JPH0310373B2 - - Google Patents
Info
- Publication number
- JPH0310373B2 JPH0310373B2 JP201682A JP201682A JPH0310373B2 JP H0310373 B2 JPH0310373 B2 JP H0310373B2 JP 201682 A JP201682 A JP 201682A JP 201682 A JP201682 A JP 201682A JP H0310373 B2 JPH0310373 B2 JP H0310373B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- absorbent
- platinum
- gas masks
- hydrochloric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 14
- 239000002250 absorbent Substances 0.000 claims description 13
- 230000002745 absorbent Effects 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
この発明は、空気中のCO濃度が許容限界以上
になつたときに使用されるガスマスクのための
CO吸収剤の製造方法に関するものである。
従来よりビルデイング、地下街、炭鉱抗道など
のような外気から遮断された環境で火炎が発生す
ると、酸素不足のために多量のCOが発生し、人
体に対するCOの許容限界濃度は50ppmであると
されているので、CO中毒による死亡の危険性が
高く、また死亡に至らないまでも、CO中毒の後
遺症によつて廃人となるケースも多い。従つて、
上述のような環境では、災害の発生に備えてCO
用ガスマスクの設置を義務づけるべきであるとい
われているが、しかしながら、現在のCO用ガス
マスクは種々の欠陥があつて、設置しても、充分
な効果が得られるかどうか凝問である点が多い。
即ち、現在市販されているCO用ガスマスクは、
CO吸収剤としてホブカリツトと呼ばれている
MnO2・CuO系触媒を使用し、この触媒によつて
COを常温でCO2に酸化させる方式を採用してい
るが、その使用可能時間は下記のように短い。
CO濃度（ppm） 有効時間（分）
3000 60〜70
5000 90〜110
10000 200〜230
また上記の有効時間内でも、一度使用したもの
が再使用できないし、水が存在すると吸収効果が
著るしく低下するので、吸収剤とともにシリカゲ
ルのような吸湿剤を併用することが不可欠である
などの欠点があつて、広く実用化するためには問
題が多い。
この発明は上述の点に鑑み為されたもので、長
時間にわたるCO吸収特性と、吸収効果が水分の
存在によつて影響されないガスマスク用CO吸収
剤の製造方法を提供することを目的とするもので
ある。
この発明によるガスマスク用CO吸収剤の製造
方法は、適当な粒度の活性炭を塩酸で洗浄し、塩
化白金酸を水で溶解した後の溶液に上記塩酸によ
る洗浄を経た活性炭を混合して加熱することによ
つて、その活性炭に白金を坦持させ、上記白金が
坦持された活性炭をアルカリで中和した後に還元
させるものである。
この発明により製造されたガスマスク用CO吸
収剤は、塩化白金酸を水で溶解した後の溶液に、
塩酸で洗浄した後の活性炭を混合した状態で加熱
するようにして、その活性炭に白金を坦持させる
ようにしたので、活性炭の粒子の加熱に白金を渾
然一体に坦持させることができる。しかも、白金
は常温でCO吸収特性が非常に高い上に、CO吸収
効果が水分によつて阻害されることがない。
従つて、従来のポプカリツト触媒によるCO吸
収剤と比較して、10〜2.5倍にも及ぶ長時間の使
用が可能であり、また湿度の高い条件のもとで
も、吸湿剤を併用することなく充分なCO吸収効
果を発揮する、ガスマスク用CO吸収剤を製造す
ることができる。
実施例
粒度300メツシユの活性炭に下記の第１表に示
す条件で白金を担持させることによつて５種の試
料を調製した。白金の担持は、活性炭10ｇを秤取
してこれに必要に応じて前処理を施し、ついで塩
化白金酸１ｇを水20c.c.に溶解した溶液を混合した
のち、水浴上で90℃に２時間加温することによつ
て行われた。なお活性炭として、試料No.１〜No.４
では第１炭素(株)製の商品名「BFG」を、また試
料No.５では同社製「GA4−６」を使用した。
各試料No.１〜No.５について、常温、相対湿度80
％の条件でCO吸収テストを行つた結果を第２表
に示す。また常温、相対温度90％の場合のテスト
結果を第３表に示す。
以上の如く、これらのテスト結果から、この発
明のCO吸収剤は、500時間を越える長時間にわた
つて有効にCOを吸収するとともに、この吸収効
果が水分によつて阻害されないということが明ら
かである。したがつてこのCO吸収剤を使用した
CO用ガスマスクは、地下街やビル内、あるいは
炭抗などの火災時における救命用として高い実用
性を発揮する。
This invention is for gas masks used when the CO concentration in the air exceeds the permissible limit.
The present invention relates to a method for producing a CO absorbent. Traditionally, when a flame occurs in an environment that is isolated from the outside air, such as in a building, underground mall, or a coal mine tunnel, a large amount of CO is generated due to lack of oxygen, and the limit concentration of CO for the human body is said to be 50 ppm. Therefore, there is a high risk of death due to CO poisoning, and even if they do not die, there are many cases where they become disabled due to the aftereffects of CO poisoning. Therefore,
In the environment described above, CO
It is said that the installation of CO gas masks should be compulsory, but the current CO gas masks have various defects, and it is unclear whether they will be sufficiently effective even if they are installed. There are many. In other words, the CO gas masks currently on the market are:
It is called Hobkaritz as a CO absorbent.
Using a MnO 2 /CuO catalyst, this catalyst
The system uses a method that oxidizes CO to CO 2 at room temperature, but its usable time is short as shown below. CO concentration (ppm) effective time (minutes) 3000 60~70 5000 90~110 10000 200~230 Also, even within the above effective time, once used, it cannot be reused, and the absorption effect will be significant if water is present. This has the disadvantage that it is essential to use a moisture absorbent such as silica gel together with the absorbent, which poses many problems for widespread practical use. The present invention has been made in view of the above points, and aims to provide a method for producing a CO absorbent for gas masks that has long-lasting CO absorption properties and whose absorption effect is not affected by the presence of moisture. It is something. The method for manufacturing a CO absorbent for gas masks according to the present invention is to wash activated carbon of an appropriate particle size with hydrochloric acid, dissolve chloroplatinic acid in water, mix the activated carbon washed with hydrochloric acid, and heat the mixture. Particularly, platinum is supported on the activated carbon, and the platinum-supported activated carbon is neutralized with an alkali and then reduced. The CO absorbent for gas masks manufactured by this invention is made by dissolving chloroplatinic acid in water and adding it to the solution.
Platinum is supported on the activated carbon by heating the activated carbon after washing with hydrochloric acid in a mixed state, so that the platinum can be supported in a harmonious manner by heating the activated carbon particles. Moreover, platinum has extremely high CO absorption properties at room temperature, and its CO absorption effect is not inhibited by moisture. Therefore, it can be used for a long time, which is 10 to 2.5 times longer than conventional CO absorbents using popcalit catalysts, and it can be used for a long time even under high humidity conditions without using a moisture absorbent. It is possible to produce a CO absorbent for gas masks that exhibits excellent CO absorption effects. Examples Five types of samples were prepared by supporting platinum on activated carbon having a particle size of 300 mesh under the conditions shown in Table 1 below. To support platinum, 10 g of activated carbon is weighed out, pretreated as necessary, mixed with a solution of 1 g of chloroplatinic acid dissolved in 20 c.c. of water, and heated to 90°C on a water bath for 20 minutes. This was done by heating for hours. In addition, as activated carbon, samples No. 1 to No. 4
In this case, the product name "BFG" manufactured by Daiichi Carbon Co., Ltd. was used, and in sample No. 5, "GA4-6" manufactured by the same company was used. For each sample No. 1 to No. 5, room temperature, relative humidity 80
Table 2 shows the results of a CO absorption test conducted under the conditions of %. Table 3 shows the test results at room temperature and 90% relative temperature. As described above, from these test results, it is clear that the CO absorbent of the present invention effectively absorbs CO for a long period of time exceeding 500 hours, and that this absorption effect is not inhibited by moisture. be. Therefore, this CO absorbent was used.
CO gas masks are highly practical for life-saving purposes in the event of a fire in underground malls, buildings, or coal mines.
【表】【table】
【表】【table】
【表】【table】
Claims (1)
を水で溶解した後の溶液に上記塩酸による洗浄を
経た活性炭を混合して加熱することによつて、そ
の活性炭に白金を坦持させる工程と、上記白金が
坦持された活性炭をアルカリで中和する工程と、
上記中和された活性炭を還元する工程とを備えた
ガスマスク用CO吸収剤の製造方法。1. A step of washing activated carbon with hydrochloric acid, and a step of supporting platinum on the activated carbon by mixing the activated carbon that has been washed with hydrochloric acid with a solution obtained by dissolving chloroplatinic acid in water and heating the mixture. , a step of neutralizing the platinum-supported activated carbon with an alkali;
A method for producing a CO absorbent for a gas mask, comprising the step of reducing the neutralized activated carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP201682A JPS58119338A (en) | 1982-01-08 | 1982-01-08 | Co-absorbent for gas mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP201682A JPS58119338A (en) | 1982-01-08 | 1982-01-08 | Co-absorbent for gas mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58119338A JPS58119338A (en) | 1983-07-15 |
| JPH0310373B2 true JPH0310373B2 (en) | 1991-02-13 |
Family
ID=11517546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP201682A Granted JPS58119338A (en) | 1982-01-08 | 1982-01-08 | Co-absorbent for gas mask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58119338A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168135A (en) * | 1984-09-11 | 1986-04-08 | Topy Ind Ltd | Agent for removing carbon monoxide in tobacco smoke |
| JP2699424B2 (en) * | 1988-07-20 | 1998-01-19 | トヨタ自動車株式会社 | Resin ball tilt steering yoke |
-
1982
- 1982-01-08 JP JP201682A patent/JPS58119338A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58119338A (en) | 1983-07-15 |
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