JPH0716606B2 - Deodorant - Google Patents

Description

TECHNICAL FIELD The present invention relates to a novel deodorant.

(Prior Art) There are numerous methods for deodorizing exhaust gas or deodorizing ambient air. For example, masking with an aromatic substance, deodorization by adsorption, deodorization using a chemical reaction, a method of allowing a microorganism such as a bacterium or yeast to act, or a method of a combination thereof is used.

Of these methods, masking does not inherently remove odors nor can it reduce the concentration of harmful gases.

The method other than this is roughly classified into a solid treatment and a liquid treatment, depending on the method used.

There are two types of treatment with solids: a large-scale system in which the gas to be treated is passed through a column filled with granular or powdery solids, and a small-scale system in which a container filled with solids is left in a treated space such as a refrigerator. Is a method of bringing the liquid and the gas to be treated into contact with each other using a packed tower or a shower in the empty tower,
There is a method in which a gas to be treated is introduced into the liquid to cause bubbling.

In addition, at home, the liquid may be sprayed and processed, but this is only a temporary process.

Among these methods, the treatment with liquid has a problem that treatment of the used liquid is problematic on a large scale, and is not suitable for continuous treatment for household use.

In the treatment method with a solid, an adsorption method using activated carbon, zeolite, activated clay silica gel, etc. is generally used. Among them, activated carbon has a large adsorption capacity as compared with other adsorbents and is most used. However, activated carbon has a drawback that it has a low adsorption rate for highly polar gases such as ammonia, hydrogen sulfide, and aldehydes, and needs to have a low exhaust gas passage rate. It was

Among the treatment methods using solids, the methods utilizing chemical reactions include
There are many types depending on the target gas to be treated. For example, for ammonia and lower amines, a method using sulfonated coal, exhaust gas of automobiles, exhaust gas of fan heaters, and combustion exhaust gas of cigarette smoke. Examples include a method of using activated carbon impregnated with sodium thiosulfate or sodium sulfite, a method of using a cation exchange resin or anion exchange resin for an acidic gas or an alkaline gas, but each has a small adsorption capacity. .

In addition, as a special example, for the purpose of removing lower aldehydes, it has been proposed to adsorb hydrazine or aniline on activated carbon or to adsorb aniline or benzylamine on a clay mineral, but these are also the target gas. However, there are drawbacks such as a decrease in adsorption capacity when water is contained and a low adsorption rate, which is not satisfactory.

(Problems to be Solved) The present invention solves the above-mentioned drawbacks and has a high adsorption rate,
The deodorant has a large adsorption capacity.

(Means for Solving Problems) The present invention is to support polyallylamine on a porous clay mineral or carbon containing an oxide or a composite oxide composed of at least one of Si, Al and Mg oxides as a constituent component. Is an adsorbent.

The oxides or complex oxides of Si, Al and Mg used in the present invention include oxides such as SiO ₂ , Al ₂ O ₃ and MgO, and SiO.
₂・ nH ₂ O (silica gel), Al ₂ O ₃・ nH ₂ O (alumina gel)
Hydrous oxides such as Al ₂ O ₃ · mSiO ₂ · nH ₂ O and Al ₂ (Si
O ₃ ) ₃ (ie Al ₂ O ₃ · 3SiO ₂ ), Mg ₂ Si ₃ O ₈ · nH ₂ O (ie 2M
gO · 3SiO ₂ · nH ₂ O), and specific examples thereof include montmorillonite, kaolinite, halosite, zeolite, attapulgite, sepiolite, talc, and allophene.

As carbon, activated carbon, amorphous carbon or the like can be used.

The polyallylamine generally has an average molecular weight of about 2,000 to 150,000, but is not limited thereto, and may contain a small amount of allylamine monomer or oligomer.

To support the polyallylamine, the polyallylamine may be sprayed as an aqueous solution on the carrier, immersed, and then dried, or any method such as a method of carrying a salt such as polyallylamine hydrochloride and then neutralizing it may be used. Good.

It is convenient that the deodorant of the present invention is packed in a column to allow the gas to be processed to flow therethrough on a large scale, and is stored in a perforated container on a small scale and left in the space to be processed.

Example 1 (Method for preparing deodorant) Deodorant A Cocoa shell activated carbon (particle size 16 to 32 mesh) 10 g molecular weight 10,00
6 g of an aqueous polyallylamine solution (16.6% by weight) of 0 was added and mixed, and vacuum dried at 60 ° C. for 3 hours to obtain a deodorant A.

Deodorant B Allophane (mSiO ₂ · Al ₂ O ₃ · nH) instead of palm shell activated carbon
₂ O) (trade name SECARD K-3 manufactured by Shinagawa Kasei Co., Ltd.) was used and treated in the same manner as other deodorant A to obtain deodorant B.

Next, except for the gas flow nozzle, the sealed volume is approx.
A 2000 ml nylon / polyethylene laminate bag was filled with 1500 ml of air containing hydrogen sulfide and acetaldehyde as odorous components of 50 ppm and 625 ppm, respectively, and an inner diameter of 5.5 mmφ,
One end of a column filled with 1 g of a deodorant in a glass tube having a length of 150 mm was connected to the nozzle, and a gas detection tube was attached to the other end of the column.
A suction pump (a gas collector manufactured by Gastec Co., Ltd.) was connected in this order.

Operate the suction pump, suction at a speed of 100 ml / 30 seconds, and read the measurement value of the detector tube when the first 100 ml was sucked (measurement value (1)). Next, after sucking 800 ml, the detector tube is replaced, and the measured value of the detector tube when 100 ml is sucked is read (measurement value (2)). The results are shown in Table 1.

Example 2 (Preparation of deodorant) Deodorant C Sepiolite (particle size 4 to 10 mesh) 10 g molecular weight of about 70,
3 g of 000 polyallylamine aqueous solution (15.7% by weight) was added and mixed, and dried under reduced pressure at 60 ° C. for 3 hours to obtain a deodorant C.

Deodorizing agent D A deodorizing agent D was obtained in the same manner as the deodorizing agent C except that zeolite (a spherical Molecular Sieve 13X having a particle size of 8 to 12 mesh) was used in place of sepiolite.

Then, 1 g of the deodorant C or D was put in the same bag as in Example 1,
The bag was adjusted to a concentration of about 50 ppm.

The bag was filled with 1,500 ml of acetic acid-containing air, the mouth was closed, and the bag was left in a room at about 20 ° C., and the acetic acid concentration in the bag was measured over time. For the measurement, an acetic acid detector tube (detection limit 0.2 ppm) was used.

For comparison, the deodorizing performance was also tested when sepiolite and zeolite were used alone. The results are shown in Fig. 1.

From the results shown in FIG. 1, it can be seen that the deodorant of the present invention has excellent deodorizing ability.

[Brief description of drawings]

FIG. 1 is a diagram showing the deodorizing ability of the deodorant C and the deodorant D of the present invention, and sepiolite and zeolite.

Claims (1)

[Claims] 1. A deodorant obtained by supporting polyallylamine on a porous clay mineral or carbon containing an oxide or a complex oxide composed of at least one of oxides of Si, Al and Mg.