JP2541520B2 - Deodorant - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorant, particularly a deodorant suitable for deodorizing a basic malodorous gas.

(Prior Art) With the improvement of living standards, interest in odors (odors) in the living environment has increased in recent years.

Deodorants are often used as a measure against odors in the living environment, but in most cases deodorants use activated carbon as an active ingredient.

(Problems to be solved by the invention) Activated carbon selectively and extremely well absorbs malodorous components in the air, and since it is porous, it has a large adsorption capacity, is easy to handle, and is highly safe. It is a deodorant suitable for use in (home life).

Thus activated carbon is an excellent deodorant, but
Activated carbon has a big problem that its ability to adsorb and deodorize basic gases such as ammonia gas is extremely small.

(Means for Solving the Problems) In order to solve this problem, the present inventors have conducted various searches for compounds capable of removing a basic malodorous substance, and found that Al ₂ O ₃ / P ₂ O ₅ The inventors have found that aluminum phosphate having a molar ratio within a specific range is suitable, and have completed the present invention.

That is, the deodorant of the present invention is characterized by containing a compound represented by the following chemical formula (1) as an active ingredient.

AlH _{3 (x-1)} (PO ₄ ) _x .nH ₂ O (1) However, x = 1.2 to 2.2.

Specifically describing the compound represented by the above formula (1) in the present invention, AlH ₃ (PO ₄ ) ₂ .3H ₂ O, AlH ₃ (PO ₄ ) ₂
-H ₂ O, a mixture thereof, or the like can be given.

The AlH ₃ (PO ₄ ) ₂ .3H ₂ O and the like used in the present invention can be used as the deodorant of the present invention in any method obtained, for example, phosphoric acid aqueous solution and aluminum hydroxide. Alternatively, and / or by reacting with an oxide to form a transparent aqueous solution of aluminum phosphate, the aqueous solution of AlH ₃ (PO
₄₎ was inoculated with 2 _· 3H ₂ O crystals, and stirred at a temperature of 30 ° C. to 70 ° C., those obtained by crystallization is preferably used.

Such a powdered form AlH ₃ obtained _{(PO 4) 2 · 3H 2} O is less hygroscopic, and its aqueous solution shows acidity. As will be understood from that described _{above, AlH 3 (PO 4) 2} · 3H 2 O is found to be very suitable as a deodorant of the basic gas.

In the present invention, AlH ₃ (PO ₄₎ as a specific means used as deodorant and 2 _· 3H ₂ O or the like, any method can be adopted. For example, paper and AlH ₃ (PO ₄₎ between the paper scissors powders such 2 _· 3H ₂ O in a sandwich-like, may be used as absorbent paper, also _{AlH 3 (PO 4) 2 ·} 3H 2 O , etc. It is also possible to granulate the powder of No. 1 to a specific particle size and use it.

In any of the methods, the substance represented by the formula (1) can effectively adsorb and remove a malodorous basic gas such as NH _{3 which} could not be effectively deodorized by activated carbon.

Furthermore, absorbent paper sandwiched sandwich the AlH ₃ (PO ₄₎ powders such 2 _· 3H ₂ O in between the paper and the paper is easy to handle, yet clean since the powder is whitish Therefore, it can be suitably used for a wide range of applications such as hygiene products, territories products and animal excrement mats.

(Example) Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1 78 g of Al (OH) ₃ (hydrargillite type) and 346 g of orthophosphoric acid having a concentration of 85% by weight were mixed so that the Al ₂ O ₃ / P ₂ O ₅ molar ratio was 1/3, and the mixture was vigorously mixed. 10 on a weak flame with stirring
It heated at 0-110 degreeC and the transparent aluminum phosphate aqueous solution was obtained.

This transparent aluminum phosphate aqueous solution is cooled to 30 to 50 ° C., AlH ₃ (PO ₄ ) ₂ .3H ₂ O crystals are added as seed crystals, and the mixture is sufficiently stirred to allow the crystals to be mixed with the entire aluminum phosphate aqueous solution. Dispersed. When this aluminum phosphate aqueous solution is left to stand for 1 day with stirring at 30 to 50 ° C., a white fixed substance begins to precipitate.

The white solid was suction filtered, washed with water and then with methyl alcohol, and then dried at 50 ° C. to obtain a white powder. This white powder shows AlH ₃ (PO ₄ ) from X-ray diffraction crystals.
It was confirmed that it was a ₂ · 3H ₂ O.

Next, N ₂ gas containing 800 ppm NH ₃ in a Teflon bag
2.5 put, this AlH ₃ (PO ₄₎ obtained in the above 2 _· 3H ₂ O powder 1.0g was added and measured concentration change of NH ₃ in the gas by Kitagawa detecting tube. The result is shown in the curve 1 of FIG.

Example 2 AlH ₃ obtained in Example _{1 (PO 4) 2 · 3H} 2 O 50g by adding water 5Kg a slurry, and the mixture was stirred at room temperature for 1 hour. Next, this slurry was filtered, the obtained powdery cake was washed with water, and then dried at 50 ° C. The chemical analysis values of the dried powder are shown below, and the X-ray diffraction pattern is shown in FIG.

Analytical value P ₂ O ₅ 45.0% by weight Al ₂ O ₃ 23.3% by weight Loss on drying (235 ℃ × 4h) 26.8% by weight Loss on ignition (1100 ° C × 1h) 6.8% by weight From the above chemical analysis values, the composition of this powder is Chemical formula AlH
It is represented by _1.17 (PO ₄ ) _1.39 and 3.26H ₂ O. But X-ray diffraction peaks of the second figure AlH ₃ (PO ₄₎ consistent with the 2 _· 3H ₂ O. This means that AlH ₃ (PO ₄ ) ₂ .3H ₂ O is hydrolyzed in water to amorphous aluminum triphosphate and H ₃ PO ₄ and contains amorphous aluminum triphosphate. It seems to have changed.

Using this powder, the change in NH ₃ concentration was measured in the same manner as in Example 1. The result is shown by the curve 2 in FIG.

The density was measured of the NH ₃ in Comparative Example _{1 AlH 3 (PO 4) 2} · 3H 2 O the same manner as in Example 1 using a commercially available active carbon 1.0g instead of. The result is shown by the curve 3 in FIG.

From the above results, it can be seen that the deodorant of the present invention produced in Examples 1 and 2 has a very high NH ₃ gas adsorption capacity as compared with the commercially available activated carbon.

[Brief description of drawings]

FIG. 1 is a diagram showing changes with time of the NH ₃ concentration in Examples and Comparative Examples. In the figure, curve 1 shows the case of Example 1, curve 2 shows the case of Example 2, and curve 3 shows the case of Comparative Example 1. FIG. 2 shows the X-ray diffraction pattern of the powder obtained in Example 2.

Claims (1)

(57) [Claims] 1. A deodorant comprising a compound represented by the following chemical formula as an active ingredient. AlH _{3 (x-1)} (PO ₄ ) _x .nH ₂ O However, x = 1.2 to 2.2.