JPS63190620A - Method of removing trichloroethylene out of gas containing trichloroethylene - Google Patents
Method of removing trichloroethylene out of gas containing trichloroethyleneInfo
- Publication number
- JPS63190620A JPS63190620A JP62023357A JP2335787A JPS63190620A JP S63190620 A JPS63190620 A JP S63190620A JP 62023357 A JP62023357 A JP 62023357A JP 2335787 A JP2335787 A JP 2335787A JP S63190620 A JPS63190620 A JP S63190620A
- Authority
- JP
- Japan
- Prior art keywords
- trichlorethylene
- gas
- c2hcl3
- ozone
- trichloroethylene
- 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.)
- Pending
Links
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 9
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 title 2
- 238000011282 treatment Methods 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 26
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract 3
- JBJWASZNUJCEKT-UHFFFAOYSA-M sodium;hydroxide;hydrate Chemical compound O.[OH-].[Na+] JBJWASZNUJCEKT-UHFFFAOYSA-M 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- -1 trichlorethylene gold Chemical compound 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004434 industrial solvent Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
本発明はトリクロロエチレンを含むガス、殊に廃ガス、
の処理方法に関し、さらに詳しくはガス中に含まれるト
リクロロエチレンを分解し、次いで吸着及び／または吸
収処理により除去する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas containing trichlorethylene, particularly a waste gas,
More specifically, it relates to a method for decomposing trichlorethylene contained in gas and then removing it by adsorption and/or absorption treatment.
従来の技術
トリクロロエチレン（Ｃ２ＨＣ１３）は、その不燃性及
びすぐれた溶剤特性から、工業的溶剤として油脂の抽出
、金属部材の脱脂、ト９ライクリーニング等に広く用い
られている。それらの工業昧程からトリクロロエチレン
が大気中へ漏出するの全防止する必要があることは、明
らかである。BACKGROUND OF THE INVENTION Trichlorethylene (C2HC13) is widely used as an industrial solvent for extraction of oils and fats, degreasing of metal parts, tri-cleaning, etc. due to its nonflammability and excellent solvent properties. It is clear that there is a need to prevent all leakage of trichlorethylene from these industrial facilities into the atmosphere.
トリクロロエチレンを含むガスの処理方法としては従来
より活性炭等の吸着剤によりトリクロロエチレンを吸着
し、しかる後脱着し回収する方法が行われている。しか
し、ガス中に含まれるトリクロロエチレン量が微少であ
る場合は吸着し、脱着して回収するよシも分解除去した
方がコストの而、特にエネルギーコストの面で有利とな
ることがある。A conventional method for treating gas containing trichlorethylene is to adsorb trichlorethylene using an adsorbent such as activated carbon, and then desorb and recover it. However, if the amount of trichlorethylene contained in the gas is very small, it may be more advantageous in terms of cost, especially energy cost, to decompose and remove it, rather than collecting it by adsorption and desorption.
トリクロロエチレンは空気中においてはＯｆ（ラジカル
及び太陽光によって分解することが知られているが、そ
の分解速度は比較的遅く太陽光１２時間照射の場合で、
存在量の約１７チが分解するのみである。従って、ＯＨ
ラジカルによる分解は工業的には適用しにくい。また空
気中でトリクロロエチレンを熱分解することもできるが
、この場合は高温が必要である上に完全に分解するには
長時間を要する。さらにエネルギーの非常に大きな熱源
がある場合には爆発を起す危険がある。Trichlorethylene is known to be decomposed by radicals and sunlight in the air, but its decomposition rate is relatively slow when exposed to sunlight for 12 hours.
Only about 17 of the abundance is degraded. Therefore, OH
Decomposition by radicals is difficult to apply industrially. It is also possible to thermally decompose trichlorethylene in air, but in this case, high temperatures are required and it takes a long time to completely decompose. Furthermore, if there is a heat source with a very large amount of energy, there is a risk of an explosion.
発明が解決しようとする問題点
本発明の目的は、ガス中に含まれるトリクロロエチレン
を効率良く分解し、分解生成物を吸収及び／または吸着
除去する方法を提供することにある。本発明の目的は、
ガス中に含まれるトリクロロエチレンを低温でオゾンし
及び酸素によシ酸化分解し、しかる後にこのガスを吸着
及び／または吸収処理に付してトリクロロエチレンが含
まれないいガスを得ることにある。Problems to be Solved by the Invention An object of the present invention is to provide a method for efficiently decomposing trichlorethylene contained in gas and removing the decomposition products by absorption and/or adsorption. The purpose of the present invention is to
The purpose of this method is to ozone the trichlorethylene contained in the gas at low temperatures and oxidatively decompose it with oxygen, and then subject this gas to adsorption and/or absorption treatment to obtain a gas that does not contain trichlorethylene.
本発明の一目的はガス中に微量に含まれるトリクロロエ
チレンを効率良く経済的に除去することにある。One object of the present invention is to efficiently and economically remove trichlorethylene contained in trace amounts in gas.
問題を解決するための手段
かくして本発明は、トリクロロエチレンを含むガスを酸
素の存在下にオゾンで処理してトリクロロエチレンを酸
化分解し、しかる後にそのガスをさらに吸収及び／また
は吸着処理に付すことを特徴とするトリクロロエチレン
を含むガスからトリクロロエチレンを除去する方法上提
供する。Means for Solving the Problem The invention is thus characterized in that a gas containing trichlorethylene is treated with ozone in the presence of oxygen to oxidatively decompose the trichlorethylene, and then the gas is subjected to a further absorption and/or adsorption treatment. A method for removing trichlorethylene from a gas containing trichlorethylene is provided.
オゾンは、オゾン発生器により空気あるいは酸素の一部
をオゾン化する゛ことにより得、トリクロロエチレン金
含むガスに混合する。酸素は、トリクロロエチレンを含
むガスが空気である場合は、通常必要量以上の酸素が存
在するので混合する必要はないが、混合する必要がある
場合はオゾンと共に混合するのが好ましい。Ozone is obtained by ozonizing a portion of air or oxygen using an ozone generator, and is mixed with trichlorethylene gold-containing gas. When the gas containing trichlorethylene is air, there is usually more than the required amount of oxygen, so there is no need to mix oxygen, but if mixing is necessary, it is preferably mixed with ozone.
混合するオゾンの量はトリクロロエチレン１モルニ対し
て工／、。〜２モルであることが好ましく、１／１゜モ
ル未満ではトリクロロエチレンの分解速度が遅くなり、
好ましくない。また酸素はトリクロロエチレン１モルに
対して５モル以上存在すれば良い。The amount of ozone to be mixed is 1 mole of trichlorethylene. The amount is preferably ~2 mol, and if it is less than 1/1 mol, the decomposition rate of trichlorethylene will be slow;
Undesirable. Further, oxygen may be present in an amount of 5 moles or more per mole of trichlorethylene.
分解温度は６０〜１１０℃、特に７０〜９０’Ｃが好ま
しく、印℃未満では分解速度が遅く、ま７？１．ｌｌＯ
’ｃ以上ではオゾンの反応効率が低くなり、いずれも好
ましくない。接触時間はトリクロロエチレン、オゾン及
び酸素の濃度、温度によるが１２０秒あれば充分である
。The decomposition temperature is preferably 60 to 110°C, particularly 70 to 90'C; below the mark, the decomposition rate is slow; llO
If the temperature exceeds 'c', the reaction efficiency of ozone decreases, and both are unfavorable. The contact time depends on the concentrations of trichlorethylene, ozone and oxygen, and temperature, but 120 seconds is sufficient.
広範囲の濃度のトリクロロエチレンを分解できるが、ガ
ス中に含まれるトリクロロエチレン濃度が高い場合は予
め活性炭吸着等により回収して処理量を減少させた方が
経済的に有利である。従って本発明を実施するのはトリ
クロロチレン濃度が２％以下、特に好ましいのは５０〜
５０００ Ｐ程度である場合が好ましい。Although it is possible to decompose trichlorethylene in a wide range of concentrations, if the concentration of trichlorethylene contained in the gas is high, it is economically advantageous to recover it by activated carbon adsorption or the like in advance to reduce the amount to be processed. Therefore, in carrying out the present invention, the trichlorothylene concentration is 2% or less, particularly preferably 50 to 50%.
It is preferable that it is about 5000 P.
酸化分解処理後のガス中に含まれる分解生成物として代
表的な化学種は、Ｈ（Ｊ、ホスゲン、ＣＯ□。Typical chemical species as decomposition products contained in the gas after oxidative decomposition treatment are H(J, phosgene, CO□.
Ｅ（２０等であり、極微量のＣｌ２Ｏ，Ｃ１２等が検出
されることもある。E(20, etc.), and trace amounts of Cl2O, C12, etc. may be detected.
酸化分解処理後のガスは、吸収剤及び／または吸着剤と
接触させ、分解生成物を除去する。吸収または吸着に使
用する薬剤としては、水酸化ナトリウム、水酸化カリウ
ム、炭酸ナトリウム、炭酸カリウム等のアルカリ剤の固
体床もしくは水溶液、石灰乳等のスラリー、あるいはソ
ーダライム、活性炭等が具体例として挙げられる。The gas after the oxidative decomposition treatment is brought into contact with an absorbent and/or adsorbent to remove decomposition products. Examples of agents used for absorption or adsorption include solid beds or aqueous solutions of alkaline agents such as sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, slurries such as milk of lime, or soda lime and activated carbon. It will be done.
実施例
以下、実施例及び比較例により本発明を具体的に説明す
る。EXAMPLES Hereinafter, the present invention will be specifically explained using Examples and Comparative Examples.
実施例１
トリクロロエチレンｋ １．８ ｖｏｌ ％含んだ空気
をテフロン製の反応器（内径８ＲＩ、長さ６ｒｒＬ）に
、滞留時間３０〜４０秒となる流速で供給し、オゾンを
０．４９７ｈで混合した。反応器は閉℃に保ち、処理ガ
スは１０％水酸化ナトリウム水溶液で吸収処理した。Example 1 Air containing 1.8 vol % of trichlorethylene k was supplied to a Teflon reactor (inner diameter 8RI, length 6rrL) at a flow rate such that the residence time was 30 to 40 seconds, and ozone was mixed in for 0.497 hours. . The reactor was kept closed at °C, and the treated gas was absorbed with a 10% aqueous sodium hydroxide solution.
実施例２
実施例１で用いた反応器にトリクロロエチレンを０，２
ｖｏ１％含有し念空気とオゾンｏ、ｘｇ／ｈを、滞留
時間３０〜４０秒となる様に供給し、温度を（資）℃に
保った。処理ガスは５チ水酸化ナトリクム水溶液で吸収
処理した。Example 2 Trichlorethylene was added to the reactor used in Example 1 at 0.2
Air containing 1% VO and ozone xg/h were supplied so that the residence time was 30 to 40 seconds, and the temperature was maintained at ℃. The treated gas was absorbed and treated with an aqueous solution of pentate sodium hydroxide.
実施例３
パイレックス製反応器（内径４０咽、長さ４００ ｔｒ
ｙ ）にトリクロロエチレンｆ １．Ｏｖｏｗ ％ 含
む空気とオゾンｏ、６ｇ／ｈ や滞留時間３０〜４０
秒で供給し、温度を閉℃に保った。処理ガスは１０％水
酸化ナトリウム水溶液で吸収処理した。Example 3 Pyrex reactor (inner diameter 40 mm, length 400 tr
y) and trichlorethylene f1. Ovow % Containing air and ozone o, 6g/h and residence time 30-40
The temperature was kept at 0°C. The treated gas was absorbed and treated with a 10% aqueous sodium hydroxide solution.
実施例４
トリクロロエチレンｋ Ｏ，０５ｖｏｌ ％含有した空
気をテフロン製反応器（内径８咽、長さ２ｍ）に滞留時
間３０〜４０秒で供給し、オゾン６ｏ、ｘ９／ｈで混合
した。温度を関℃に保った。処理ガスは５％水酸化ナト
リウム水溶液に吸収処理した。Example 4 Air containing 05 vol % of trichlorethylene k was supplied to a Teflon reactor (inner diameter 8 mm, length 2 m) for a residence time of 30 to 40 seconds, and mixed with ozone at 6 o, x9/h. The temperature was maintained at 30°F. The treated gas was absorbed into a 5% aqueous sodium hydroxide solution.
比較例１
実施例１の操作を繰り返えしたが、オゾンの混合を省略
した。Comparative Example 1 The operation of Example 1 was repeated, but ozone mixing was omitted.
比較例２
実施例３で用いた反応器にトリクロロエチレンをｌ、Ｑ
ｖｏｌチ含む窒素とオゾン０．６ｇ／ｈｔ滞留時間３０
〜４０秒で供給し、温度全開℃に保った。処理ガスは１
０％ 水酸化ナトリウム水溶液で吸収処理した。Comparative Example 2 Trichlorethylene was added to the reactor used in Example 3.
Nitrogen and ozone containing vol. 0.6g/h Residence time 30
It was fed for ~40 seconds and the temperature was kept at full temperature. Processing gas is 1
Absorption treatment was carried out with 0% aqueous sodium hydroxide solution.
以上の実施例１〜４及び比較例１〜２の結果を。The results of Examples 1 to 4 and Comparative Examples 1 to 2 above.
下表に示す。これらの結果の比較より、本発明の効果は
明らかである。Shown in the table below. From a comparison of these results, the effects of the present invention are clear.
Claims (5)
オゾンで処理してトリクロロエチレンを酸化分解し、し
かる後にそのガスをさらに吸収及び／または吸着処理に
付すことを特徴とするトリクロロエチレンを含むガスか
らトリクロロエチレンを除去する方法。(1) Trichlorethylene is removed from a trichlorethylene-containing gas by treating the trichlorethylene-containing gas with ozone in the presence of oxygen to oxidize and decompose the trichlorethylene, and then subjecting the gas to further absorption and/or adsorption treatment. How to remove.
に対して各々１／１０〜２モル及び５モル以上である特
許請求の範囲第１項に記載の方法。(2) The method according to claim 1, wherein the amounts of ozone and oxygen are 1/10 to 2 mol and 5 mol or more, respectively, per 1 mol of trichlorethylene.
求の範囲第１または２項に記載の方法。(3) The method according to claim 1 or 2, wherein the oxidative decomposition treatment temperature is 60 to 110°C.
度が２容量％以下である特許請求の範囲第１〜３項のい
ずれかに記載の方法。(4) The method according to any one of claims 1 to 3, wherein the trichlorethylene concentration in the gas before the oxidative decomposition treatment is 2% by volume or less.
の範囲第１〜４項のいずれかに記載の方法。(5) The method according to any one of claims 1 to 4, wherein the absorption treatment is performed using an alkaline agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62023357A JPS63190620A (en) | 1987-02-03 | 1987-02-03 | Method of removing trichloroethylene out of gas containing trichloroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62023357A JPS63190620A (en) | 1987-02-03 | 1987-02-03 | Method of removing trichloroethylene out of gas containing trichloroethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63190620A true JPS63190620A (en) | 1988-08-08 |
Family
ID=12108320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62023357A Pending JPS63190620A (en) | 1987-02-03 | 1987-02-03 | Method of removing trichloroethylene out of gas containing trichloroethylene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63190620A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115096A (en) * | 1988-10-24 | 1990-04-27 | Ultrox Internatl | Decomposition of volatile organohalogen compound contained in gas and aqueous solution |
| US6503469B2 (en) * | 1998-06-22 | 2003-01-07 | Mitsubishi Heavy Industries, Ltd. | Method for processing polluted fluid containing pollutants |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5110174A (en) * | 1974-07-15 | 1976-01-27 | Sumitomo Chemical Co | Haigasuchuno harogenkafuhowatankasuisono jokyoho |
-
1987
- 1987-02-03 JP JP62023357A patent/JPS63190620A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5110174A (en) * | 1974-07-15 | 1976-01-27 | Sumitomo Chemical Co | Haigasuchuno harogenkafuhowatankasuisono jokyoho |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115096A (en) * | 1988-10-24 | 1990-04-27 | Ultrox Internatl | Decomposition of volatile organohalogen compound contained in gas and aqueous solution |
| US6503469B2 (en) * | 1998-06-22 | 2003-01-07 | Mitsubishi Heavy Industries, Ltd. | Method for processing polluted fluid containing pollutants |
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