JPH0620539B2 - Deodorant - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorant that adsorbs and decomposes malodorous components, such as kitchen garbage, refrigerators, toilets, hospitals, hotels, livestock farms, sewage treatment plants, and others. Widely used for deodorizing.

(Prior Art) Sources of offensive odors are diverse, ranging from food waste, refrigerators, toilets, etc. in daily life to general production plants, livestock farms, sewage treatment plants, etc. Also, there are many places in hospitals, hotels, restaurants, etc. that have a unique, if not stinking, odor. Ammonia, mercaptans, sulfides, amines, acetaldehyde and the like have been attracting attention as substances causing these malodors, but they are actually more complicated and are not limited to these substances. In recent years, as the demand for a technique for removing these malodors has increased, research on the malodor removing technique has become popular, and various methods have been proposed, for example, as follows.

(1) Masking method to eliminate a bad odor by emitting an aromatic substance that is stronger than a bad odor (2) Adsorption method to adsorb a bad odor causing substance using activated carbon or other adsorbents (3) An acid causing a bad odor causing substance Acid for neutralization and removal with alkali, alkali neutralization method (4) Chemical redox method for chemically decomposing malodorous substances (problems to be solved by the invention) There are serious drawbacks. For example, the masking method is not an essential method. The adsorption method has a limited adsorption amount due to the saturated adsorption amount and cannot cope with a strong malodor. The acid and alkali neutralization methods are limited to substances that can be neutralized, and the applicable odors are limited. The chemical decomposition method is considered to be the most promising technology, but so far no one has sufficient capacity. Among them, some methods of utilizing the oxidizing power of chlorine dioxide gas have been proposed. For example, Japanese Patent Publication 48-
32079 discloses a method in which a chlorite aqueous solution is adsorbed on a basic adsorbent to be stabilized, and this is mixed with solid acidic powder to generate chlorine dioxide gas. Further, JP-A-60-161307 discloses a chlorine dioxide gas generating composition in which a porous inorganic carrier is impregnated with an aqueous chlorite solution. However, in the method of generating chlorine dioxide gas, it is difficult to control the amount of generation, and it decomposes even during unused storage, and the efficacy disappears if all chlorite is decomposed. Further, depending on the place of use, the generation of chlorine dioxide gas may not be preferable. On the other hand, JP-A-58-36619 and JP-A-57-1441 disclose that
A deodorant in which phosphoric acid is supported on a carrier such as activated carbon is disclosed. However, according to the study by the present inventors,
Although they have some effect on basic malodorous substances, they are problematic in treating all malodorous substances.

Although each of these above-mentioned methods has a deodorizing effect to some extent and is actually applied, its technical improvement is strongly desired due to the above-mentioned drawbacks.

It is an object of the present invention to provide a deodorant which is versatile, strong and has a long life, which can overcome the drawbacks of the conventional methods.

(Means for Solving Problems) Against this background, the present inventors adsorb various malodors from malodors such as garbage, refrigerators and toilets to livestock farms, garbage treatment plants, sewage treatment plants and the like. As a result of studying a highly active deodorant that decomposes, at least one selected from phosphoric acid, phosphorous acid and hypophosphorous acid, and at least one specific peroxide and / or at least one specific element oxide. The composition consisting of has a high ability of decomposing various malodorous components regardless of acidity and basicity, and found that it is a deodorant which is stable and highly active, and has completed the present invention. It was

That is, the present invention is at least one selected from phosphoric acid, phosphorous acid, hypophosphorous acid and calcium peroxide, sodium peroxide, potassium peroxide, sodium perborate, sodium percarbonate, potassium persulfate, peroxide At least one selected from the group of hydrogen and / or iron, cobalt, nickel, titanium, zirconium, vanadium, chromium,
Molybdenum, tungsten, manganese, copper, silver, zinc,
The present invention relates to a deodorant comprising at least one oxide of an element selected from the group of germanium, tin, lead, magnesium and strontium. The feature is that no gas such as chlorine dioxide is generated during the use of this drug, it decomposes various malodorous components regardless of acidic, neutral or basic substances, and even if it is used or stored for a long period of time, its The effect is unchanged.

Hereinafter, the present invention will be described in detail.

The phosphoric acid, phosphorous acid and hypophosphorous acid (hereinafter referred to as “phosphoric acid etc.”) used in the present invention include these acids and acid anhydrides. These do not have a large deodorizing capacity by themselves, but as described above, the coexistence of a specific peroxide and / or a specific oxide dramatically increases the deodorizing capacity.

The ratio of the above-mentioned specific peroxide and / or oxide in the deodorant is arbitrary, but is preferably 0.1 to 90% by weight, more preferably 0.1 to 60% by weight.

The deodorant of the present invention can be supported or mixed on a commonly used porous carrier. The preferred carrier is
Silica, alumina, silica-alumina, natural zeolite,
Examples thereof include synthetic zeolite, diatomaceous earth, activated carbon, Kanuma soil, clay minerals, etc., but are not particularly limited thereto, and any commonly used carrier or adsorbent can be used. The proportion of the carrier in the deodorant is arbitrary, but is preferably 10 to 90 weight percent, more preferably 30 to 70 weight percent.

The raw material used for the deodorant of the present invention is not particularly limited. What is normally available can be used, and any raw material can be used as long as it can be finally obtained in a preferable compounded form by the preparation. The preparation method is also not particularly limited. For example, it can be prepared by a method of mixing an aqueous solution of phosphoric acid or the like with other component raw materials, followed by drying and, if necessary, firing.

The deodorant of the present invention is used as a solid deodorant,
It can also be used as an aqueous solution as a liquid deodorant. In that case, the total concentration of phosphoric acid and the like is not particularly limited, but is preferably in the range of 1 to 50 weight percent.

The method of using the deodorant of the present invention is not particularly limited. As described above, the deodorant of the present invention can be used in either a liquid state or a solid state, so that its application range is wide. For example, it can be used in a refrigerator, a toilet, etc. by molding it into a granular or pellet shape and filling it into a bag, container or the like having air permeability. Alternatively, the malodorous gas can be forcibly passed through the layer of the deodorant of the present invention for treatment. It is also possible to use by coating or mixing with packaging materials, housing materials such as wallpaper, and the like. Furthermore, it is also possible to spray directly on the source of offensive odors, such as garbage and sludge.

Although the deodorizing mechanism by the deodorant of the present invention is not clear, it is considered that the main component is the catalytic action. Therefore, unlike the adsorbent and the chlorine dioxide generator, it can be used for a long period of time. In addition, since it has high activity, it has an advantage that it is effective against a strong odor in a short time.

(Examples) Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited to these Examples.

Example 1 25 g of 50% aqueous solution of hypophosphorous acid, 25 g of iron sesquioxide and 50 granular silica alumina (alumina content 28 wt.%) 50
g was kneaded, uniformly mixed, and dried at 110 ° C. to obtain a deodorant.

1 g of the obtained deodorant was sealed in a polyethylene container together with 500 m of a test gas containing 1000 ppm of methyl mercaptan, 500 ppm of hydrogen sulfide, and 500 ppm of ammonia, which had been prepared in advance, and each concentration change was measured. The results are shown in Table 1. It was confirmed that the odor was actually odorless when the concentrations of the three became zero.

Examples 2 to 11 In the same manner as in Example 1, deodorants having the compositions shown in Table 1 were obtained. For each of them, the deodorizing effect was examined in the same manner as in Example 1. The results are shown in Table 1.

Examples 12 to 18 In the same manner as in Example 1, deodorants having the compositions shown in Table 2 were obtained. For each of them, the deodorizing effect was examined in the same manner as in Example 1.

The results are shown in Table 2.

Example 19 After adding 50 g of 50% aqueous solution of hypophosphorous acid to 50 g of powdered activated carbon and mixing, 25 g of calcium peroxide was further added and uniformly mixed, and dried at 110 ° C. to obtain a deodorant.

The deodorizing effect of the obtained deodorizing agent was examined in the same manner as in Example 1. The results are shown in Table 3.

Examples 20 to 21 In Example 19, the deodorant having the composition shown in Table 3 was obtained in the same manner except that 50 g of a 50% phosphorous acid aqueous solution and 50 g of a 50% phosphoric acid aqueous solution were used instead of the hypophosphorous acid. .
For each of them, the deodorizing effect was examined in the same manner as in Example 1.
The results are shown in Table 3.

Comparative Examples 1 to 3 Compositions shown in Table 4 were obtained in exactly the same manner as in Examples 19 to 21 except that calcium peroxide was not added. For each of them, the deodorizing effect was examined in the same manner as in Example 1, and the results are shown in Table 4.

Example 22 50 g 50% aqueous solution of hypophosphorous acid, 25 sodium hydroxide
g and 50 g of activated carbon were kneaded in the presence of a small amount of water, uniformly mixed, and dried at 110 ° C. to obtain a deodorant. The deodorizing effect of the obtained deodorizing agent was examined in the same manner as in Example 1.
The results are shown in Table 5.

Examples 23 to 26 In the same manner as in Example 22, deodorizing agents having the compositions shown in Table 5 were obtained, and the deodorizing effect was examined by the same operation as in Example 1.
The results are shown in Table 5.

Example 27 20 g of 50% aqueous solution of hypophosphorous acid was added to 40 g of powdered activated carbon and mixed, and then 20 g of zinc oxide and 20 g of calcium peroxide were further added, mixed uniformly and dried at 110 ° C. to remove the deodorant. Then, the deodorizing effect was examined by the same operation as in Example 1. The results are shown in Table 6.

Examples 28 to 31 In the same manner as in Example 27, deodorizing agents having the compositions shown in Table 6 were obtained, and the deodorizing effect was examined in the same manner. The results are shown in Table 6.

Example 32 In Examples 1 to 18, phosphorous acid or phosphorous acid was used in place of hypophosphorous acid, and the deodorant was obtained in the same manner as in Examples 1 to 18 except that the same as in Example 1. When the deodorizing effect was examined, almost the same results as in Examples 1 to 18 were obtained.

Examples 33 to 34 Dewatered cake of sludge used for sewage treatment (water content 80%)
100 g was placed in a glass bottle 2 and 2 g of the deodorant obtained in each of Examples 27 and 28 was sprinkled on each, sealed and left at 30 ° C. After 24 hours, the concentrations of hydrogen sulfide and methyl mercaptan were measured. When the deodorant was not used, it was 200 ppm and 100 ppm, respectively, whereas when the deodorant was used, it was 1 ppm or less in each case.

Example 35 10 g of the deodorant prepared in Example 28 was packed in a paper bag,
It was fixed to the back side of the lid of a poly bucket with an internal volume of 30 containing garbage. As a result, the smell of food waste disappeared, and the effect did not change even after 3 months.

Example 36 20 g of the deodorant prepared in Example 29 was packed in a paper bag,
When placed in the refrigerator, a deodorizing effect was recognized, and the effect did not change even after 3 months.

Example 37 100m of 50% aqueous solution of hypophosphorous acid and 100m of 30% aqueous solution of hydrogen peroxide were mixed and mixed with 200m of deionized water.
Was added to obtain a liquid deodorant.

The same experiment was performed by spraying 20 m of the liquid deodorant obtained in place of 2 g of the deodorant in Example 33. As a result, the concentrations of hydrogen sulfide and methyl mercaptan after 24 hours were each 5 ppm or less.

(Effects of the Invention) The deodorant of the present invention rapidly decomposes malodorous components. In addition, it can be used for a long period of time, and it can treat an extremely high concentration of malodor, and can be widely used as a deodorant.

Claims (1)

[Claims] 1. At least one selected from phosphoric acid, phosphorous acid and hypophosphorous acid, and calcium peroxide, sodium peroxide, potassium peroxide, sodium perborate, sodium percarbonate, potassium persulfate, and peroxide. At least one selected from the group of hydrogen and / or iron, cobalt, nickel, titanium, zirconium, vanadium, chromium, molybdenum, tungsten, manganese, copper, silver, zinc, germanium, tin, lead, magnesium, strontium A deodorant comprising at least one oxide of a selected element.