JPH0692614A - Ozone decomposer and its production - Google Patents
Ozone decomposer and its productionInfo
- Publication number
- JPH0692614A JPH0692614A JP4239747A JP23974792A JPH0692614A JP H0692614 A JPH0692614 A JP H0692614A JP 4239747 A JP4239747 A JP 4239747A JP 23974792 A JP23974792 A JP 23974792A JP H0692614 A JPH0692614 A JP H0692614A
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- activated carbon
- heat treatment
- treatment
- decomposer
- 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.)
- Withdrawn
Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 6
- 239000011261 inert gas Substances 0.000 claims abstract description 5
- 230000002829 reductive effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 238000011282 treatment Methods 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000005949 ozonolysis reaction Methods 0.000 description 4
- 235000013162 Cocos nucifera Nutrition 0.000 description 3
- 244000060011 Cocos nucifera Species 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000008380 degradant Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、気体中に含有される有
害且つ悪臭のあるオゾンを接触的に分解する為のオゾン
分解材、およびその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone decomposing material for catalytically decomposing harmful and malodorous ozone contained in a gas, and a method for producing the same.
【０００２】[0002]
【従来の技術】オゾンは強い酸化能を有すると共に、自
らは分解反応によって無害な酸素となるので、脱臭や殺
菌，漂白等の目的で様々な分野において利用されてい
る。しかしながら上記オゾンが未反応のまま大気中に放
出されると、その臭いが悪臭となって不快感をもたらす
ばかりでなく、ある濃度以上になると呼吸器を侵しはじ
めるので、たとえ微量であっても長時間吸入することは
人体にとって極めて有害である。2. Description of the Related Art Ozone has a strong oxidizing ability, and because it decomposes into harmless oxygen by itself, it is used in various fields for deodorization, sterilization, bleaching and the like. However, if the ozone is released into the atmosphere in an unreacted state, not only will the odor become a foul odor and cause discomfort, but if it exceeds a certain concentration, it will start to attack the respiratory organs. Inhalation for a long time is extremely harmful to the human body.
【０００３】特に近年では、乾式の複写機等に代表され
る各種高電圧発生装置から発生するオゾンによる室内汚
染が指摘されており、環境衛生上廃オゾンを分解除去し
て無害化する技術の確立が望まれている。Particularly in recent years, indoor pollution due to ozone generated from various high-voltage generators typified by dry copying machines has been pointed out, and a technique for decomposing and removing waste ozone to make it harmless is established for environmental hygiene. Is desired.
【０００４】これまでの廃オゾン処理方法としては、様
々なものが知られているが、特に代表的なものとして、
(a) 金属酸化物を用いたオゾン分解触媒による処理方
法、(b) 活性炭を利用した処理方法が挙げられる。Various waste ozone treatment methods have been known so far, but as a typical one,
Examples include (a) a treatment method using an ozone decomposition catalyst using a metal oxide, and (b) a treatment method using activated carbon.
【０００５】オゾン分解触媒による処理方法は、高濃度
のオゾンを処理するのに有効であるが、低濃度のオゾン
を高効率で処理するには活性が不十分であると言われて
いる。こうしたことから、シリカゲルに金属酸化物を担
持させて性能を上げたオゾン分解触媒も提案されている
が（例えば特開平4-16240 号）、常温における分解能が
低く、それを補う為に発熱体を併用することが例示され
ている。The treatment method using an ozone decomposition catalyst is effective for treating high-concentration ozone, but it is said that its activity is insufficient for treating low-concentration ozone with high efficiency. For this reason, an ozone decomposition catalyst having improved performance by supporting a metal oxide on silica gel has been proposed (for example, Japanese Patent Laid-Open No. 4-16240), but its resolution at room temperature is low, and a heating element is used to compensate for it. It is exemplified that they are used in combination.
【０００６】一方活性炭による処理方法は、低濃度のオ
ゾンを分解除去する方法として有効であり、活性炭の持
つ接触的分解作用を利用した処理方法が汎用されている
（例えば真田雄三ら編，「新版活性炭，P.175 ，講談社
(1992)）。そして上記活性炭としては、やし殻や石炭を
原料とし、水蒸気雰囲気中で賦活されたものが一般的で
ある。また活性炭は通常フィルター状で用いられ、通気
性のある適当な担体に粉末状活性炭を担持させたり、或
は炭化物を押出し成形によってハニカム状に成形した
後、賦活して活性炭化させる方法等が実用化されてい
る。On the other hand, the treatment method with activated carbon is effective as a method for decomposing and removing low-concentration ozone, and a treatment method utilizing the catalytic decomposition action of activated carbon is widely used (for example, edited by Yuzo Sanada, “New Edition”). Activated carbon, P.175, Kodansha
(1992)). The activated carbon is generally made of coconut shell or coal as a raw material and activated in a steam atmosphere. In addition, activated carbon is usually used in the form of a filter, and powdered activated carbon is supported on a suitable air-permeable carrier, or a method of extruding a carbide into a honeycomb shape and then activating it to activate carbonization is practically used. Has been converted.
【０００７】しかしながら活性炭は、活性炭とオゾンの
反応機構の関係上、使用に際して比較的早期に酸化消耗
してしまうことから寿命が短く、臭気限界に達した時点
で頻繁に交換する必要があり、不経済である。こうした
ことから、活性炭の性能を更に高めると共に、寿命を更
に長くすることによって経済性を高めることのできる活
性炭の実現が望まれている。However, because of the reaction mechanism between activated carbon and ozone, activated carbon is consumed by oxidation relatively early in use, and therefore has a short life and needs to be replaced frequently when the odor limit is reached. It is an economy. For these reasons, it is desired to realize activated carbon capable of further improving the performance of the activated carbon and further improving the economical efficiency by extending the life of the activated carbon.
【０００８】[0008]
【発明が解決しようとする課題】本発明はこのような事
情に着目してなされたものであって、その目的は、オゾ
ン分解効率を更に高めると共に長寿命の使用に耐え得る
様なオゾン分解材、およびその様な分解材を製造する為
の有用な方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to further enhance ozone decomposition efficiency and to endure long-life use. , And to provide a useful method for producing such degradants.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成し得た本
発明方法とは、活性炭を、不活性ガス若しくは還元性ガ
ス雰囲気中または真空減圧下に、400 〜1200℃で熱処理
する点に要旨を有するものであり、この方法によって、
活性炭の有する接触的分解能力を高め、且つ長寿命のオ
ゾン分解材が得られる。また上記熱処理に先立ち活性炭
を酸化処理することも有効であり、それによってオゾン
分解材の性能を更に高めることができる。Means for Solving the Problems The method of the present invention that has achieved the above objects is that activated carbon is heat-treated at 400 to 1200 ° C. in an inert gas or reducing gas atmosphere or under reduced pressure in a vacuum. With this method,
It is possible to obtain an ozone decomposing material having a long life and an enhanced catalytic decomposing ability of activated carbon. It is also effective to oxidize the activated carbon prior to the heat treatment, which can further enhance the performance of the ozone decomposing material.
【００１０】[0010]
【作用】本発明者らは、活性炭のオゾン分解能力を高め
る為に、特にどの様な熱処理を施せば活性炭のオゾン分
解能力を高めることができるかについて、様々な角度か
ら検討した。その結果、でき上った活性炭に追加する工
程として、或は活性炭製造の最終工程として、不活性ガ
ス若しくは還元性ガスまたは真空減圧下に所定の温度で
熱処理してやれば、活性炭のオゾン分解能力を著しく高
め、且つ寿命も著しく長くなることを見出し、本発明を
完成した。In order to enhance the ozone decomposing ability of the activated carbon, the present inventors have examined from various angles what kind of heat treatment should be performed to enhance the ozone decomposing ability of the activated carbon. As a result, if it is heat-treated at a predetermined temperature under an inert gas or a reducing gas or vacuum decompression as a step of adding to the finished activated carbon or as a final step of the activated carbon production, the ozone decomposing ability of the activated carbon is significantly increased The present invention has been completed by finding out that the life is increased and the life is remarkably extended.
【００１１】活性炭は一般に、やし殻や石炭等の炭素含
有物質を炭化し、更に水蒸気等の酸化雰囲気中で賦活す
ることによって得られるので大部分は炭素であるが、表
面にはカルボキシル基やヒドロキシル基などの各種酸素
官能基が存在している。オゾンを処理することによっ
て、オゾンは酸素に分解するとともに（Ｏ3 →Ｏ2 ）、
一部の酸素原子は表面炭素と反応して二酸化炭素等とし
て脱離すると考えられるが、一部は酸素官能基を形成し
て、表面に残留すると考えられる。Activated carbon is generally obtained by carbonizing a carbon-containing substance such as coconut shell or coal and further activating it in an oxidizing atmosphere such as steam, so most of it is carbon, but carboxyl groups and There are various oxygen functional groups such as hydroxyl groups. By treating ozone, it decomposes into oxygen (O 3 → O 2 ),
It is considered that some oxygen atoms react with surface carbon and are eliminated as carbon dioxide, etc., but some oxygen atoms are considered to form oxygen functional groups and remain on the surface.
【００１２】本発明者らは、酸素官能基の種類と濃度が
オゾン分解活性に影響すると考えて、官能基の濃度を増
減させる種々の操作を行い、オゾン分解性能との関係を
調べた。その結果、後記実施例に示す様に酸素官能基を
除去する方向の熱処理が有効であることを明らかにし
た。即ち、炭素表面の酸素官能基が除去された位置がオ
ゾン分解の活性点になると共に、上記の様な熱処理によ
って酸素官能基を除去することによってオゾン分解活性
が向上することを明らかにしたのである。The present inventors considered that the type and concentration of the oxygen functional group influence the ozonolysis activity, and conducted various operations for increasing or decreasing the concentration of the functional group to investigate the relationship with the ozonolysis performance. As a result, it was clarified that the heat treatment in the direction of removing the oxygen functional group was effective as shown in the Examples below. That is, it was clarified that the position where the oxygen functional group was removed on the carbon surface became the active site of ozone decomposition and that the ozone decomposition activity was improved by removing the oxygen functional group by the heat treatment as described above. .
【００１３】ところで本発明においては、熱処理温度
は、400 〜1200℃とする必要がある。温度が低過ぎると
表面官能基の脱離速度が非常に低くなり、これに対応し
て、性能向上も僅かになる。例えば、窒素気流中で700
℃で４時間処理すると3.2 ％の重量減少が認められたの
に対して、500 ℃で24時間処理した場合には1.1 ％に低
下し、400 ℃では、更に0.3 重量％に激減した。このた
め、熱処理温度の下限は400 ℃とした。一方、温度が高
過ぎても活性が低下した。これは、活性炭細孔の収縮
と、比表面積の低下によるものと考えられ、実験結果を
基に、上限を1200℃とした。尚実際のオゾン分解性能や
加熱費用から判断して、熱処理温度は、600℃〜1000℃
程度が好ましい。また熱処理する際の不活性ガスや還元
性ガスの種類は特に限定する必要はないが、一般的な窒
素や水素で十分である。また同一温度で比較すると、水
素や真空減圧下での処理の方が酸素官能基除去効率が高
いが、コストや安全性からすれば、窒素処理の方が有利
である。In the present invention, the heat treatment temperature should be 400 to 1200 ° C. If the temperature is too low, the rate of elimination of surface functional groups will be very low, and correspondingly a slight improvement in performance. For example, 700 in a nitrogen stream
A weight loss of 3.2% was observed when treated at 4 ° C for 4 hours, while it decreased to 1.1% when treated at 500 ° C for 24 hours and drastically reduced to 0.3% by weight at 400 ° C. Therefore, the lower limit of the heat treatment temperature was set to 400 ° C. On the other hand, the activity decreased even when the temperature was too high. This is considered to be due to the contraction of the activated carbon pores and the decrease in the specific surface area, and the upper limit was set to 1200 ° C based on the experimental results. Judging from the actual ozone decomposition performance and heating cost, the heat treatment temperature is 600 ℃ to 1000 ℃.
A degree is preferable. Further, the types of the inert gas and the reducing gas used for the heat treatment are not particularly limited, but general nitrogen or hydrogen is sufficient. Further, when compared at the same temperature, the treatment with hydrogen or under reduced pressure in vacuum has higher oxygen functional group removal efficiency, but the nitrogen treatment is more advantageous from the viewpoint of cost and safety.
【００１４】本発明においては、上記熱処理に先立ち、
酸化処理を施すことがオゾン分解能力を更に高める上で
有効であることは上述した通りであるが、この酸化処理
は酸素官能基を増加する方向に作用するものである。即
ち、上述の如く、炭素表面の酸素官能基が除去された位
置がオゾン分解の活性点になると考えれば、熱処理によ
ってそれを除去すれば活性は高まり、また酸化処理によ
って酸素官能基を増加させておいてから熱処理によって
それを除去すれば、より多くの活性点を発生させること
ができるので、有効と推定される。尚酸化処理とは、上
述の如く活性炭中の酸素濃度（すなわち酸素官能基濃
度）を増大させる操作であり、水蒸気や二酸化炭素によ
る賦活操作を十分に行なうことによって達成されるが、
より効果的には、空気中での熱処理、過酸化水素や硝酸
などの酸化性溶液への浸漬処理等の方法が採用できる。In the present invention, prior to the above heat treatment,
As described above, the oxidizing treatment is effective for further enhancing the ozone decomposing ability, but this oxidizing treatment acts to increase the oxygen functional groups. That is, as described above, assuming that the position where the oxygen functional group on the carbon surface is removed becomes the active site for ozonolysis, removing it by heat treatment increases the activity, and increasing the oxygen functional group by oxidation treatment. It is presumed to be effective, since it is possible to generate more active sites if it is removed by heat treatment after that. The oxidation treatment is an operation for increasing the oxygen concentration in the activated carbon (that is, the oxygen functional group concentration) as described above, and can be achieved by sufficiently performing the activation operation with steam or carbon dioxide.
More effectively, methods such as heat treatment in air and immersion treatment in an oxidizing solution such as hydrogen peroxide or nitric acid can be employed.
【００１５】また酸化処理を空気中の熱処理によって行
う場合には、温度が低すぎると効果がなく、高すぎると
炭素の減損が著しく（更には着火する）ため、300 〜60
0 ℃程度が好ましい。このとき温度によって処理時間を
変える必要があるが、減損が著しいと強度の低下が問題
になる。更に、酸化性溶液を用いる場合は、特に過酸化
水素は、排水処理も容易であるなどの特徴を有してい
る。When the oxidation treatment is carried out by heat treatment in air, if the temperature is too low, there is no effect, and if it is too high, the carbon loss is significant (further, ignition).
About 0 ° C is preferable. At this time, it is necessary to change the treatment time depending on the temperature, but if the loss is remarkable, the decrease in strength becomes a problem. Further, when an oxidizing solution is used, hydrogen peroxide has a characteristic that wastewater treatment is easy.
【００１６】以下本発明を実施例によって更に詳細に説
明するが、下記実施例は本発明を限定する性質のもので
はなく、前・後記の趣旨に徴して設計変更することはい
ずれも本発明の技術的範囲に含まれるものである。The present invention will be described in more detail with reference to the following examples. However, the following examples are not intended to limit the present invention, and any design changes made in view of the spirit of the preceding and the following will not be considered. It is included in the technical scope.
【００１７】[0017]
【実施例】細孔径約20Åにピークを有し、比表面積約80
0m2/g ，厚み１cmのハニカム状活性炭（やし殻炭化物を
ハニカム状に成形後、水蒸気雰囲気で賦活したもの）
に、下記表１に示す種々の熱処理（および酸化処理）を
施した後、オゾンを２０ppm(容量）含む空気を、空塔線
速度１m/s で流し、オゾン分解率の経時変化を測定し
た。その結果を表１に併記するが、本発明で規定する要
件を満足する実施例は、高いオゾン分解活性を有し、且
つ長寿命であることがわかる。[Example] A peak with a pore size of about 20Å and a specific surface area of about 80
0m 2 / g, 1cm thick honeycomb-like activated carbon (coconut shell carbide formed into honeycomb shape and activated in steam atmosphere)
After various heat treatments (and oxidation treatments) shown in Table 1 below, air containing 20 ppm (volume) of ozone was flowed at a superficial linear velocity of 1 m / s, and the change with time of the ozone decomposition rate was measured. The results are also shown in Table 1, and it can be seen that the examples satisfying the requirements defined in the present invention have high ozonolysis activity and long life.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【発明の効果】本発明は以上の様に構成されており、オ
ゾン分解活性を著しく高め、且つ長寿命のオゾン分解材
が得られた。EFFECTS OF THE INVENTION The present invention is constituted as described above, and an ozone decomposing material having a significantly increased ozone decomposing activity and a long life was obtained.
Claims (3)
ス雰囲気中または真空減圧下に、400 〜1200℃で熱処理
することを特徴とするオゾン分解材の製造方法。1. A method for producing an ozone decomposing material, which comprises subjecting activated carbon to heat treatment at 400 to 1200 ° C. in an atmosphere of an inert gas or a reducing gas or under reduced pressure in a vacuum.
する請求項１に記載の製造方法。2. The production method according to claim 1, wherein the activated carbon is oxidized before the heat treatment.
得られたものであるオゾン分解材。3. An ozone decomposing material which is obtained by the method according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4239747A JPH0692614A (en) | 1992-09-08 | 1992-09-08 | Ozone decomposer and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4239747A JPH0692614A (en) | 1992-09-08 | 1992-09-08 | Ozone decomposer and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0692614A true JPH0692614A (en) | 1994-04-05 |
Family
ID=17049332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4239747A Withdrawn JPH0692614A (en) | 1992-09-08 | 1992-09-08 | Ozone decomposer and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0692614A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000197981A (en) * | 1999-01-05 | 2000-07-18 | Isamu Miyamoto | Method and device for laser beam welding monitoring and laser beam welding machine |
| JP2002137911A (en) * | 2000-10-31 | 2002-05-14 | Matsushita Electric Ind Co Ltd | Method for producing activated carbon, activated carbon obtained thereby, and water purifier provided with activated carbon |
| JP2009149460A (en) * | 2007-12-19 | 2009-07-09 | Osaka Gas Co Ltd | Surface modification method of carbonaceous material, and carbonaceous material or activated carbon fiber |
| CN111128566A (en) * | 2019-12-19 | 2020-05-08 | 中国科学院化学研究所 | Method for removing metal ions in electrode material and supercapacitor |
-
1992
- 1992-09-08 JP JP4239747A patent/JPH0692614A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000197981A (en) * | 1999-01-05 | 2000-07-18 | Isamu Miyamoto | Method and device for laser beam welding monitoring and laser beam welding machine |
| JP2002137911A (en) * | 2000-10-31 | 2002-05-14 | Matsushita Electric Ind Co Ltd | Method for producing activated carbon, activated carbon obtained thereby, and water purifier provided with activated carbon |
| JP2009149460A (en) * | 2007-12-19 | 2009-07-09 | Osaka Gas Co Ltd | Surface modification method of carbonaceous material, and carbonaceous material or activated carbon fiber |
| CN111128566A (en) * | 2019-12-19 | 2020-05-08 | 中国科学院化学研究所 | Method for removing metal ions in electrode material and supercapacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19991130 |