JPH0432002B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves eluting a sodium carbonate/hydrogen peroxide adduct (also referred to as soda percarbonate) into water and contacting it with a decomposition enzyme or a decomposition catalyst to release oxygen. This invention relates to an oxygen generating device that generates oxygen with little risk of liquid leakage.

[Conventional technology]

Conventionally, oxygen generation methods include methods that incorporate an oxygen cylinder itself, methods that use liquid oxygen, and methods that mix hydrogen peroxide, sodium carbonate, and hydrogen peroxide adducts with inorganic catalysts such as manganese dioxide, and generate oxygen through a decomposition reaction. There are known methods to generate this.

In addition, Japanese Patent Application Laid-Open No. 115792/1983 discloses that a generator made of a porous cylindrical body containing a catalyst is attached to and detached from a peroxide compound container, thereby allowing a peroxide compound solution and a catalyst to be mixed only when oxygen is required. A method and apparatus for contacting and generating oxygen is described.

JP-A-54-142896 discloses that hydrogen peroxide solution is normally stored inside a container with the lid carrying the catalyst facing upward, and when used, the container is turned upside down.
A method and apparatus for generating oxygen are described in which oxygen is generated by bringing hydrogen peroxide into contact with a catalyst.

JP-A-62-59503 describes a method of generating oxygen by bringing an addition compound of soda carbonate and hydrogen peroxide into contact with water containing a liquid catalyst such as an aqueous solution of manganese sulfate. .

[Problem to be solved by the invention]

However, those with built-in oxygen cylinders are disposable and therefore costly.
Additionally, products with a structure that decomposes hydrogen peroxide or sodium carbonate/hydrogen peroxide adducts by mixing them with an inorganic catalyst have disadvantages such as once the reaction starts, it continues as long as hydrogen peroxide is present and cannot be interrupted. There is.

In addition, in the oxygen generator described in JP-A No. 52-115792, the porous cylindrical body must be attached and removed, which takes time and effort, and when the porous cylindrical body is removed, the porous cylindrical body There are disadvantages such as the liquid from the tip of the body adhering to hands, clothing, etc.

Furthermore, in the oxygen generator described in Japanese Patent Application Laid-Open No. 54-142896, the stopper is located at the bottom when oxygen is being generated, so there is a risk of liquid leaking from around the stopper.

The present invention has been made to solve the above-mentioned problems. Oxygen generation can be appropriately interrupted by turning the closed container sideways, and oxygen generation can be restarted by placing the closed container in the normal position. The object of the present invention is to provide an oxygen generating device that has no opening/closing parts in the liquid contact part in the normal position, and has very little risk of liquid leakage.

[Means to solve the problem]

In order to achieve the above object, the oxygen generator of the present invention will be described with reference to FIGS. A cylindrical body 5 is provided with a porous body 4 at the side end of the airtight container so that gas and liquid can freely pass through the periphery and the bottom.
The sodium carbonate/hydrogen peroxide adduct 6 is stored in this cylindrical body, and the cylindrical body is placed in the vertical position in the closed container to dissolve the decomposing enzyme or to dissolve the decomposing catalyst. When a predetermined amount of water 7 containing suspended or dissolved water is poured, at least a part of the cylindrical body 5 comes into contact with the water 7, and when the closed container is turned sideways, the cylindrical body 5 is prevented from coming into contact with the water 7. Only when the cylindrical body is attached to the cylindrical body and the closed container 1 is placed in the correct position, the sodium carbonate/hydrogen peroxide adduct eluted into the water comes into contact with the decomposition enzyme or the decomposition catalyst.
It is characterized by the fact that it generates oxygen.

Further, another oxygen generating device of the present invention will be described with reference to FIGS. 5 and 6. An opening 2 is provided in the upper part of a closed container 1, and a removable lid part 3 is provided in this opening, A cylindrical body 5 with a porous body 4 provided at the periphery and bottom so that gas and liquid can freely pass through is housed in the side end of this airtight container, and sodium carbonate and hydrogen peroxide are contained in the cylindrical body. The adduct 6 is housed, an immobilized enzyme or catalyst 21 is fixed on the lower side of the cylindrical body 5, the cylindrical body is positioned in the vertical position, and a predetermined amount of water 7 is poured into the closed container. When the container is filled with water, at least a part of the cylindrical body 5 comes into contact with the water 7, and when the airtight container is turned sideways, the cylindrical body 5 comes into contact with the water 7.
Only when the cylindrical body is attached to avoid contact with the water and the closed container 1 is placed in the correct position, the sodium carbonate/hydrogen peroxide adduct eluted into the water comes into contact with the decomposition enzyme or decomposition catalyst, and oxygen is generated. It is characterized by the fact that

As an enzyme for decomposing hydrogen peroxide, catalase, which is sold as an enzyme agent in the food industry, is used. Catalase is easily crystallized and is obtained in crystal form from liver, red blood cells, bacteria, etc., and has a molecular weight of approximately 225,000.

Catalase can be used by (1) dissolving it in water in a sealed container, (2) simply attaching it to paper, porous material, etc. and storing it in a cylindrical body, (3) ) Examples include a method in which an immobilized enzyme fixed by various immobilization methods is housed in a cylindrical body.

The above-mentioned methods for immobilizing catalase include (1) carrier binding method in which it is immobilized on an insoluble carrier by covalent bond, ionic bond, physical adsorption, biochemical affinity, etc.; (2) glutaraldehyde bonding between biocatalysts; (3) Polymer gels produced by polymerizing or associating low-molecular compounds, or by transferring high-molecular compounds from a soluble state to an insoluble state. (4) Composite methods that combine these three methods as appropriate are used.

Examples of carriers for covalent bonding in the carrier bonding method (1) include cellulose, agarose, dextran,
Chitin, collagen, amino acid polymer, polystyrene, ethylene-maleic acid copolymer, polyacrylamide, polyvinyl alcohol, nylon, 4,6-dichloro-S-triazinyl ion exchanger, ion exchange resin, glass beads, nickel silica alumina, zirconia , ceramics, etc. are used, and physical adsorption carriers include sand (alkylaminated), carbon, activated carbon, silica gel, alumina, molecular sieve, titania, stainless steel, calcium phosphate gel, phenoxy acetylate, Chitin, agarose gel, cellulose, tannin, silicone rubber, etc. are used, and as carriers for ion binding, Amberlite, Diaion, Sephadex, cellulose, etc. are used.

In addition to glutaraldehyde, crosslinking agents used in the crosslinking method (2) include maleimide derivatives, aryl halides, isocyanates, imidasters, chloro-S-triazines, hexamethylene diisothiocyanate, bisdiazobenzidine, etc. used.

In the entrapping method (3), the lattice-type enveloping materials include collagen, fibrin, albumin, casein, cellulose fiber, cellulose triacetate, agar, calcium alginate, carrageenan, agarose, polyacrylamide, poly-
2-Hydroxyethyl methacrylic acid, polyvinyl chloride, γ-methylpolyglutamic acid, polystyrene, polyvinylpyrrolidone, polydimethylacrylamide, polyurethane, photocrosslinkable resins, etc. are used, and the enclosing materials for microcapsules include collodion, nylon, and polystyrene. , polyurea, ethylcellulose, silicone derivatives,
Phenylsiloxane, cellulose nitrate, etc. are used, and hydrocarbons, phospholipids, etc. are used as enclosing materials for liposomes.

In addition, as a decomposition catalyst, (1) manganese dioxide, (2)
Iron, copper, silver, nickel, cobalt, manganese, chromium, lead, vanadium, tungsten, etc. can be used alone or in combination.

[Effect]

When the airtight container 1 is placed in the correct position, the sodium carbonate/hydrogen peroxide adduct 6 in the cylindrical body 5 comes into contact with the water 7 and gradually dissolves in the water, and the decomposing enzyme or Oxygen is generated by contacting with a decomposition catalyst, a decomposition enzyme or decomposition catalyst that is eluted or transferred from inside the cylindrical body 5 into water, or with an immobilized enzyme or immobilized decomposition catalyst within the cylindrical body.

The reaction formula at this time is as follows.

Na ₂ CO ₃ 3/2H ₂ O ₂ →Na ₂ CO ₃ ＋3/2H ₂ O＋3/4O ₂
↑(1) Na ₂ CO ₃ 3/2H ₂ O ₂ →Na ₂ CO ₃ +3/2H ₂ O _{2 3} /2H ₂ O ₂ →3/2H ₂ O＋3/40 ₂ ↑ (2) (3) [Example ] Hereinafter, embodiments of the present invention will be described based on the drawings.

1 to 4 show an embodiment of the oxygen generator of the present invention. Reference numeral 1 denotes a closed container, which has an opening 2 at the top, and a lid (stopper) 3 that can be attached to and detached from the opening.
have. The lid part 3 can be screwed in, inserted,
It shall be able to be sealed tightly by fitting etc.

At the end inside the closed container 1, the pore size is 0.01 to allow free passage of gas and liquid to the periphery and bottom.
A cylindrical body 5 provided with a porous material 4 such as a net material of ~3 mm is housed, and a sodium carbonate/hydrogen peroxide adduct 6 is housed in this cylindrical body. Therefore, the cylindrical body 5
As shown in FIG. 3, when a predetermined amount of water 7 is placed in the closed container 1 in the correct position in the vertical direction, at least a part of the cylindrical body 5 comes into contact with the water 7,
When the closed container 1 is laid down on its side as shown in FIG. 4, the cylindrical body 5 is prevented from coming into contact with the water 7.

Since the degrading enzyme or the decomposing catalyst is suspended or dissolved in water 7 in advance, the sodium carbonate/hydrogen peroxide adduct eluted into the water comes into contact with the degrading enzyme or the decomposing catalyst. ,
Generates oxygen.

The generated oxygen flows into an introduction pipe 11 opened at the same position as the cylindrical body 5 on the side of a washing cylinder 10 containing air washing water 8 set inside the upper part of the cylindrical body 5.
The air flows out from the air diffuser 12 consisting of a filter at the lower end of the introduction pipe, is washed with air washing water 8, and is then sent to the oxygen inhaler 14 through the hose 13. 15
is the top surface of the container, 16 is the bottom surface of the container, 17 is the side surface of the container,
18 is a generated oxygen gas, 20 is an opening, 22 is a screw, and 23 is a packing.

Next, an example of an operation for generating oxygen using the oxygen generator shown in FIGS. 1 to 4 will be described. First, the lid part 3 is opened and the washing cylinder 10 and the cylindrical body 5 are taken out. A predetermined amount of sodium carbonate/hydrogen peroxide adduct 6 is put into the cylindrical body 5 externally, and air washing water 8 is put into the washing cylinder 10, which is set inside the upper part of the cylindrical body 5, and then into the airtight container 1. A predetermined amount of water 7 is also added to the water, and a predetermined amount of an enzyme aqueous solution or catalyst is added to this water. Then, the cylindrical body 5 is set in the closed container 1, and the lid 3 is closed. The generated oxygen gas is
The oxygen is inhaled from the oxygen inhaler 14.

When it is desired to interrupt oxygen generation, as shown in FIG. 4, the container is placed sideways so that the side surface 17 is at the bottom. When it is desired to restart oxygen generation, turn the bottom surface 16 of the container downward again as shown in FIG. When the reaction is completed, the internal reaction completion liquid and air washing water are discarded.

Next, another embodiment of the oxygen generating device of the present invention will be described based on FIGS. 5 and 6. In this embodiment, a decomposition enzyme or a decomposition catalyst is attached or fixed to a fixed object and stored in the lower part of the cylindrical body 5, and a sodium carbonate/hydrogen peroxide adduct 6 is stored in the upper part of the cylindrical body 5. , when no enzyme or catalyst is added to the water in the closed container 1.

Therefore, when the closed container is placed in the correct position as shown in FIG. 5, the sodium carbonate/hydrogen peroxide adduct and the enzyme or catalyst migrate into the water 7 and come into contact and react to generate oxygen. 21 is an immobilized enzyme or catalyst.

An experimental example will be explained below.

Experimental Example 1 A suspension of 1 g of manganese dioxide in 1 part of water was placed in a sealed container shown in Figure 4, while 100 g of powdered sodium carbonate/hydrogen peroxide adduct was placed in a cylindrical body covered with a mesh material. and set it in an airtight container. When the sealed container was placed in the correct position as shown in Figure 3, oxygen began to be generated. The temporal change in the amount of oxygen generated was as shown in Figure 7.

Experimental Example 2 Water 1 was placed in the airtight container shown in Figure 6, and on the other hand,
5 g of catalase-immobilized gel immobilized by the acrylamide method wrapped in 25 cm ² of non-woven fabric was stored in the lower part of the cylindrical body, and powdered sodium carbonate, The cylindrical body was placed in a closed container containing 100 g of hydrogen peroxide adduct. When the sealed container was placed in the normal position as shown in FIG. 5, oxygen was generated, and when the container was tipped on its side as shown in FIG. 6, gas generation was interrupted, and when the container was placed in the normal position again, gas generation resumed. The temporal change in the amount of oxygen generated was as shown in Figure 8.

Experimental Example 3 An aqueous solution of 2 ml of catalase stock solution dissolved in 1 part water was placed in the airtight container shown in Figure 4, while 100 g of powdered sodium carbonate/hydrogen peroxide adduct was placed in a cylindrical body covered with a mesh material. and set it in an airtight container. When the sealed container was placed in the normal position as shown in FIG. 3, oxygen was generated, and when the container was turned sideways as shown in FIG. 4, gas generation was interrupted, and when the container was placed in the normal position again, gas generation resumed. The temporal change in the amount of oxygen generated was as shown in Figure 8.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

(1) Oxygen generation can be interrupted appropriately by turning the sealed container on its side, and oxygen generation can be restarted by returning the sealed container to its normal position. In the normal position, there is no opening/closing part in the liquid contact area, so the risk of liquid leakage is extremely reduced.

(2) Both methods can be adopted: a method in which the enzyme or decomposition catalyst is dissolved in water in advance, and a method in which the enzyme or decomposition catalyst is stored in a cylindrical body.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the oxygen generating device of the present invention, Fig. 2 is an explanatory longitudinal cross-sectional view of the same, and Fig. 3 is oxygen generation when a degrading enzyme or a degrading catalyst is suspended or dissolved in water. FIG. 4 is a perspective view showing the state of the device during reaction (normal position), FIG. 4 is a perspective view showing the state when oxygen generation is interrupted (sideways position), and FIG. Or, a perspective view showing the state of the oxygen generator during reaction (normal position) when the decomposition catalyst is attached or immobilized to a fixed object and stored in the lower part of the cylindrical body. ), FIG. 7 is a graph showing the change over time in the amount of generated oxygen in Experimental Example 1, and FIG. 8 is a graph showing the change over time in the amount of oxygen generated in Experimental Examples 2 and 3. 1... Airtight container, 2... Opening, 3... Lid, 4
... Porous body, 5 ... Cylindrical body, 6 ... Sodium carbonate/hydrogen peroxide adduct, 7 ... Water, 8 ... Air washing water, 10 ... Wash cylinder, 11 ... Introductory pipe, 12 ... …
Diffuser pipe, 13...hose, 14...oxygen inhaler,
15... Container top surface, 16... Container bottom surface, 17...
Container side, 18... Generated oxygen gas, 20... Opening, 21... Immobilized enzyme or catalyst, 22... Screw, 23... Packing.

Claims (1)

[Claims] 1. An opening 2 is provided in the upper part of the sealed container 1, and a removable lid part 3 is provided in this opening, so that gas and liquid can freely flow at the side edges, the periphery, and the bottom of the sealed container. A cylindrical body 5 provided with a porous body 4 so that it can pass through the
The sodium carbonate/hydrogen peroxide adduct 6 is stored in this cylindrical body, and the cylindrical body is placed in the vertical position in the closed container to dissolve the decomposing enzyme or to dissolve the decomposing catalyst. When a predetermined amount of water 7 containing suspended or dissolved water is poured, at least a part of the cylindrical body 5 comes into contact with the water 7, and when the closed container is turned sideways, the cylindrical body 5 is prevented from coming into contact with the water 7. Only when the cylindrical body is attached to the cylindrical body and the closed container 1 is placed in the correct position, the sodium carbonate/hydrogen peroxide adduct eluted into the water comes into contact with the decomposition enzyme or the decomposition catalyst.
An oxygen generator characterized by generating oxygen. 2 An opening 2 is provided in the upper part of the sealed container 1, a removable lid part 3 is provided in this opening, and porous holes are provided in the side edges of the sealed container so that gas and liquid can freely pass through the periphery and bottom. A cylindrical body 5 provided with a body 4
A sodium carbonate/hydrogen peroxide adduct 6 is stored in this cylindrical body. Furthermore, an immobilized enzyme or catalyst 21 is fixed on the lower side of the cylindrical body 5, and the cylindrical body is vertically moved. When a predetermined amount of water 7 is placed in the sealed container in the correct position, at least the cylindrical body 5
The cylindrical body is attached so that the cylindrical body 5 does not come into contact with the water 7 when the closed container is turned sideways, and only when the closed container 1 is placed in the normal position, the carbonic acid eluted into the water An oxygen generator characterized in that oxygen is generated by contact between a sodium/hydrogen peroxide adduct and a decomposition enzyme or a decomposition catalyst.