JPS58122022A - Body and implement for absorbing harmful gas - Google Patents

Abstract

PURPOSE:To improve the effective rate of consumption of absorbing chemicals and the rate of absorption by depositing said chemicals in the internal spaces of porous materials without substantially closing said internal spaces. CONSTITUTION:Open-celled materials of organics such as urethane foam or inorganics such as calcined vermiculite are used, and acidic materials such as sulfamic acid, malic acid, or the like are used as absorbing chemicals in order to absorb alkaline gases and alkaline materials such as NaOH, K2CO3 or the like are used in order to absorb acidic gases. The liquid prepd. by dissolving or suspending the absorbing chemicals in water or a suitable solvent is impregnated into the open-celled materials which are then dried. The resultant open-celled materials deposited with the absorbing chemicals are packaged with films having fine holes which have gas permeability but prohibit the permeation of liquid at high density, whereby a harmful gas absorbing body is obtained. In the case of absorbing several kinds of harmful gases simultaneously, >=2 kinds of the harmful gas absorbing bodies differing in the adsorbing chemicals are combined and are contained in a perforated vessel.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, harmful gas absorbers have been used in which an adsorbent such as active fiber, humic acid, acidic aluminum tripolyphosphate, or zeolite is packaged in an air-permeable sheet.

These absorbers utilize the physical properties of adsorbents, but on the other hand, adsorbents such as hostile substances, alkaline substances, or low-molecular-weight f4!1JJX having reactive double bonds are used as adsorbents.

Attempts are also being made to chemically absorb harmful gases by using them.

The purpose of the present invention is to effectively perform this chemical absorption. In the absorber,
A harmful gas absorber characterized in that a harmful gas absorbing agent is supported within the internal space of a continuous porous material without substantially blocking the space.

(2) The harmful gas absorber according to Paragraph 1 of Claim i8, wherein the air permeable sheet is a sheet that is permeable to air but not permeable to liquids.

In addition, in order to use these harmful gas absorbers effectively, (3) the above (1) using different types of harmful gas absorbing agents
1.) A harmful gas absorbing device, characterized in that one or more of each of the harmful gas absorbers (tt211 or more) are housed in a perforated container.

(4) The harmful gas absorbing device according to the preceding item, wherein the gas-permeable sheet is permeable but impermeable to liquids.

(5) The noxious gas-containing odor described in items 3 and 4 above, in which an aromatic agent or activated carbon packaged in an air-permeable sheet is housed in a perforated container.

It is.

In the present invention, the continuous porous material supports the harmful gas absorbing agent in its narrow internal space, and the gas absorbing agent becomes a thin film in the continuous porous material. S surface [4j1 is overturned or extremely Ii
6, the internal space of the continuous porous material is not substantially blocked by the harmful gas-absorbing agent, and therefore it is It retains its inherent breathability. By adopting such a form III, the effective consumption rate of the harmful gas absorbing agent is significantly increased, and the absorption rate is also significantly improved.

Continuous porous materials used in the present invention include organic porous materials such as NJ urethane foam, corncob meal, bran, sawdust, pulp, bagasse, rice husks, and peanuts, or calcined vermiculite and calcined wood. Porous inorganic materials such as matrix light, silica gel, finely divided silica, ceramic filters, granular activated carbon, and slag can be used as gill nets, but are not limited to these. TeU ammonia,
For example, trimethyl eye/rolling which absorbs the charged alkaline gas includes: suru 7 ain ridge, sinic acid, nickel, lactic acid, tartaric acid, sulfuric acid, oxalic acid, acidic acidic acid, hostile phosphorus soda. It is possible to use similar acidic substances such as, but these are not the only ones that can be VC@. For hostile gases such as hydrogen sulfide and mercaptans, solid alkaline substances such as caustic soda, caustic potash, lithium hydroxide, soda carbonate, slaked lime, hexamethylenetetramine, etc. can be used. It is not limited to only. In addition, by using glyokypur, it is possible to absorb the odor of ammonia and methylamine that form adducts with aldehydes, and with maleic acid solution, it is possible to absorb odor-causing substances that add to the double bond of hydrogen sulfide.
Methylamine, ammonia, mercaptan, etc. can also be removed by triglyceride, etc.

These harmful gas-absorbing agents are contained in continuous porous materials! 2
In order to support the harmful gas absorbing agent in water or a suitable solvent, a continuous porous material is impregnated with a slurry of S suspension in water or a suitable solvent. Leave to dry by leaving the room.

As a breathable sheet for packaging the nine-continuously porous material on which the harmful gas-absorbing agent obtained in this way is supported, ordinary fabric, cloth, or non-woven fabric is used. Despite this, it has extremely fine pores that do not allow liquid to pass through! If the film you have, for example, "°Tyvek" manufactured by DuPont or l'N manufactured by Tokuyama Soda ■? When using products such as ``R Sheet'' and ``Celboa'' manufactured by Kansui Chemical, even if the harmful gas-absorbing agent inside absorbs water and becomes liquid, the liquid will not leak outside, and the packaging will be easier. Even if the outside of the ring gets wet with water, there is no risk of the water entering the circular part, which is extremely convenient.

V in the present invention! A 9-perforated container (e.g., TBA JILm, a net container made of plastic or metal plate, etc.) in which several types of harmful gas absorbers containing gas absorbing agents are stored in combinations of 211 or more different harmful gas absorbing agents. (or baskets, etc.) are effective as absorption devices for simultaneously absorbing several types of harmful gases.In addition, a combination of activated carbon wrapped in a breathable sheet and stored in a perforated container is a chemical In particular, it is advantageous for effectively absorbing mixed harmful gases that are contained as main components of harmful gases that are difficult to absorb.

Furthermore, if an aromatic agent is placed in a perforated container instead of an activated carbon package, it is possible to absorb and remove harmful gases and at the same time impart a fragrance to the interior of the container. Maku "Tyvek", l'-NIIF
The absorbent material of the present invention using "R Sheet" or "Cellpore" as a packaging material can also be used in coexistence with a desiccant.

The spaces in which the harmful gas absorber or mineral harmful gas absorbing odor of the present invention is meaningful include, for example, the upper space of a drug packaging container, the space inside the factory packaging of a precision machine, There is a space for food raw material wrapping containers, a space inside the collection warehouse, and a space for the factory X room. In addition, the target spaces for use as household goods include refrigerators, kitchen cupboards, food storage, storerooms, closets, and @I! There are storage areas, storage rooms, wardrobes, lockers, basements, pet rooms, and pet storage facilities.

Furthermore, in the seafood processing industry and all processing industries, there are many spaces in which the products of the present invention should be used during processing, storage, and transportation.

By suspending the harmful gas absorber or V-bottle gas absorbing device of the present invention in a space where these harmful gases are generated or flowing, or by applying a planar VctIt, the target harmful gases in the space can be absorbed in a timely manner. Moreover, it can be effectively absorbed and removed.

Although some practical examples based on the present invention will be described in the following examples, the content of the present invention is not limited thereto.

Example 1 Calcined vermiculite Zoo h and apple #45 - Water bath liquid to OK 4t Place in a steam-heated decompressible glass-lined conical blender/dryer and heat to 80°C.
Mix evenly by rotating for 2 hours while heating.

Next, the O device was connected to a vacuum pump, heated with steam while maintaining a reduced pressure of 100-Hf, the inner wall temperature was raised to 110°C, and the dried product was dried while rotating for 3 hours. After cooling to a third strainer, the dried product was taken out. Stored in a sealed VC drum.

From this, 500f was packed into a υMPR sheet shell, and the mouth was heat-sealed to make an alkaline gas absorber.

Ammonia gas is blown into a closed chamber with a central product of 2 d, and the l
lI [t 1000 pPn+, suspend the above absorber in it, and add ammonia st' every hour using a gas detection tube.
tsa + rapid unmorph 1 as shown in Table 1
It showed a decrease of 11 degrees. This was tested under the same conditions as a control, and was much faster than Granular Acidic Tribo IJ @ Dense Aluminum.

1st! ! Residual ammonia gas #Il! This package was placed flat on a vat and poured with 100011.1° of water and allowed to stand for one day, but no acid was detected in the water.

Example 2 Calcined vermiculite 100Kf and 20-lime milk 100
TI4 is mixed uniformly in the same manner as in Example 1 and then dried to obtain an acidic gas absorbent t-. This absorbent 15
After filling a "Tyvek" bag with 0 kl, the opening was heat-sealed to seal it.

Hydrogen chloride gas was blown into a polyethylene inner drum with a capacity of 2 oots, the atmosphere was set to 10001) Pm, the above-mentioned absorber was suspended therein, and hydrogen chloride gas was measured with a gas detection tube. The results showed a rapid decrease in concentration as shown in Figure 211.

Table 2 Case 9 The absorbent material of this example was placed in a vat, 10 cc of water was poured over it, and it was left to stand overnight, but no alkaline content was observed to elute.

Example 3 A 50-aqueous solution of 100 Kl of corn cob meal and hexamethylenetetramine was placed in a 1001l1'i blade rotary mixer and mixed for 1 hour. This was placed in a rotary conical dryer and under reduced pressure of 100 ■ Hf, the jacket was heated to Tochi °C with steam and dried, and after death, it was cooled to room temperature.
Obtain an acid gas absorber.

1 Put 150 f of this absorbent into a Cellpore bag. i closed.

A 200 ton drum was filled with sulfide water gas.
[1000 PI) m, the above-mentioned absorber was suspended therein, and the hydrogen sulfide gas chain*t was determined every hour using a gas detection tube. II showed a decrease in resistance.

Table 3 Also, the absorbent material of this example was placed in a pad, 10 cc of water was poured over it, and it was left overnight, but no alkaline content was observed to elute.

Example 4 50 ~ 50% aqueous solution of potassium carbonate and 50 Kf of calcined permiculite were mixed uniformly in the same manner as in Example 1, then dried, cooled, and each 50 f was sealed in an NFR sheet bag to absorb acid gas. I got a body.

On the other hand, 509 citric acid I aqueous solution 50 edges and calcined permiculite) 50 Jill the same as above and alkaline gas absorber tl! friend.

The above-mentioned dense gas absorber, one bag of alkaline gas absorber, and one bag filled with a 50 tt paper bag of granular activated carbon were placed in a polystyrene 11F vessel to produce a multifunctional harmful gas absorbing device.

This was installed in a large-scale household refrigeration unit (400 tons), and as shown in Table 4, the degree of chaining of ammonia, carbon dioxide, hydrogen sulfide, and mercaptaf was significantly reduced.

Table 4 Malodorous gas 11 degrees (ppm) Also, from an olfactory standpoint, I didn't notice any odor at all.

Example 5 One bag of acidic gas absorber and one bag of alkaline gas absorber in Example 3, and masking fragrance l〇- were put into sheet form.
A multi-functional foul-smelling gas-absorbing fragrance tool was manufactured by soaking the sample in a 20fK loop and closing it with an NFR sheet in a polypropylene porous molded container. I put this in my sweat-prone sports locker and put it in at night, and the next morning I could only smell the masking fragrance.

Example 6 J1. for malodorous gas absorbing fragrance described in Example 5. When I hung it inside the lid of a household compost product, after a while, I could only smell the masking scent.

Procedural amendment April 14, 1980 Director of the Patent Office Kazuinu Wakasugi 1. Indication of the case 1982 Patent Application No. 003482 2. Name of the invention Noxious gas absorber and device 3. Person making the amendment Relationship to the case Patent applicant: 3-1-60 Ukima, Kita-ku, Tokyo Representative: Kaname Nakayama 4, Agent: 8100 Nippon Soda Co., Ltd., 2-2-1 Otemachi, Chiyoda-ku, Tokyo (1) In the 3rd line from the bottom of the specification, in front of 1. ``Fragrance agent'', 1. Together with the harmful gas absorber described in (1) or (2) above.''
Insert.

(2) Delete the last "o" on page 7, line 8 of the specification.

(3) Insert "concentration" next to "hydrogen monochloride gas" on the bottom line of page 10 of the specification.

Claims (5)

[Claims] (1) In a harmful gas absorber in which a continuous porous material supporting a harmful gas absorbing agent is wrapped in an air-permeable sheet,
The harmful gas-absorbing agent is supported in the quenching chamber without substantially closing the internal space of the continuous porous material.t%
Harmful gas absorber that turns into mold. (2) The harmful gas absorber according to Claim B, Paragraph 1, wherein the air permeable sheet is a sheet that is air permeable but impermeable to liquids. (3) A harmful gas absorber in which a harmful gas absorbing agent is supported in the skeleton without substantially enclosing the internal space of the continuous porous material, and the nine-porous material is packaged with an air permeable sheet, A harmful gas absorbing device containing one or more of each type of harmful gas absorbing agent in a perforated container. (4) The air-permeable sheet is air-permeable but does not allow the song to pass through.%W! fClaim No. 3X
For Jl's harmful gas absorption. (5) A noxious gas absorption device according to Claim 3 or Claims@4-pack arrangement, in which an aromatic agent or activated carbon packaged in an air-permeable sheet is housed in a perforated container.