JPH0258967B2 - - Google Patents
Info
- Publication number
- JPH0258967B2 JPH0258967B2 JP59075510A JP7551084A JPH0258967B2 JP H0258967 B2 JPH0258967 B2 JP H0258967B2 JP 59075510 A JP59075510 A JP 59075510A JP 7551084 A JP7551084 A JP 7551084A JP H0258967 B2 JPH0258967 B2 JP H0258967B2
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- porous body
- filter
- activated carbon
- ozone decomposition
- 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 - Lifetime
Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 34
- 238000000354 decomposition reaction Methods 0.000 claims description 18
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 10
- 150000001639 boron compounds Chemical class 0.000 claims description 10
- 229910021538 borax Inorganic materials 0.000 claims description 7
- 239000004328 sodium tetraborate Substances 0.000 claims description 7
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 229920003043 Cellulose fiber Polymers 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005183 environmental health Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002973 irritant agent Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002341 toxic gas Substances 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
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明はオゾン分解フイルター、特に、オゾン
を長期間にわたつて効果的に分解除去しうるフイ
ルターに関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an ozone decomposition filter, and particularly to a filter that can effectively decompose and remove ozone over a long period of time.
（従来技術）
オゾンは刺激性の有毒ガスであり、これが大気
中に発生することは環境衛生上も好ましいことで
はない。このオゾンは、高電圧のかかる電気製品
からのコロナ放電により、あるいは、紫外線、Ｘ
線、陰極線などの放射線が酸素分子に反応して発
生する。静電複写機では、その複写プロセスの中
で行われるコロナ放電によつて空気中の酸素分子
から多量のオゾンが生成され、これが複写機内に
設けられた排気部等から機外へ排出されて、複写
機の置かれている室内の空気を汚染する。したが
つてこの静電複写機のようなオゾン発生源となる
機器や装置類には、その中で生成されるオゾンを
できるだけもとの酸素分子に分解させるフイルタ
ーなどが設けられねばならない。オゾンを分解除
去するフイルターとしては、活性炭を主体とする
もの、多孔体表面に酸化金属触媒をコーテイング
したもの、あるいは還元性物質を主体とするもの
が知られている。例えば、独国特許公開公報第
3217299号には、活性炭繊維を粉砕しこれに澱粉
を加えスラリーにしてのち加熱・冷却し、それを
発泡ウレタンに浸漬し、乾燥して得られる50wt
％の活性炭を含むフイルターが開示されている。
特開昭57−50527号公報や特開昭54−59364号公報
には、活性炭表面にマンガン酸化物と銅酸化物と
をコーテイングさせたり、あるいは金属キレート
化合物をコーテイングさせて得られるフイルター
が開示されている。特開昭57−30533号公報は、
銅酸化物を担持させた活性炭を多数のハニカム状
孔を設けたアルミナ板に付着させたフイルター
が、そして米国特許明細書第4200607号には耐
熱・軽量の多孔のフイルムにMnO2、CeO2およ
びCr2O3をコーテイングしたフイルターが開示さ
れている。また、特開昭56−115622号公報、米国
特許明細書第4261963号、米国特許明細書第
4184983号などは、アルミナ触媒床に銀をコーテ
イングしたフイルター、ZnO2にMnO2をコーテ
イングしたフイルター、無機担体に第８属の金属
や金属酸化物をコーテイングしたフイルターを開
示している。さらに、独国特許公開公報第
3029948号はオゾン分解に白金を用いることを提
案している。(Prior Art) Ozone is an irritating and toxic gas, and its generation in the atmosphere is not desirable from the standpoint of environmental health. This ozone is produced by corona discharge from high-voltage electrical products, ultraviolet rays,
Radiation such as rays and cathode rays is generated by reacting with oxygen molecules. In an electrostatic copying machine, a large amount of ozone is generated from oxygen molecules in the air due to corona discharge during the copying process, and this is exhausted outside the machine from an exhaust port installed inside the copying machine. It pollutes the air in the room where the copy machine is located. Therefore, equipment and devices that generate ozone, such as electrostatic copying machines, must be equipped with a filter or the like to decompose the ozone generated therein into its original oxygen molecules as much as possible. As filters for decomposing and removing ozone, there are known filters based on activated carbon, filters coated with a metal oxide catalyst on the surface of a porous body, and filters based on reducing substances. For example, German Patent Application No.
No. 3217299 describes a 50wt product obtained by crushing activated carbon fibers, adding starch to the slurry, heating and cooling it, immersing it in urethane foam, and drying it.
% activated carbon is disclosed.
JP-A-57-50527 and JP-A-54-59364 disclose filters obtained by coating the surface of activated carbon with manganese oxide and copper oxide, or by coating the surface with a metal chelate compound. ing. Japanese Patent Application Laid-open No. 57-30533 is
In US Pat. No. 4,200,607, a heat-resistant and lightweight porous film is coated with MnO 2 , CeO 2 and A filter coated with Cr 2 O 3 is disclosed. Also, Japanese Patent Application Laid-Open No. 115622/1983, US Patent Specification No. 4261963, US Patent Specification No.
No. 4184983 discloses a filter in which an alumina catalyst bed is coated with silver, a filter in which ZnO 2 is coated with MnO 2 , and a filter in which an inorganic carrier is coated with a Group 8 metal or metal oxide. Additionally, German Patent Publication No.
No. 3029948 proposes the use of platinum for ozone decomposition.
上記オゾン分解フイルターのうち、活性炭や活
性炭繊維は、その活性表面が空気中の塵あいの吸
着や機械油の飛散による吸着などが原因で、比較
的短時間に失われ易いという欠点を有する。しか
も、オゾンとの反応の結果、それ自身の温度が上
昇して吸着能が低下するというオゾン分解触媒と
しての致命的な欠点を有する。 Among the ozone decomposition filters, activated carbon and activated carbon fibers have the disadvantage that their active surfaces tend to be lost in a relatively short time due to adsorption of dust particles in the air or adsorption due to scattering of machine oil. Furthermore, as a result of the reaction with ozone, its own temperature rises and its adsorption capacity decreases, which is a fatal drawback as an ozone decomposition catalyst.
多孔体に酸化金属触媒をコーテイングした上記
オゾン分解フイルターにおいては、そのコーテイ
ング処理が技術的に複雑である。しかも多孔体の
通気抵抗が大きいため、多孔体表面にたとえ理想
的に酸化金属触媒をコーテイングし得たとしても
その内面はほとんど利用され得ない。 In the above ozone decomposition filter in which a porous body is coated with a metal oxide catalyst, the coating process is technically complex. Moreover, since the porous body has a large ventilation resistance, even if the surface of the porous body could be ideally coated with a metal oxide catalyst, the inner surface of the porous body could hardly be utilized.
また、白金などの還元性物質で構成される上記
オゾン分解フイルターにおいては、オゾンを長期
にわたつて効率よく分解除去するためには還元物
質を多量用いねばならず、高価になるとともにコ
ンパクトなフイルターを作製することが不可能で
あり実用的ではない。 Furthermore, in the above ozone decomposition filter made of a reducing substance such as platinum, in order to efficiently decompose and remove ozone over a long period of time, a large amount of the reducing substance must be used, making it expensive and requiring a compact filter. It is impossible and impractical to produce.
（発明の目的）
本発明の目的は、オゾンを長期にわたつて安定
して効率よく分解除去しうるフイルターを提供す
ることにある。本発明の他の目的は、容器かつ安
価に製作されうるオゾン分解フイルターを提供す
ることにある。本発明のさらに他の目的は、通気
抵抗の小さいオゾン分解フイルターを提供するこ
とにある。(Object of the Invention) An object of the present invention is to provide a filter that can stably and efficiently decompose and remove ozone over a long period of time. Another object of the present invention is to provide an ozone decomposition filter that can be manufactured in a container and at low cost. Still another object of the present invention is to provide an ozone decomposition filter with low ventilation resistance.
（発明の構成）
本発明は、オゾンは水溶液中では空気中におけ
るよりも速やかに分解されるが無機酸の存在下で
は極めて安定であること、および例外的にほう酸
もしくはほう砂溶液における分解が著しいことな
どの知見にもとづいて完成された。それゆえ、本
発明のオゾン分解フイルターは、多孔体にほう素
化合物を担持せしめてなり、そのことにより上記
目的が達成される。(Structure of the Invention) The present invention is based on the fact that ozone decomposes more rapidly in an aqueous solution than in air, but is extremely stable in the presence of an inorganic acid, and that ozone decomposes exceptionally in a solution of boric acid or borax. It was completed based on knowledge such as that. Therefore, the ozone decomposition filter of the present invention has a porous body supporting a boron compound, thereby achieving the above object.
多孔体はセルロース繊維などでなり、ろ紙が特
に好ましい。ほう素化合物としては、例えば、ほ
う酸、ほう砂などが用いられる。本発明ではさら
に活性炭を多孔体に担持させたものが効果があ
り、活性炭としては粉末活性炭もしくは活性炭繊
維が用いられる。 The porous body is made of cellulose fiber or the like, and filter paper is particularly preferable. As the boron compound, for example, boric acid, borax, etc. are used. In the present invention, activated carbon supported on a porous body is also effective, and the activated carbon used is powdered activated carbon or activated carbon fibers.
これらほう素化合物を多孔体に担持させるに
は、ほう酸やほう砂の水溶液中に多孔体を浸漬し
多孔体にほう酸やほう砂を含浸させこれを乾燥す
ることにより行われる。アルカリはオゾン分解反
応を促進させる作用を有するため、これらほう酸
水溶液やほう砂水溶液をアルカリ性にしこれに多
孔体を浸漬すること、もしくは多孔体をこれらほ
う素化合物水溶液処理する前もしくは後にアルカ
リ処理することが推奨される。多孔体の種類、そ
の開口度、ほう素化合物の濃度、粉末活性炭の粒
度、アルカリ度などには格別な制限はなく、フイ
ルター調製プロセスの効率度、得られるフイルタ
ーの設置場所、分解除去すべきオゾン量などにも
とづいて適宜設定される。多孔体として用いられ
るろ紙は格別である必要はなく、例えば、実験室
などで通常用いられる定量用もしくは定性用ろ紙
でもよい。その多孔度は使用目的によつて適当に
選択される。ほう素化合物の濃度は、通常、0.5
重量％〜20重量％、好ましくは２〜８重量％に設
定される。活性炭の粒度は、通常、平均粒径が
2μｍ〜20μｍ、好ましくは5μｍ〜15μｍである。
アルカリ度は、多孔体のほう素化合物水溶液処理
をにらみ合わせて適宜設定されるべきものであ
る。 These boron compounds can be supported on the porous body by immersing the porous body in an aqueous solution of boric acid or borax, impregnating the porous body with boric acid or borax, and then drying the porous body. Since alkali has the effect of accelerating the ozone decomposition reaction, it is necessary to make the boric acid aqueous solution or borax aqueous solution alkaline and immerse the porous body in it, or to treat the porous body with an alkali before or after treating the porous body with the boron compound aqueous solution. is recommended. There are no particular restrictions on the type of porous material, its opening degree, concentration of boron compounds, particle size of powdered activated carbon, alkalinity, etc., and there are no particular restrictions on the efficiency of the filter preparation process, the installation location of the resulting filter, and the ozone to be decomposed and removed. It is set appropriately based on the amount, etc. The filter paper used as the porous body does not need to be special, and may be, for example, a quantitative or qualitative filter paper commonly used in laboratories. The porosity is appropriately selected depending on the intended use. The concentration of boron compounds is usually 0.5
It is set to 20% by weight, preferably 2 to 8% by weight. The average particle size of activated carbon is usually
It is 2 μm to 20 μm, preferably 5 μm to 15 μm.
The alkalinity should be appropriately set in consideration of the boron compound aqueous solution treatment of the porous body.
（実施例） 以下に本発明を実施例について述べる。(Example) The present invention will be described below with reference to examples.
実施例 １
１号ろ紙をほう酸の５％水溶液に浸漬し、これ
を乾燥してほう酸処理紙を得た。これを１cm幅に
切断しひだ状にして巻いた。これを内径２cmのス
テンレス管中に挿入してオゾン分解フイルターを
得た。この系に1.2〜1.5ppmのオゾンを0.2〜0.5
ｍ／secの速さで通過させ、出口側のオゾンの濃
度を測定した。出口側の当初のオゾン濃度は
0.01ppmであり、120時間後は0.2ppmであつた。Example 1 No. 1 filter paper was immersed in a 5% aqueous solution of boric acid and dried to obtain boric acid treated paper. This was cut into 1 cm wide pieces, pleated and rolled. This was inserted into a stainless steel tube with an inner diameter of 2 cm to obtain an ozone decomposition filter. Add 0.2 to 0.5 ppm of ozone to this system.
It was passed through at a speed of m/sec, and the ozone concentration on the outlet side was measured. The initial ozone concentration on the outlet side is
It was 0.01 ppm, and after 120 hours it was 0.2 ppm.
実施例 ２
１号ろ紙をほう砂の５％水溶液に浸漬し、乾燥
後、実施例１と同様に１cm幅に切断しひだ状にし
て巻いた。これを内径２cmのステンレス管に挿入
してオゾン分解フイルターを得た。この系に1.2
〜1.5ppmのオゾンを0.2〜0.5ｍ／secの速さで通
過させ、出口側のオゾンの濃度を測定した。出口
側の当初のオゾン濃度は0.01ppmであり、120時
間後は0.1〜0.2ppmであつた。Example 2 No. 1 filter paper was immersed in a 5% aqueous solution of borax, dried, and then cut into 1 cm widths in the same manner as in Example 1, pleated, and rolled. This was inserted into a stainless steel tube with an inner diameter of 2 cm to obtain an ozone decomposition filter. 1.2 for this system
~1.5 ppm of ozone was passed through at a speed of 0.2 to 0.5 m/sec, and the ozone concentration on the outlet side was measured. The initial ozone concentration on the outlet side was 0.01 ppm, and after 120 hours it was 0.1-0.2 ppm.
実施例 ３
１号ろ紙を平均粒径10μｍの粉末活性炭（１
％）のポリアクリル酸ナトリウム２％水溶液およ
びほう酸の５％水溶液に浸漬し、乾燥して活性
炭・ほう酸処理紙を得た。これを実施例１と同様
に１cm幅に切断しひだ状にして巻き、内径２cmの
ステンレス管に挿入した。得られたオゾン分解フ
イルターに1.2〜1.5ppmのオゾンを0.2〜0.5ｍ／
secの速さで通過させ、出口側のオゾンの濃度を
測定した。出口側の当初のオゾン濃度は0.01ppm
であり、120時間後は0.02ppmであつた。Example 3 No. 1 filter paper was coated with powdered activated carbon (1
%) in a 2% aqueous solution of sodium polyacrylate and a 5% aqueous solution of boric acid, and dried to obtain activated carbon/boric acid treated paper. As in Example 1, this was cut into 1 cm width, folded and rolled, and inserted into a stainless steel tube with an inner diameter of 2 cm. 1.2 to 1.5 ppm of ozone is applied to the obtained ozone decomposition filter at a rate of 0.2 to 0.5 m/
The ozone concentration was measured at the outlet side. The initial ozone concentration on the outlet side is 0.01ppm
After 120 hours, it was 0.02 ppm.
比較例
粒径１mmの活性炭をステンレス製金網より成る
容器に充填する、その前面に亜鉛製繊維（太さ約
250μｍ）を0.2ｇ／cm2になるようにセツトする。
この系に0.5ppmのオゾンを0.2〜0.5ｍ／secの速
さで通過させた。120時間では亜鉛製繊維に顕著
な酸化は見られなかつたが500時間では亜鉛製繊
維の欠落が認められた。Comparative example: Activated carbon with a particle size of 1 mm is filled into a container made of stainless steel wire mesh, and zinc fibers (approximately
250μm) to be 0.2g/cm 2 .
Ozone at a concentration of 0.5 ppm was passed through this system at a speed of 0.2 to 0.5 m/sec. No significant oxidation was observed in the zinc fibers after 120 hours, but some loss of zinc fibers was observed after 500 hours.
（発明の効果）
本発明のフイルターによれば、このように、有
害な発生オゾンを極めて効果的に分解除去するこ
とができ、かつその効果は長期間にわたつて持続
しうる。しかも、そのフイルターはろ紙などの多
孔体をほう素化合物処理して得られるため、製作
が著しく容易である。(Effects of the Invention) According to the filter of the present invention, the harmful generated ozone can be decomposed and removed very effectively, and the effect can be maintained for a long period of time. Furthermore, since the filter is obtained by treating a porous material such as filter paper with a boron compound, it is extremely easy to manufacture.
Claims (1)
分解フイルター。 ２ 前記多孔体がセルロース繊維でなる特許請求
の範囲第１項に記載のオゾン分解フイルター。 ３ 前記多孔体がろ紙である特許請求の範囲第１
項もしくは第２項に記載のオゾン分解フイルタ
ー。 ４ 前記多孔体が粉末活性炭もしくは活性炭繊維
が担持せしめられたものからなる特許請求の範囲
第１項、第２項もしくは第３項に記載のオゾン分
解フイルター。 ５ 前記ほう素化合物がほう酸もしくはほう砂で
ある特許請求の範囲第１項、第２項、第３項もし
くは第４項に記載のオゾン分解フイルター。[Claims] 1. An ozone decomposition filter in which a porous body supports a boron compound. 2. The ozone decomposition filter according to claim 1, wherein the porous body is made of cellulose fiber. 3. Claim 1, wherein the porous body is a filter paper.
The ozone decomposition filter according to item 1 or 2. 4. The ozone decomposition filter according to claim 1, 2 or 3, wherein the porous body supports powdered activated carbon or activated carbon fibers. 5. The ozone decomposition filter according to claim 1, 2, 3, or 4, wherein the boron compound is boric acid or borax.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59075510A JPS60220128A (en) | 1984-04-13 | 1984-04-13 | Ozone decomposition filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59075510A JPS60220128A (en) | 1984-04-13 | 1984-04-13 | Ozone decomposition filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60220128A JPS60220128A (en) | 1985-11-02 |
| JPH0258967B2 true JPH0258967B2 (en) | 1990-12-11 |
Family
ID=13578304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59075510A Granted JPS60220128A (en) | 1984-04-13 | 1984-04-13 | Ozone decomposition filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60220128A (en) |
-
1984
- 1984-04-13 JP JP59075510A patent/JPS60220128A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60220128A (en) | 1985-11-02 |
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