JPS61191367A - Filling of oxygen for respiration - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of filling breathing oxygen. When oxygen is required for portable use or in an emergency, store air or oxygen in a small container that can be easily transported (i.e., 0x21V% in air, pure oxygen should be at least 99.5V% Ox, but 0□ during this time). Oxygen-enriched air is referred to as oxygen-enriched air, and is the object of the present invention. Hereinafter, it will simply be referred to as oxygen gas. ] is used by pressurizing and filling a container with activated carbon, and this invention removes carbon monoxide, which is generated by the reaction between carbon and oxygen, and makes it non-toxic.This invention is popular in the sports world.

It can be used for medical purposes, diving equipment, during disasters, in the working environment, for a change of pace, etc.

(Prior Art) When oxygen gas is transported and stored, it is conventionally filled into a pressure-resistant hollow container (hereinafter referred to as a cylinder) or liquefied and stored in a de-air bottle. Since liquefied oxygen gas vaporizes unless there is special cooling equipment, it is generally filled into cylinders as compressed gas at high pressure, but the cylinders must be thick enough to withstand pressure, so they are extremely heavy and heavy. The High Pressure Gas Control Law applies.

In this regard, the method proposed by the present inventor (Patent Application No. 59-13
No. 1460, Special No. 59-266015, Utility Model Application No. 1983-61205), when a cylinder containing a carbon material with storage capacity (hereinafter referred to as activated carbon) is pressurized with oxygen gas, its volume is approximately This is an efficient method that has been found to double the amount. In other words, a general Nikas body has boiling points regarding its pressure and temperature.

Although the volume is determined according to Schaal's gas law, we have discovered that when activated carbon is used, a larger volume of gas can be stored due to adsorption and occlusion phenomena, which has the advantage of allowing the container to be thinner.

(Problems to be Solved by the Invention) When a cylinder filled with activated carbon is pressurized with oxygen gas, if the temperature is particularly high over time, C. There was a problem when using it for breathing because the co produced by the reaction with 8 mixed air. Co is a toxic gas that combines with hemoglobin, and from an environmental perspective, it is said that 60 ppn+ or less is desirable. However, in the case of activated carbon filling, for example, as shown in the drawing, when <0270V% gas is placed at 50°C and 10ktr/ctiG, the concentration will increase to more than 1.000ppm in about one month, and the concentration will increase at the distribution stage when the product is sold and at the consumption stage. If you carefully consider the conditions, it would be extremely dangerous to put it into practical use. Therefore, if it is to be used for the human body, it is necessary to remove the cob.

(Method of Solving the Problem) Since one of the characteristics of the breathing device for this purpose is its simplicity, it is meaningless to attach a complicated cocoon removal device. Therefore, the method implemented by the present inventor is to fill a container with a CO removal catalyst, whereby the generated CO is oxidized to CO□ and rendered harmless. The toxicity of COt is mild, and it has a high affinity for the activated carbon that it fills, so it has better adsorption than 0! and is difficult to release. This removal will be even more perfect if substances such as hydroxides, etc. are also included.

(Function) The thick solid line in Figure 1 is an example in which commercially available palladium asbestos is used as a CO removal catalyst.

When placed at 50°C, the initial CO concentration is 60 pp at most per caliber.
It rises to m, but then falls again and is kept below 50 ppm. A marked improvement was observed compared to the long dashed line (■) which shows the case without catalyst under the same conditions, and this level of concentration is sufficient for practical use.

Catalysts include those mainly made of rare metals such as Pt, Pd, Ir, and Ag, Cubs, and Nips.

Cuz Ox + Mn Ox + Fe30a
*There are products mainly composed of oxides such as B iz O3, Vz 02, Agt O, etc., and those made into nets or foils to increase the catalyst area, as well as asbestos, diatomaceous earth, etc.
Some are held on a carrier such as ceramics. The catalyst may be placed in a packed bed of activated carbon or in a separate location, for example at a gas outlet.

Example 1 350g of granular activated carbon (Tsurumicol) was packed into an AE480 can for aerosol, and the top was held down with glass wool.
Next, roll up commercially available reagent grade palladium asbestos 4■ into the size of a grain of rice, caulk a mounting cap with a spouting mechanism, and pump 13 kg/g of 0z99.5% oxygen gas through the stem.
The product of the present invention was obtained by press-fitting up to cdG.

The main island can emit 11.51 liters of oxygen gas in use. When the CO concentration in the released gas was measured after being stored at 50°C for 6 months, it was 42 PPm. 1800 P if palladium asbestos is not included
It was Pm.

Example 2 1 kg of granular activated carbon (Tararecol GW), Bopkalift catalyst (MnOz -CuO-NiO-Coz 03
Agz O) A mixture of 10g of 1m pellets and 50g of calcilum peroxide granules was packed into a 2.5mA' internal volume cylinder, and 65% of the mixture was placed in a container with a needle valve.
Oxygen gas was pressurized to 20 kg/aJG.

The main island has about 751 releasable oxygen gases and about 30
It has a breathing time of 1 minute and is used for emergencies such as fires.

Gas analysis after 6 months at room temperature is as follows.

(Effects of the Invention) In the method of filling a large volume of oxygen gas with built-in activated carbon, carbon monoxide generated over time is extinguished, resulting in a gas composition suitable for breathing.

[Brief explanation of the drawing]

The diagram shows the number of days on the horizontal axis and the CO concentration on the vertical axis, and shows the CO concentration in O2 gas pressurized into a container filled with activated carbon and a container filled with activated carbon and Pd asbestos when kept at 50°C. It is. Number of days that have passed (marked)

Claims (1)

[Claims] A method of producing oxygen for breathing, characterized in that air, oxygen-enriched air, or oxygen is filled under pressure into a container containing a carbon material having a storage capacity and a catalyst that excludes carbon monoxide. Filling method.