal type, petroleum type, phenolic resin type, PAN type or cellulosic type can be used. In addition, the amt. of carrying or spreading of the persimmon fruit juice liq. to the activated carbon fiber (in terms of solid content) is pref. about 15-30% based on the amt. of the fiber. As the result, high deodorizing effect of the persimmon fruit juice can be kept for a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an activated carbon fiber which is excellent in deodorizing or deodorizing properties, particularly by removing ammonia.

[0002]

2. Description of the Related Art It is known that persimmon juice has an effect of deodorizing or deodorizing odors from various sources, as disclosed in, for example, Japanese Patent Publication No. 3-61457.
However, with the use means described in this publication, it is difficult to say that its deodorizing performance is satisfactory. For example,
According to the disclosure of this publication, when adsorbed on a porous biscuit material, or when impregnated into a fiber material such as paper and used, a sufficient deodorizing or deodorizing effect is not exhibited,
The duration of the effect is also relatively short.

The inventor of the present invention has found that granular activated carbon (coal-based, coconut-based,
I tried to use wood type). However,
Even in this case, although the improvement of the deodorizing effect is recognized,
It turned out that the degree is not yet satisfactory.

[0004]

Therefore, according to the present invention, the persimmon juice is highly effective in deodorizing and deodorizing.
The main purpose is to provide a new material that maintains its effect.

[0005]

Means for Solving the Problems As a result of earnest research in view of the problems of the prior art as described above, the present inventor found that when persimmon juice is carried on activated carbon fiber (hereinafter referred to as ACF). , It was found that the high deodorizing or deodorizing effect of persimmon juice can be maintained for a long period of time.

That is, the present invention provides the following activated carbon fiber and deodorizing material: 1 Activated carbon fiber having deodorizing ability characterized by having persimmon juice juice attached thereto; 2 above-mentioned item 1 A deodorizing material comprising the activated carbon fiber described in 1.

The persimmon juice used in the present invention can be obtained by, for example, pressing or crushing raw persimmon fruits from which seeds have been removed, if necessary, in the same manner as in the production of ordinary juices, and separating and recovering the juice. can get. The type of persimmon may be either sweet persimmon (complete sweet persimmon and incomplete sweet persimmon) and astringent persimmon (complete perfect persimmon and incomplete sweet persimmon). The degree of maturity of persimmon is not particularly limited, but unripe fruits are preferable. This is because the sugar content increases as the fruit ripens, and the amount of the deodorizing or deodorizing active ingredient relatively decreases. In addition, persimmon juice may be used after removing sugars that hardly exert the deodorizing or deodorizing effect or by concentrating to increase the concentration of the active ingredient. In the specification of the present application, not only the fruit juice itself separated from the fruit, but also sugar juice removed from the fruit juice, fruit juice concentrated, and additives (antioxidant for preventing deterioration of the active ingredient in the fruit juice, etc. "Persimmon juice liquid", including those with added agents, preservatives, antifungal agents, etc.

The origin of ACF used in the present invention is not particularly limited, and it may be any of coal-based, petroleum-based, phenol resin-based, PAN-based, cellulose-based and the like. The ACF is not particularly limited,
Usually fiber diameter 1 ~ 30μm, fiber length 0.1 ~ 300mm
It is preferable to use those having a pore size of about 5 to 15 angstroms and a specific surface area of about 500 to 2000 m ² / g.

Further, the ACF may be used in a state of being processed into an arbitrary form such as a felt shape, a paper shape, a plate shape by a wet or dry method according to a conventional method, or a porous base material (foamed resin, metal). (Netted sheet, plastic netted sheet, metal perforated plate, plastic perforated plate, etc.) may be used after being subjected to flocking processing. Furthermore, in the present invention, a honeycomb paper obtained by secondary processing of these primary processed products, a honeycomb block,
It may be used in the form of a pleated felt, a sintered sheet, a sintered block or the like. Therefore, in the present specification, not only the ACF itself but also the above-mentioned primary processed product and secondary processed product are referred to as “ACF”.

The amount of persimmon fruit juice carried or impregnated (as solid content) with respect to ACF is about 2 to 50% by weight of ACF,
More preferably about 5 to 40%, still more preferably 15
It is about 30%.

[0011] Supporting or attachment of persimmon juice to ACF is not particularly limited, and it can be carried out by any method such as impregnating persimmon juice with ACF or spraying persimmon juice onto ACF.

[0012]

EFFECTS OF THE INVENTION According to the present invention, the persimmon juice liquid preliminarily supported on the activated carbon fiber has a large outer surface area, a large specific surface area, and a fine pore characteristic different from that of the granular activated carbon (for example, fine pores). Due to the radius distribution, the surface characteristics of the pores based on the difference in the pore structure, etc.), it specifically reacts with the odorous components adsorbed on the activated carbon fibers to efficiently decompose and remove the odorous components.

Further, the deodorizing or deodorizing effect of the persimmon juice liquid is maintained for a longer time.

Therefore, the activated carbon fiber according to the present invention is useful as a deodorizing material, particularly as a deodorizing material exhibiting an extremely excellent effect in removing ammonia odorous components. More specifically, it is particularly useful as a deodorizing material in various deodorizing filters, deodorizing masks and the like.

[0015]

EXAMPLES Examples and comparative examples will be shown below to further clarify the characteristics of the present invention.

Example 1 A perfume juice liquid (trade name "Pancil SH-10L", manufactured by Release Kagaku Kogyo Co., Ltd.) diluted to 20% was added to ACF felt (Osaka Gas Chemical Co., Ltd., ACF basis weight 100 g).
/ M ² , specific surface area 1000 m ² / g, 50 mm x 75 m
m) was dipped, and persimmon juice liquid (as solid content) of about 24% of the ACF felt weight was attached.

The ACF felt impregnated with this persimmon juice liquid was placed in a test container (volume: 500 ml), and further, Table 1 below.
The test gas containing the odorous component shown in was introduced and allowed to stand to conduct an adsorption test.

Table 1 Initial concentration of odor components (ppm) Ammonia 3400 Trimethylamine 1900 Hydrogen sulfide 500 Methyl mercaptan 20 Adsorption results of each odor component after 15 minutes and 30 minutes are shown in the following tables as residual ratios.

The following tables also show the results for the ACF felt to which persimmon juice was not impregnated as a comparative example.

Table 2 Ammonia removal residual rate (%) 15 minutes later 30 minutes later Invention product 0.9 0.9 Comparative example product 29.4 29.4 Table 3 Trimethylamine removal residual rate (%) 15 minutes 30 minutes later After present invention product 0.6 0.5 Comparative example product 1.3 1.1 Table 4 Hydrogen sulfide removal residual rate (%) 15 minutes later After 30 minutes Invention product 0.0 0.0 Comparative example product 0.0 0.0 Table 5 Methyl mercaptan removal residual rate (%) 15 minutes later 30 minutes later Invention product 1.5 0.5 Comparative example product 1.5 1.0 Example 2 ACF felt weight is 145 g / m ^2. Moreover, persimmon juice was impregnated in the same manner as in Example 1 except that the shape was circular with a diameter of 38 mm.

ACF felt 5 impregnated with this persimmon juice
Using a sheet (ACF weight 0.85 g), an adsorption test of ammonia was conducted by a flow method for a test gas having an ammonia content of 100 ppm. The gas flow rate is 6.3.
1 / min.

The result is shown as curve 1 in FIG. It is clear that the product of the present invention can maintain a good ammonia adsorption capacity for a long time.

The ACF felt impregnated with the persimmon juice obtained in the same manner as above was allowed to stand for 6 months and then subjected to an ammonia adsorption test in the same manner as above. No deterioration in adsorption performance was observed. .

Comparative Example 1 Five ACF felts (ACF weight 0.85 g) similar to those used in Example 2 were subjected to the same ammonia adsorption test as in Example 2 without impregnating persimmon juice.

The result is shown as curve 2 in FIG. It is clear that breakthrough occurs within a short period of time when the persimmon juice liquid is not attached.

Comparative Example 2 Persimmon juice was impregnated in the same manner as in Example 1 using coconut husk activated carbon (average particle size 0.1 mm) having a specific surface area of 1000 m ² / g. The amount of persimmon fruit juice impregnated (solid content) with respect to the weight of activated carbon was about 24%.

1.06 g (activated carbon 0.85) of activated carbon impregnated with the persimmon juice obtained was placed in a cylindrical container having an inner diameter of 10 mm.
g) Filled and tested as in Example 2.

The result is shown as curve 3 in FIG. It is clear that the ammonia adsorption capacity decreases considerably more rapidly over time than when using activated carbon fibers (curve 1).

Comparative Example 3 Nonwoven fabric of polyester fiber of 60 g / m ² (50 mm ×
(75 mm) was immersed in a persimmon juice solution (20% diluted solution) in the same manner as in Example 1, allowed to stand for 30 minutes, then pulled up and dried. Then, an ammonia adsorption test was conducted in the same manner as in Example 1. The results were as follows.

[0030]

[Brief description of drawings]

FIG. 1 is a graph showing the ammonia adsorption capacity of each material obtained in Example 1, Comparative Example 1 and Comparative Example 2 of the present application.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Fujita 4-1-2 Hirano-cho, Chuo-ku, Osaka City, Osaka Prefecture Osaka Gas Co., Ltd.

Claims (2)

[Claims] 1. An activated carbon fiber having a deodorizing ability, which is obtained by impregnating persimmon juice. 2. A deodorizing material comprising the activated carbon fiber according to claim 1.