JPH0739749A - Air cleaning agent to be put in space and air cleaning method - Google Patents

Abstract

PURPOSE:To provide a solid air cleaning agent which can cleans air while utilizing humidity of the air only by setting the agent in space whose capacity is limited and which is polluted with various kinds of pollutant gases with different chemical properties such as acidic, basic, or neutral properties and to provide a method to use the agent. CONSTITUTION:A composition comprising (A) calcium carbonate, sodium di carbonate, or the like, (B) citric acid, succinic acid, or the like, (C) sodium sulfate, sodium salt of oxyacid of phosphorus, or the like, and (D) a water absorbable polymer compound as essential components is put in an air-permeable container or bag and set in space, wherein any components are anhydrous salts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to various harmful odors, gases, mists, aerosols, fumes, etc. which have a bad effect on health, sensation and psychology (hereinafter, these are collectively referred to as polluted gases). However, it may be generated, inflowed, or enclosed, or have a low ventilation rate and a damp space, such as a cabin, living room, room with livestock, hospital rooms, toilets, refrigerators, freezers, various physics and chemistry laboratories, and the inside of automobiles. , Containers, warehouses, dissection rooms, funeral homes, uncontrolled underground wastewater storage tanks,
Narrow space close to sources of malodor such as various factories, rooms filled with cigarette smoke, etc. (hereinafter collectively referred to as narrow malodorous space), places where various lives, work, storage, transportation, etc. are performed. So, by simply installing it in that space, you can selectively and rapidly absorb and reduce pollutant gas, and other than a small amount of carbon dioxide gas, secondary air and pollutants to the environment are not generated, Novel solid air cleaning, essentially fragrance-free, in the form of powders, granules, moldings, breathable bags and containers, which have the advantages of long-lasting effect and easy disposal Provide the agent.

[0002]

BACKGROUND OF THE INVENTION A typical solid air freshener used for the same purposes of the present invention is activated carbon. The reason why this is effective is that the fine pores adsorb the pollutant gas well, and for example, it is the mainstream of the deodorant to be installed in a space in a refrigerator or a toilet. This advantage is that (a) it often adsorbs pollutant gases of low polarity, such as hydrocarbons, but its disadvantages are (b) that it has a low ability to adsorb polar gases such as ammonia and trimethylamine, At a high temperature of 40 ° C or higher, the pollutant gas once adsorbed is re-released, (d) the adsorption efficiency of the pollutant gas at a low concentration of 1 ppm or less is low, and (e) the pollutant gas adsorption capacity is high under high humidity. It is pointed out that it is low. In order to improve this, surface treatment with a drug such as a complex of a ferrous salt and ascorbic acid improves the defects (b) and (d), but
There was a drawback that the performance of (a) deteriorated.

Further, there have been deodorants such as gelled by mixing various fragrances and chemicals with an aqueous solution of a coagulating polymer compound such as agar. Under the use conditions such as the inside of a car, there is a drawback that it quickly solidifies. Moreover, it has not been clearly proved that the fragrance itself has a deodorizing effect.

[0004]

In order to solve the above-mentioned problems of the prior art, the present invention provides: a) For example, ammonia, hydrogen sulfide, sulfur oxides (SOx), nitrogen oxides (NOx), For polar air pollutant gases such as trimethylamine, for example, non-polar pollutant gases such as styrene, toluene, dimethyl sulfide, oil smoke, etc., as well as cigarette smoke, many kinds of acidic, basic, medium It has a high cleaning potency against any of the extremely complicated pollutant gases mixed with organic substances. (B) It is troublesome to operate and maintain like a deodorant spray method or a simple porous adsorption method. It does not take a long time, but it is installed in a narrow odor space and exerts a continuous air cleaning effect just by touching the air. C) Once polluted gas that has been chemically fixed or non-volatile,
It does not release at high temperature, and d) Before use, it can be maintained semipermanently if it is placed in a sealed container that does not come into contact with moisture or completely wrapped in an impermeable film. E) Even in a closed car that gets hot in the summer or in a freezer below freezing, the air can be purified by releasing a small amount of carbon dioxide gas with a slight amount of moisture, and f) pollutant gas becomes hydrophilic. It can be quickly cleaned with either water or hydrophobic properties. (G) The humidity of the cleaning reaction initiator in the air is large in the form of water of crystallization in the desiccant, anhydrous inorganic salt or salt formed. Although it is taken in, the drug remains a breathable solid state without solidifying or liquefying, and even after the water content is exceeded beyond that limit, the water-absorbing polymer compound absorbs a large amount of water, and for a long time, Even when installed at high temperature, it can coexist with moisture and is an inorganic salt. Liquefaction due to melting of crystal water and slurry can be prevented. H) Fine adjustment of the formulation can determine the optimal formulation for each application. Re) During production, dust that is harmful to workers' safety and hygiene is generated. There is almost no such thing as the corrosion of the garbage incinerator and its smoke emission, the ash disposal and the water pollution due to its exudates, even after the use.
It is intended to provide a novel solid air cleaning agent having many advantages such as not causing harmful pollution to land-filled soil, groundwater and seawater.

[0005]

According to the present invention, (1) any of (A) alkali metal and / or calcium carbonate, which has low toxicity, is powdery and dried, and preferably is completely anhydrous, At least one selected from bicarbonate, magnesium carbonate, and basic carbonate, and (B) citric acid, lactic acid,
DL malic acid, succinic acid, fumaric acid, glucono delta lactone, and / or at least one selected from acidic salts thereof, and (C) sulfuric acid, pyrophosphoric acid, acidic pyrophosphoric acid, tripolyphosphoric acid, hexametaphosphorus A mixture of an acid sodium salt and (D) a water-absorbing polymer compound as an essential component, and / or (2) or a surfactant, which is a part of the blending component of (1), particularly A solid air purifying agent, characterized in that either (A) the component or one that has been pretreated in advance is placed in a space, and further, (3) activated carbon, and And / or an air purification method characterized in that the solid air cleaning agent according to item (1) or (2) is installed in a space in close proximity.

[0006]

The present inventor has already disclosed in Japanese Laid-Open Patent Publication No. 3-215.
267 (hereinafter referred to as “existing”), a formulation similar to that of the present invention, that is, in addition to the above-mentioned (A) to (C), a salt of a peroxide and a binding agent for molding necessary for tableting. A solid deodorant with added agent was proposed. The existing invention is an extremely large amount of various types of air pollutants, such as basic, acidic, reducing, and polymerizable, contained in wastewater storage tanks, activated sludge, or wastewater of various plants. Put it in water-based waste,
Alternatively, it is a method of spraying it on the surface of a moist solid malodorous substance such as stool and dehydrated activated sludge to quickly cut off the deodorant source.

Although the present invention is similar to the prior application in the prescription, there is a big difference in the purpose and the method of use between the two, and the prescription is devised so as to cope with this difference. The previous application aimed to directly administer a drug to a large amount of an aqueous malodorous source and deodorize it by an instantaneous chemical reaction. However, in the present invention, the complex pollution of air of a relatively low concentration in a narrow space. The purpose is to continuously purify the gas by utilizing the humidity in the air.

A) When stored in a container that does not come into contact with water or air containing moisture, the solid air cleaning agent of the present invention is
Can be stored stably forever. At the start of use, it may be devised to be exposed to air by a known method.

(B) Upon contact with a slight amount of moisture in the air, a highly volatile polar pollutant gas is rapidly fixed as a non-volatile salt with a high reaction rate by a neutralization and metathesis reaction. After that, dry, non-polar pollutant gas that can't be removed yet
Activated charcoal absorbs or is treated with a surfactant to be trapped by an affinity-imparted solid air purifier and chemically fixed to clean the air. Ozone, which is very bad for your health, can be removed well with this.

(C) Carbon dioxide gas generated upon contact with humidity quickly deodorizes various volatile and basic air pollutant gases. Excessive carbon dioxide gas goes out of the system.

D) If the essential water-absorbing polymer compound is not added, the solid air purifying agent will rapidly dry up in the presence of humidity, so that the solid air purifying agent will be dried due to condensation of moisture in the air. When the agent is anhydrous sodium sulfate or dibasic sodium phosphate, the surface layer thereof rapidly takes in a large amount of water of crystallization as described below. If it absorbs more water than this and reaches around 40 ° C, it will dissolve in its own water of crystallization, and these water will condense from the surface layer of the solid air purifier, so it cannot be used for a long time. . But,
Since the water-absorbing polymer compound is added, the water-absorption water and the desiccant or the water of crystallization of the salt produced in the cleaning reaction compete with each other, and solidification or tackification does not occur for a long time. . However, when a water-soluble polymer compound such as polyacrylamide or polyvinyl alcohol is added, only the surface becomes a sticky paste and the effect is rapidly reduced.

(E) As described above, as the desiccant, the inorganic salts used in the present invention include those which form a large amount of water of crystallization as described below and which are acidic, basic or reducing. Therefore, it is suitable for specific applications and is also useful for reducing the weight of products.

The compounds listed in (A) above have an excellent immobilizing effect on hydrogen sulfide, alkyl mercaptans, malodorous acids, SOx, NOx, etc. However, when they are used alone, the reaction rate is poor. However, in the coexistence of water and the acids mentioned in (B), since they are once ionized, they easily react.

In this case, all or a part of the compounding ingredients, especially the calcium compounds in (A) having a low solubility in water in the above-mentioned compounding ingredients are treated with a surfactant by an aqueous solution spraying method or the like. If treated in advance, hydrogen sulfide, NOx
The affinity of the hydrophobic, complex, multi-component pollutant gas, etc., for the air cleaning agent is greatly improved, and the removal rate is greatly improved. Soaps and some anionic activators that are invalidated or salted out by acidity are not suitable, but nonionic activators with good permeability and reverse soaps that also have bactericidal properties are suitable for this treatment. ing. The amount of the surfactant used is effective, for example, about 0.1% or 0.01% of the total amount.

The citric acid (B) used in the present invention,
A solid acidic compound selected from lactic acid, DL malic acid, succinic acid, fumaric acid, glucono delta lactone, and alkali metal primary sulphate is effective in neutralizing basic malodorous substances such as ammonia and trimethylamine. Japanese deodorant. Here, the carbon dioxide gas generated by the reaction of the above (A) and (B) immediately deodorizes the basic malodor, but when the system becomes acidic due to the reaction with another acid, the carbon dioxide gas is changed. Driven out, the stronger acid makes it a stable salt, which undergoes a further metathesis reaction with other polluting gases and absorbs large amounts of basic and acidic air polluting gases. For example, when 3 mol of calcium carbonate and 2 mol of citric acid anhydrous salt (weight ratio of 1 / 1.28) are mixed, if moisture is absorbed until saturation, 1 mol of calcium citrate,
Generates 3 mol of carbon dioxide gas. Since this carbon dioxide gas is scattered in the air, theoretically, an immediate deodorizing effect can be obtained with respect to equimolar ammonia and trimethylamine, but in reality, since the carbonate produced is metathesized, Even if this effect is ignored, the theoretically produced calcium citrate is 3 mol of hydrogen sulfide, 6 mol of each of ammonia, trimethylamine, methylmercaptanic acid, valeric acid, propionic acid, and the like. Total pollutant gas is 1
It can be deodorized by fixing 2 equivalents. Ie 1 g of this mixture
In the normal state, in the case of mixed pollutant gas of monoacid base and / or monobasic acid, maximum 392 ml, or 1
The air containing ppm of pollutant gas has a deodorizing ability of 392 m ³ minutes, and can be said to be a very efficient solid air cleaning agent.

Alkali metal persulfates, caroates, calcium peroxide and the like are not essential components in the present invention, unlike the previous application. These peroxides are
The purpose was to deodorize the reducing malodor by oxidation and depolymerization by the polymerization of styrene and other unsaturated ethylene compounds.However, in the present application, the problem can be solved by the combined use with activated carbon, and the extreme reactivity and toxicity. I excluded it because there is.

In the present invention, it is preferable to use sodium sulfate, which has the least environmental load among the salts (C). Other salts have a deodorizing effect by themselves, and can be used for specific purposes and for weight reduction. Of course, preferably anhydrous is used. Due to the absorption of moisture in the installation space, these are taken up little by little in the form of crystal water and the surface is solidified. Mixing a lubricant is very effective in preventing this. In particular, oily dimethylsiloxane, such as Shin-Etsu Chemical Co., Ltd. product, Shin-Etsu Silicon KF-96-10,
When it is mixed at about 0.5%, the fluidity at the time of mixing at the time of manufacture and at the time of taking out is improved. In addition, use of anhydrous calcium stearate or paraffins was also effective.

The lubricant alone is not sufficient for the solid air purifying agent of the present invention to prevent the partial or total liquefaction that is unavoidable at the final stage of water adsorption, and as a result of various studies, By mixing the water-absorbing polymer compound of D),
It could be effectively prevented. Currently on the market,
Starch, polyacrylamide, sodium alginate, polyvinyl alcohol, etc. as the skeleton, if this is used as a graft polymer type or an intramolecular self-crosslinking type, completely different from the case of using a water-soluble polymer compound, It was effective in preventing caking without causing tackiness. However, products having starch or polyacrylamide as a skeleton tend to be easily attacked by microorganisms and enzymes, and due to the influence of inorganic ions, tend to be synergic after a certain period of time.
For example, (a) a saponified product of a copolymer of vinyl acetate and maleic anhydride manufactured by Nippon Gosei Co., Ltd., which is self-crosslinked by esterifying OH groups and COOH groups in the molecule (trade name: AQUA Reserve GP), (b) Kuraray isobutylene chemical Co., Ltd. product, crosslinked isobutylene-maleic anhydride copolymer (trade name: KI gel), (C) Sumitomo Chemical Co., Ltd. product, ethylene oxide Polymer, (trade name: Sumikagel R), etc. show little decrease in water absorption amount due to inorganic ions and show a solidification preventing effect due to a high degree of water absorption. When these are mixed in an amount of about 5% to 10%, an inorganic salt crystal is already formed. Even when the water intake amount reached the maximum value was heated at 100 ° C. or higher, liquefaction and slurry could be effectively prevented.

Typical mixing ratios of the air freshener of the present invention are, for example, the following examples. Here, the categories A to D represent the respective essential compounding components described in the claims, and e to f represent the components which are preferably used although they are not essential compounding components. (Category) (Substance name and its shape, total treatment method) (Parts by weight) A Light or ground calcium carbonate powder 10.0 A Sodium bicarbonate fine powder 25.0 B Citric acid (anhydrous salt) 26.9 C anhydrous sodium sulfate 27.5 D water-absorbing polymer compound 10.0 e nonionic activator 0.1 f silicone oil 0.5

In the above formulation example, the ratio of citric acid binding to calcium groups and sodium groups is equivalent,
The formulation may be changed according to the purpose of use. Unlike the case of the solution, even if the mixing ratio of the acid group / basic group is changed, the method of contacting with air does not require a blower to constantly blow the pollutant gas, and the acid group / basic group Both acidic and basic polluting gases can be cleaned simultaneously until either of the groups is consumed. In this composition, when moisture coexists, calcium groups and sodium groups are generated in hydrogen sulfide, mercaptanic acids, propionic acid, valeric acid, isovaleric acid, NOx, SOx, and other laboratories and working rooms. It is possible to deodorize various harmful acidic pollutant gases by forming a non-volatile salt by a metathesis reaction.
In addition, citric acid group, ammonia, trimethylamine,
It can also eliminate other basic malodors at the same time. Further, the mechanism of this formulation is unknown, but the aerosols of cigarette smoke, which are very complicated and consist of many kinds of compounds, and the smoke odor of cigarettes soaked in the interior of automobiles, etc. are simply installed in the vehicle. It can be easily removed by just

[0021] This composition can effectively clean the acidic and basic pollutant gases even after the moisture is taken in and saturated with water, but the adsorption of hydrocarbons such as styrene odor and gasoline odor. If the force is limited even with the above surfactant treatment, activated carbon is further added to this formulation in an amount of 10 to 1
It is very effective if it is mixed at about 00%. However, if the composition becomes damp due to humidity, the performance will deteriorate.In this case, place the composition and activated carbon in separate air-permeable containers or non-woven fabric bags and keep them intimate contact. If the two are preferably separated from each other by a breathable net and installed in a narrow space and exposed to air, the polluted gas can be efficiently cleaned for an extremely long period of time.

As described above, in the prior application, a large amount of a high concentration (for example, at least several hundred ppm by volume) is obtained by a method in which an aqueous waste material or a composition is directly added to the waste water by a scoop or sprayed. , Sometimes thousands of pp
The purpose was to clean the polluted gas of m) all at once, but in the present invention, a relatively low concentration of 1 pp in a narrow space is used.
The purpose is to continuously purify a pollutant gas having a humidity of m or less to several tens of ppm by contact with or passing through a solid air purifying agent contained in a container or bag. As shown in the following examples, the effect can be easily proved by chemical analysis, but in chemical analysis, the cleaning of pollutant gas in which extremely low concentrations of various substances are complexed so that the concentration cannot be easily measured As an example that is believed to be effective also in caring for, if you ride a car for a long distance and always get a car sickness, only if you get in a car with this compound installed,
The fact that more than ten cases do not cause car sickness has been reported.

[0023]

Example 1 (a) 50 g of fine powder of light calcium carbonate, nonionic activator of Kao Co., Ltd., solid form of Emulgen PP-150, an oxyethylene / oxypropylene block polymer having a molecular weight of about 2,000. 5 g of 5% aqueous solution in terms of minutes
Was evenly sprayed, thoroughly stirred and dried at room temperature, (b) 300 g of sodium bicarbonate,
(C) 290 g of citric anhydride, (d) 90 g of the water-absorbing polymer compound Sumikagel R, (e) 3 g of the above-mentioned silicone KF-96-10 well mixed with 270 g of anhydrous sodium sulfate, The mixture was mixed well to prevent unevenness and used as a solid air cleaning agent. After precisely weighing 40 g of this, it was placed in a breathable, heat-fusible, non-woven fabric bag, heated and sealed, and placed in a plastic bag with an open lid. They installed them under their own seats and asked them to drive while smoking normally for 8 months from the beginning of August until the end of March of the following year.
After that, the panel of 6 non-smokers was asked to enter the car and examine the deodorizing effect. The results are as follows. Here, the term "weak" means an odor that can be barely perceived when the engine is started and when the heating is turned on, and none of the six non-smokers felt uncomfortable. Then, during the test period of 8 months, the solid cleaning agent maintained a fluid powdery state without stickiness, and the average weight increase rate was within the range of 5 ± 2%.

[0024]

[Example 2-9] and

[Reference Example 1-8] These examples and reference examples are shown in FIG.
Will be described with reference to. First, the intake / exhaust capacity is about 150 on the following pollutant gas or bottle in which pollutant gas is being generated.
For an air pump made of corrosion-resistant material at 0 ml / min,
Vented connector with an outer diameter of 8 mm so that gas does not leak into a polyester bag that is made by depositing aluminum with a capacity of 30 l to improve airtightness while holding a funnel connected with a silicone rubber pipe and appropriately mixing air The diluted gas was sucked and filled into the flexible bag for gas sampling made by Omi Odo Air Service Co., Ltd., which was installed as a pollutant gas source. Apart from this, JIS R35
On the partition (I) of the desiccator (A) with a plug having a body radius of 03 of 180 mm, the bag-containing air purifier (L) of Example 1 was placed, and two plugs (C) made of silicone rubber were placed. glass tube with an external diameter of 8mm and _{(D 1} and _{D 2)} inserted in, _{D 2}
Cover the inside with a silicone rubber tube (E ₁ ) with an inner diameter of 8 mm,
Via the three-way cock (K), the connector (H
₂ ) inserted. Further, D ₁ is covered with the same silicone rubber tube E ₁ and is connected to the above air pump (B) coated with a fluorine-based anticorrosive paint, and this bag is passed through this and the cock (F). Connected to the connector (H ₁ ) on the upper left. Furthermore, cover the same rubber tube (H ₂ ) at the outlet of the three-way cock K, and from there, send the following pollutant gas into the desiccator by adjusting the opening and closing of the cock, or attach the gas detection tube manufactured by Komei Rikagaku Co., Ltd. By inserting a gas detector, it was possible to analyze the gas concentration at a specified time.

Next, after G is filled with each pollutant gas, F and K are opened, the intake and exhaust pumps are driven to circulate each pollutant gas, and the pollutant gas concentration (pp
The change with time in m) was measured and the following results were obtained. Here, all the reference examples are the measured values when the bag of the air cleaning agent was not put in the desiccator.

[0026]

[Examples 10 to 9] and

[Reference Example 9-8] 200 m on the bottom of a desiccator with a stopper
1 l of water, put the bag-containing air purifier of Example 1 in a beaker on the partition, and put a filter paper on the beaker to prevent the condensed water from directly falling there. When the powder was covered and left at 20 ° C. ± 2 ° C. for 60 days and then observed, a weight increase of about 38% was measured in the powder portion, but no syneresis or solidification was observed. And
An air cleaning test was conducted by the same method as in Example 2-9, but no deterioration in performance was observed as described below.

[0027]

Example 14 In the formulation of Example 1, 40 g of the air cleaner of the formulation (Example 14) in which succinic acid was used instead of citric acid, Formulation 20 of Example 14 and coconut shell activated carbon 20 g and a formulation mixed with 20 g (Example 15) are separately placed in the same non-woven fabric bag, and 20 g of the formulation of Example 1 and 20 g of chaff activated carbon are separately placed in the same non-woven fabric. Example 16) in Examples 2-9
An air purification test was conducted by the same method as in the above, and the following results were obtained.

[0028]

Example 17 In a refrigerator, about 1 kg of squid, 1 kg of mackerel fillet, about 1 kg of pork, and about 0.
5 kg, kimchi about 1 kg, each packed or unpacked, left for 5 days at about 5 ℃, mixed with unpleasant food odor in the refrigerator, 200ml capacity flat bottom plastic container, 60g of powder of the following prescription,
When placed and installed in the back of the refrigerator, a remarkable deodorizing effect was observed by the panel of 6 persons, and the odor intensity decreased from 5.6 to 3.1. A Light calcium carbonate powder 10.0 A Sodium bicarbonate fine powder 25.0 B Citric acid (anhydrous salt) 26.9 C Anhydrous sodium sulfate 27.5 D Water-absorbing polymer compound 10.0 e Cationic activator (Kao Corporation Company product-Sanisol C) 0.1 f Silicon oil 0.5

[0029]

Since the present invention is constructed as described above, it has the following effects. At present, air pollution is becoming more serious on an international scale due to the concentration of the population in cities, the development of various industries and transportation means, the depletion of forest resources on a global scale, and volcanic explosions. , SOx, NOx, hydrocarbons, ozone,
They are forced to continue breathing various other pollutant gases. Not only the elderly, infants, and sick persons, but also all consumers and workers are adversely affected in health and psychology by polluted gas from the air. In order to solve these problems fundamentally, it is necessary to modify these large sources of endogenous pollutant gas, but here, it is necessary to modify the local area of a limited volume of space. A very easy-to-implement method for cleaning air pollutant gases was proposed. INDUSTRIAL APPLICABILITY The air cleaner and the method of using the same of the present invention are effective for most gases such as acidic, basic, neutral, polar and non-polar, and air pollutant gases such as mist, fumes and aerosols. The present invention is limited to a limited volume of buildings, offices, physics and chemistry laboratories, hospital rooms, refrigerators, cars, bedrooms, airplanes, etc., which are slightly damp and have a harmful and unpleasant odor. The present invention relates to a high-performance and novel air cleaning agent which is installed and used in a space with a low ventilation rate where it easily stays, and a method therefor. This composition is odorless and fragrance-free, can be used by simply opening and setting it, has a particularly long-lasting effect, requires no maintenance, has almost no toxicity, and can be manufactured using only food additives. The energy consumption for disposal and disposal is also extremely low, and only a small amount of carbon dioxide gas is released to the environment, and even in a small amount,
It has the advantage of having a very high air cleaning potency, occupying a much smaller volume in use than other methods and prescriptions, and can be kept indefinitely when stored aside from moisture. The solid cleaning agent of the present invention, the moisture in the air starts the reaction, but if it completely absorbs the moisture and, even after the neutralization reaction of the main component is completed, when it comes into contact with hydrogen sulfide, further, For example, it becomes calcium sulfide or sodium sulfide, etc., and eventually changes to calcium sulfate etc. by incineration,
Since other used raw materials are also incinerated to be mineralized, it is believed that a highly safe air cleaning method has been completed here.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of an analyzer for an air cleaning test.

[Explanation of symbols]

A desiccator with plug B intake / exhaust pump C plug made of silicone rubber D ₁ glass pipe D ₂ glass pipe E ₁ silicone rubber pipe E ₂ silicone rubber pipe F cock G flexible bag for gas filling H ₁ connector H ₂ connector I partition Table J Humidity control water or inorganic salt solution K Three-way cock L Air cleaner

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[Procedure amendment]

[Submission date] July 27, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

Means for Solving the Problems The present invention includes (1)
Low toxicity, and dried in powder form, preferably, all anhydride, (A) an alkali metal, and / or Ca carbonate calcium, bicarbonate, hydroxide, magnesium, and / or
At least one selected from zinc carbonate, acidic carbonate , oxide, and hydroxide , and (B) citric acid, lactic acid, DL malic acid, succinic acid, fumaric acid, tartaric acid , gluconodeltalactone, and / or or at least one selected from these acid salts, at least one selected from (C) sulfuric acid, pyrophosphoric acid, acidic pyrophosphoric acid, tripolyphosphate, sodium salt of hexametaphosphate phosphate, (D) water-absorbent A mixture of a high molecular compound as an essential component and / or (2) or a surfactant is pretreated with a part of the component (1), particularly the component (A), or all of them. A solid air purifying agent, characterized in that any of the above is installed in a space, and (3) activated carbon is admixed and / or brought into close proximity, (2)
The solid air purifying agent according to the item (1) is installed in a space, and an air purifying method.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

In this case, all or some of the compounding ingredients, especially the one having a low solubility in water (A) in the above compounding ingredients,
If the compounds of calcium, magnesium, and zinc in the above are treated with a surfactant in advance by an aqueous solution spraying method, etc., hydrophobic, complex, multi-component pollutant gases such as hydrogen sulfide and NOx will be generated. It has a very good affinity for air fresheners and a very high removal rate. Soaps and some anionic activators that are invalidated or salted out by acidity are not suitable, but nonionic activators with good permeability and reverse soaps that also have bactericidal properties are suitable for this treatment. ing. The amount of the surfactant used is, for example, 0.1% of the total amount, or 0.
Even about 01% is effective.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

[0015] also be used in the present invention, citric acid (B), lactic acid, DL malic acid, succinic acid, fumaric acid, tartaric
Solid, acidic compounds selected from acids , glucono delta lactones, and alkali metal primary sulfates promptly neutralize and deodorize basic malodorous substances such as ammonia and trimethylamine. Here, the carbon dioxide gas generated by the reaction of the above (A) and (B) immediately deodorizes the basic malodor, but when the system becomes acidic due to the reaction with another acid, the carbon dioxide gas is changed. Driven out, the stronger acid makes it a stable salt, which undergoes a further metathesis reaction with other polluting gases and absorbs large amounts of basic and acidic air polluting gases. For example, when 3 mol of calcium carbonate and 2 mol of citric acid anhydrous salt (1 / 1.28 in weight ratio) are mixed and moisture is absorbed until saturation, 1 mol of calcium citrate and carbon dioxide gas are absorbed. 3 mol. Since this carbon dioxide gas is scattered in the air, theoretically, an immediate deodorizing effect can be obtained with respect to equimolar ammonia and trimethylamine, but in reality, since the carbonate produced is metathesized, Even if this effect is ignored, the theoretically produced calcium citrate is 3 mol of hydrogen sulfide, 6 mol of each of ammonia, trimethylamine, methylmercaptanic acid, valeric acid, propionic acid, and the like. A total of 12 equivalents of polluting gas can be fixed and deodorized. That is, 1 g of this mixture is, in a normal state, a maximum of 39 in the case of a mixed pollutant gas of 1 acid base and / or 1 acid.
39 with air containing 2 ml or 1 ppm of pollutant gas
Since it has a deodorizing ability of 2 m ³ minutes, it can be said to be a very efficient solid air cleaner.

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Claims (3)

[Claims] 1. At least one selected from the group consisting of (A) alkali metal and / or calcium carbonate, bicarbonate, magnesium carbonate, and basic carbonate dried in powder form. , (B) citric acid, lactic acid, DL malic acid, succinic acid, fumaric acid, glucono delta lactone, and / or at least one selected from these acidic salts, and (C) sulfuric acid, pyrophosphoric acid, acidic pyro Phosphoric acid, tripolyphosphoric acid, sodium salt of hexametaphosphoric acid,
(D) A solid air purifying agent, characterized in that a mixture of a water-absorbing polymer compound as an essential component is installed in a space. 2. A surface-active agent, wherein a part or all of the compounding ingredients have been previously treated.
The solid air freshener described. 3. An air cleaning method, characterized in that the solid air cleaning agent according to claim 1 or 2 is installed in a space in admixture with and / or in close proximity to activated carbon.