JPS63130136A - Deodorant - Google Patents

Abstract

PURPOSE:To improve deodorizing capacity and to extend life, by preparing a deodorant by containing one or more kinds of salts selected from chlorate and chlorite, and one or more kinds of elements selected from iron, cobalt, nickel and the like. CONSTITUTION:One or more kinds of compounds selected from chlorate and chlorite, and one or more kinds of elements selected from iron, cobalt, nickel, titanium, zirconium, vanadium, chromium, molybdenum, tungsten, manganese, copper, silver, zinc, bismuth, tin, lead, platinum and palladium are used as deodorizing components and supported by a porous carrier to form a deodorant. As the carrier, silica, alumina, silica-alumina, synthetic zeolite or the like can be used. In using as a deodorant, for example, said deodorant is molded in a granular or pellet-like shape to fill an air permeable bag or container and can be used in a refrigerator or toilet.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a deodorizing agent that adsorbs and decomposes malodorous components, and is used in kitchen garbage, refrigerators, toilets, hospitals, hotels, livestock farms, sewage treatment plants, and others. It can be widely used for deodorizing.

(Prior Art) There are many sources of bad odors, ranging from food waste, refrigerators, toilets, etc. in daily life to general production factories, livestock farms, sewage treatment plants, etc. Substances that cause these bad odors include ammonia, mercaptans, sulfides,
Although amines, acetaldehyde, etc. are attracting attention, in reality they are more complex and are not limited to these substances. In recent years, as the demand for technology to remove these bad odors has increased, research into technology for removing bad odors has become active, and various methods have been proposed, such as the following.

(1) A masking method that eliminates the odor by emitting an aromatic substance that is stronger than the odor. (2) An adsorption method that uses activated carbon or other adsorbent to adsorb the odor-causing substance. (3) A method that uses activated carbon or other adsorbents to adsorb the odor-causing substance. Acid/alkali neutralization method that removes by neutralizing with alkali (4) Chemical oxidation-reduction method that chemically decomposes malodor-causing substances (Problems to be solved by the invention) However, each of the above-mentioned methods has Significant shortcomings exist. For example, the masking method cannot be said to be an essential method. The adsorption method has a limited amount of adsorption due to the saturated adsorption amount, and cannot deal with strong odors. Acid and alkali neutralization methods are limited to substances that can be neutralized, and the odors that can be applied are limited. Chemical decomposition methods are considered to be the most promising technology, but so far none have been found to have sufficient capabilities. Among them, several methods have been proposed that utilize the oxidizing power of chlorine dioxide gas. For example,
No. 8-32079 discloses a method of stabilizing an aqueous chlorite solution by adsorbing it onto a basic adsorbent, and mixing this with a 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, with methods that generate chlorine dioxide gas, it is difficult to control the amount of chlorine dioxide gas generated, and it decomposes even when unused and stored, and furthermore, once all the chlorite has decomposed, the effectiveness disappears. Further, depending on the place of use, generation of chlorine dioxide gas may be undesirable.

Although each of the above-mentioned methods shows a certain degree of deodorizing effect and is actually applied, technical improvements are strongly desired due to the above-mentioned drawbacks.

It is an object of the present invention to provide a versatile, powerful and long-lasting deodorizer that overcomes the drawbacks of conventional methods.

(Means for solving the problem) With this background in mind, the inventors of the present invention have developed a system that absorbs various odors, ranging from the odors of kitchen garbage, refrigerators, and toilets to the odors of livestock farms, garbage disposal plants, sewage treatment plants, etc. As a result of studying deodorizing agents that are generally active and decompose, we found that compositions in which certain metals, metal oxides, metal salts, etc. are added to chlorate and/or chlorite generate chlorine dioxide gas in the gas phase. We have discovered that it is a stable and highly active deodorizing agent that has a high ability to decompose malodorous components without causing any damage, and has completed the present invention.

That is, the present invention combines at least one compound selected from chlorates and chlorites with iron, cobalt, nickel, titanium, zirconium, vanadium, chromium, molybdenum, tungsten, manganese, copper, silver, zinc, and germanium. , tin, lead, platinum, and palladium, and is characterized by the fact that almost no chlorine dioxide is generated during use. Moreover, another feature is that its effectiveness does not change even after long-term use or storage.

The present invention will be explained in detail below.

The chlorate and chlorite of the present invention are chloric acid (HCl03
), salts of chlorous acid (Hc102), such as potassium chlorate, sodium chlorate, calcium chlorate, barium chlorate, potassium chlorite, sodium chlorite, calcium chlorite, etc. . Iron, cobalt, nickel, titanium, zirconium, vanadium, chromium, molybdenum, tungsten, manganese,
The elements copper, silver, zinc, germanium, tin, lead, platinum, and palladium can be contained in any form such as metal, oxide, or salt, but the preferred form is that platinum and palladium are contained in metal or oxide, Others are oxides,
Examples include carbonates and sulfates. These elements can be used in any ratio, and it is preferable to use these metals or their compounds in a range of 1+0.01 to 99 (weight ratio) to chlorate and/or chlorite. .

The deodorizing agent of the present invention can be supported on a commonly used porous carrier. Preferred carriers include, but are not limited to, silica, alumina, silica alumina, natural zeolite, synthetic zeolite, diatomaceous earth, clay minerals, Kanuma earth, and activated carbon.

The raw materials and preparation method for the deodorizer of the present invention are not particularly limited. As the chlorate and chlorite, commonly available ones can be used. Iron, cobalt, nickel, titanium, zirconium, vanadium, chromium, molybdenum, tungsten, manganese, copper, silver, zinc, germanium, tin, lead,
The metals, oxides, salts, etc. of platinum and palladium are commonly available as reagents, either as they are or as a mixture.

For example, oxides can be made from nitrates, hydroxides, etc., which become oxides by ignition. If necessary, these can be simultaneously prepared or mixed with a carrier component and then mixed with chlorate and/or chlorite by mechanical mixing, impregnation, etc. to form a deodorizing composition. can.

The method of using the deodorizer of the present invention is not particularly limited. For example, it can be formed into granules or pellets and filled into breathable bags, containers, etc. for use in refrigerators, toilets, etc. Alternatively, it is also possible to forcibly pass the malodorous gas through the layer of the deodorizing agent of the present invention. It can also be applied to or mixed with packaging materials, wallpaper, and other housing materials. Furthermore, it is also possible to add directly to wastewater, which is a source of bad odors.

The deodorizing agent of the present invention deodorizes ammonia, mercaptans, various sulfides, amines, and other malodorous components by adsorbing and decomposing them. The deodorizing mechanism of the deodorizer of the present invention is not clear, but since chlorine dioxide gas is not observed in the gas phase, it is more likely to be due to the oxidizing effect of chlorine dioxide generated by decomposition of chlorate or chlorite. It is thought that the main cause is catalytic action.

Therefore, unlike adsorbents and chlorine dioxide generators, it can be used for a long period of time. In addition, because it is highly active, it has the advantage of being effective against strong odors in a short period of time.

(Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited by these Examples.

Example 1 25 g of sodium chlorite, 25 g of iron sesquioxide and 50 g of granular silica alumina (alumina content 28 wt%)
Knead in the presence of a small amount of water to mix uniformly, and heat at 110°C.
After drying, the obtained solid was pulverized into 16 to 24 meshes to obtain a deodorizer.

1 g of the obtained deodorizing agent was sealed in a polyethylene container together with 500 ml of a test gas containing 1000 ppm of methyl mercaptan, 500 ppm of hydrogen sulfide, and 1000 ppm of ammonia, and the change in concentration of each was measured. The results are shown in Table 1.

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

Examples 12 to 22 In the same manner as in Example 1, a deodorizing agent having the composition shown in the second coating was obtained. The deodorizing effect of each was investigated in the same manner as in Example 1. The results are shown in the second panel.

Example 23 20 g of sodium chlorite, 20 g of iron sesquioxide, 10 g of zinc oxide and granular silica alumina (alumina content 28
wt%) in the presence of a small amount of water to mix uniformly and dry at 110°C.
A deodorizing agent was obtained by grinding into ~24 mesh pieces.

The deodorizing effect of the obtained deodorizer was examined in the same manner as in Example 1. The results are shown in the third column.

Examples 24 to 26 In the same manner as in Example 23, a deodorizing agent having the composition shown in the third coating was obtained. The deodorizing effect of each was investigated in the same manner as in Example 1. The results are shown in the third column.

Example 2 100g of 7° alumina powder was suspended in 200ml of water,
To this was added an aqueous solution in which 0.265 g of chloroplatinic acid was dissolved in 100 fflJ of water. This was evaporated to dryness while stirring, and the obtained solid was air-calcined at 450°C for 3 hours, and further hydrogen reduced at 300°C for 2 hours to give a concentration of 0.1 wt%.
Pt/alumina was obtained. In this, sodium chlorite 25
A deodorizer was obtained by impregnating and supporting wt%.

The deodorizing effect of the obtained deodorizer was investigated in the same manner as in Example 1. The results are shown in the fourth column.

Example 28 In Example 27, chloroplatinic acid was changed to palladium chloride,
The experiment was conducted in the same way except that activated carbon was used instead of alumina.

The results are shown in the fourth column.

Example 29゜10 g of the deodorizer prepared in Example 23 was placed in a paper bag,
They were installed in three separate locations in a 15m2 public toilet. As a result, the so-called toilet odor disappears, and the effect is 1.
It didn't change even after months passed.

Example 30゜1 og of the deodorizer prepared in Example 23 was banked in a paper bag,
It was fixed to the back of the lid of a plastic bucket containing fft30A of food waste. As a result, the garbage odor disappeared, and the effect remained unchanged even after one month had passed.

Example 31 In Examples 1 to 3.8 to 22, almost the same deodorizing effect was obtained even when sodium chlorate was used instead of sodium chlorite.

(Effects of the Invention) The deodorizing agent of the present invention rapidly adsorbs and decomposes malodorous components. Moreover, it can be used for a long period of time, and can treat even extremely high concentrations of bad odors, so it can be widely used as a deodorizing agent.

Claims (1)

[Claims] At least one compound selected from chlorates and chlorites and iron, cobalt, nickel, titanium, zirconium, vanadium, chromium, molybdenum, tungsten, manganese, copper, silver, zinc, germanium, tin, lead, A deodorizer characterized by containing at least one element selected from platinum and palladium.