JPH0549300B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a deodorizer capable of deodorizing nitrogen-based and sulfur-based malodors by decomposing them. (Prior art) Conventionally commonly used deodorization methods include sensory deodorization using masking with fragrances, physical deodorization using the adsorption effect of activated carbon, zeolite, cyclodextrin, etc., and acids and alkalis. There are two types of deodorization: chemical deodorization using chemical deodorization, reaction with plant essential oils, thermal decomposition, etc., and biological deodorization using aeration, scrubbers, etc. However, when the balance of masking is disrupted, sensory deodorization returns to a bad odor, and cannot be a fundamental countermeasure against bad odors. In addition, physical deodorization has a limited adsorption capacity, and zeolite, which is particularly widely used, selectively absorbs water and may re-release adsorbed malodorous components. Chemical deodorization works only on specific odors, and acids and alkalis are dangerous to handle. Furthermore, biological deodorization requires large-scale equipment and is expensive to maintain. (Problems to be Solved by the Invention) The present invention solves the drawbacks of the conventional deodorizing means described above and decomposes nitrogen-based and sulfur-based bad odors, thereby safely and reliably achieving excellent deodorizing effects. This product was developed to provide an inexpensive deodorant that can provide the following benefits. (Means for Solving the Problems) The first invention made to solve the above problems is to contain silver in glass containing P ₂ O ₅ as a main component, and to produce pure silver at 20°C from this glass. underwater
The dissolution rate of PO ₄ ^3- ion is 10 ^-5 to 10 ^-1 g/1 glass.
g/Hr, and the dissolution rate of Ag ⁺ ions is controlled to 10 ^-8 to 10 ^-6 g/1 g of glass/Hr. In addition, the second invention includes copper in a glass containing P ₂ O ₅ as a main component, and increases the dissolution rate of PO ₄ ^3- ions from this glass in pure water at 20°C to 10 ^-5 ~
10 ^-1 g/1 g of glass/Hr, the dissolution rate of Cu ²⁺ ions is
It is characterized by being controlled to 10 ^-7 to 5 x 10 ^-5 g/11 g/Hr of glass. Furthermore, in the third invention, iron is contained in a glass mainly composed of P ₂ O ₅ , and the dissolution rate of PO ₄ ^3- ions from this glass in pure water at 20°C is increased to 10 ^-5 ~
10 ^-1 g/1 g of glass/Hr, the dissolution rate of Fe ³⁺ ions is
It is characterized by being controlled to 10 ^-7 to 5×10 ^-5 g/1 g of glass/Hr. As described above, in the present invention, a phosphate glass containing P ₂ O ₅ as a main component and containing metals such as silver, copper, and iron is used. The dissolution rate of PO ₄ ^3- ions in pure water at 20 °C from this glass is 10 ^-5 ~
10 ^-1 g/glass 1g/Hr. However, this measurement of dissolution rate is performed with glass particle size of 425 to 600 μm, and all dissolution rate measurements in this specification are performed by immersing glass with particle size of 425 to 600 μm in pure water at 20°C. shall be carried out. By using phosphate-based glass in this way, the dissolution rate of PO ₄ ^3- ions was set at 10 ^-5 to 10 ^-1 g/1 g of glass/Hr because PO ₄ ^3- ions are dissolved in ammonia and other substances. This is because it is suitable for decomposing nitrogen-based odors. If the dissolution rate of PO ₄ ^3- ions is less than 10 ^-5 g/1 g of glass/Hr, the reaction rate with malodorous substances will be slow and sufficient deodorizing effect will not be achieved ^; This is because if the amount exceeds ¹ g/glass/1 g/Hr, a reaction with moisture in the air will occur, making handling difficult. In the first invention, silver is contained in such a glass, and the dissolution rate of Ag ⁺ ions from the glass is controlled to 10 ^-8 to 10 ^-6 g/1 g of glass/Hr. Further, in the second invention, copper is contained and the dissolution rate of Cu ²⁺ ions is controlled to 10 ⁻⁷ to 5×10 ⁻⁵ g/1 g of glass/Hr. Furthermore, in the third invention, iron is contained, and the dissolution rate of Fe ³⁺ ions is increased from 10 ^-7 to 5×
Control at 10 ^-5 g/glass 1g/Hr. It is also possible to contain two or more metals at the same time, but in this case it is necessary for each metal to have the above-mentioned ion dissolution rate. These Ag ⁺ ions, Cu ²⁺ ions, and Fe ³⁺ ions are all H ₂ S,
Suitable for decomposing sulfur-based odors such as CH ₃ SH. The reason for limiting the dissolution rate of each ion as described above is that if it falls below these numerically limited ranges, the deodorizing effect will be small, and conversely, if it exceeds the numerically limited ranges, metals will easily precipitate during glass melting. This is because it becomes difficult to manufacture glass. Further, in the deodorant of the present invention, it is preferable to use glass having a grain size of 100 μm or less in order to increase the specific surface area. Although the specific method for controlling the dissolution rate of the various ions mentioned above within a predetermined range has not been theoretically elucidated, for example, the glass composition and particle size may be adjusted based on empirical rules. This allows arbitrary control to some extent. For example, in terms of glass composition, when an alkali metal is added to a glass whose main component is P ₂ O ₅ , the dissolution rate of the glass increases, and when an alkaline earth metal is added, the dissolution rate of the glass tends to slow down. is known as a rule of thumb among those skilled in the art. It is also known that the smaller the particle size, the greater the specific surface area, the larger the reaction surface, and the faster the glass melting rate. Therefore,
By adjusting the glass composition, particle size, etc., the melting rate of the glass can be controlled arbitrarily. Then, the composition of the glass is adjusted to have a predetermined dissolution rate, and the contents of P ₂ O ₅ and the metal components Ag ₂ O, Cu ₂ O, and FeO are adjusted to a constant ratio based on empirical rules. For example, the dissolution rate of various ions can be easily controlled within a predetermined range. Examples of the present invention are shown below. (Example) Example 1 Magnesium phosphate [Mg ₃ (PO ₄ ) ₂ ] 94.26 g and 89
% phosphoric acid [H ₃ PO ₄ ] and 4.0 g of silver oxide were mixed and held at 300°C for 3 hours, and then the dried product was melted at 1300°C for 1 hour to create glass. This was crushed to obtain the sample of Example 1 in Table 1. Example 2 71.36 g of potassium phosphate [K ₂ HPO ₄ ], 38.29 g of monobasic calcium phosphate [Ca(H ₂ PO ₄ ) _{2.H 2} O], 23.54 g of cuprous oxide [Cu ₂ O], and carbon 0.2g and 89
% phosphoric acid [H ₃ PO ₄ ] 117.72g and heated to 300℃℃
The dried product was kept at 1200°C for 3 hours, and then the dried product was
A glass was prepared by melting for a period of time, which was crushed to form the sample of Example 2 in Table 1. Also, in order to find the valence of copper in the created glass, 0.5g of powder was mixed with 1/10K ₂ Cr ₂ O ₇ (1+4)H ₂ SO ₄
After completely dissolving in 25ml and adding 3 drops of Orphenanthroline medicine as an indicator, 1/10FeSO ₄
Titration with (NH ₄ ) ₂ SO ₄ .6H ₂ O revealed that monovalent copper ions accounted for 71% of the copper in the glass. Example 3 71.36g of potassium phosphate and monobasic calcium phosphate
38.05g, 26.17g of copper oxide and 117.72g of phosphoric acid,
A glass was prepared in the same manner as in Example 2, and it was crushed to obtain the sample of Example 3 in Table 1. Furthermore, when we measured monovalent copper ions among the copper in the glass, we found that 9
It was %. Similarly, Examples 4 to 5 and Comparative Examples 1 to
No. 3 phosphoric acid glass was prepared. This is shown in Table 1. Note that Comparative Example 4 is a normal tableware glass. The dissolution rate in Table 1 is for glass with a particle size of 425 to 600 μm.
Calculated from the weight loss rate after immersing 0.6 g in 100 ml of distilled water at 20°C. The upper value is the dissolution rate of PO ₄ ^3- ions, and the lower value is the dissolution rate of metal ions.

[Table] Samples of Examples and Comparative Examples shown in Table 1
1 g was placed in a glass container with a capacity of 2000 ml, and a fixed amount of each malodorous substance of ammonia, hydrogen sulfide, and methyl mertaptan was injected using a syringe. Next, the concentration of the malodorous substance immediately after injection and after 1 hour was measured using a Kitagawa glass detection tube. The result is the second
Tables 3 and 4 are as shown. Note that all numerical values are average values of values measured twice. Thus, it can be seen that the deodorant of the present invention exhibits an excellent deodorizing effect on both nitrogen-based and sulfur-based malodors.

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[Table] (Effects of the invention) As is clear from the above data and explanation,
The deodorant of the present invention contains silver, copper, and iron in phosphate-based glass, and sets the dissolution rate of PO ₄ ^3- ions, Ag ⁺ ions, Cu ₂ ⁺ ions, and Fe ³⁺ ions within a specific range. By doing so, it is possible to decompose nitrogen-based and sulfur-based malodors and exhibit an excellent deodorizing effect, and the deodorizing effect can be freely changed by adjusting the composition of the glass. Furthermore, the deodorant of the present invention does not have the dangers of acids, alkalis, etc., and can exhibit stable effects over a long period of time by controlling the dissolution rate. Furthermore, the deodorant of the present invention is inexpensive;
It is also highly economical. Therefore, the present invention greatly contributes to the development of industry as a deodorant that eliminates the problems of the conventional deodorizers.

Claims (1)

[Claims] 1. Silver is contained in a glass whose main component is P ₂ O ₅ , and silver from this glass in pure water at 20°C is
The dissolution rate of PO ₄ ^3- ion is 10 ^-5 to 10 ^-1 g/1 glass.
A deodorant characterized in that the dissolution rate of Ag ⁺ ions is controlled to 10 ^-8 to 10 ^-6 g/1 g of glass/Hr. 2 Copper is contained in glass whose main component is P ₂ O ₅ , and the glass is dissolved in pure water at 20°C.
The dissolution rate of PO ₄ ^3- ion is 10 ^-5 to 10 ^-1 g/1 glass.
g/Hr, the dissolution rate of Cu ²⁺ ions is 10 ^-7 ~ 5×
A deodorant characterized by controlling the concentration to 10 ^-5 g/1 g of glass/Hr. 3 Iron is contained in a glass whose main component is P ₂ O ₅ , and the glass is dissolved in pure water at 20°C.
The dissolution rate of PO ₄ ^3- ion is 10 ^-5 to 10 ^-1 g/1 glass.
g/Hr, the dissolution rate of Fe ³⁺ ions is 10 ^-7 ~ 5×
A deodorant characterized by controlling the concentration to 10 ^-5 g/1 g of glass/Hr.