JPH0336598B2 - - Google Patents
Info
- Publication number
- JPH0336598B2 JPH0336598B2 JP4961389A JP4961389A JPH0336598B2 JP H0336598 B2 JPH0336598 B2 JP H0336598B2 JP 4961389 A JP4961389 A JP 4961389A JP 4961389 A JP4961389 A JP 4961389A JP H0336598 B2 JPH0336598 B2 JP H0336598B2
- Authority
- JP
- Japan
- Prior art keywords
- trichlorethylene
- concentration
- permanganate
- present
- 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
Links
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 19
- 239000002351 wastewater Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 229950011008 tetrachloroethylene Drugs 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- OQVYMXCRDHDTTH-UHFFFAOYSA-N 4-(diethoxyphosphorylmethyl)-2-[4-(diethoxyphosphorylmethyl)pyridin-2-yl]pyridine Chemical compound CCOP(=O)(OCC)CC1=CC=NC(C=2N=CC=C(CP(=O)(OCC)OCC)C=2)=C1 OQVYMXCRDHDTTH-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、半導体産業、ドライクリーニング
業、金属部品製造業などで部品洗浄に使用したト
リクロロエチレンやテトラクロロエチレン（以
下、トリクロロエチレン等と記す）を回収する
際、油水分離装置等から排出されるトリクロロエ
チレン等含有排水を処理し無害化するために用い
られる。[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for recovering trichlorethylene and tetrachlorethylene (hereinafter referred to as trichlorethylene, etc.) used for cleaning parts in the semiconductor industry, dry cleaning industry, metal parts manufacturing industry, etc. It is used to treat and render harmless wastewater containing trichlorethylene etc. discharged from oil-water separators.
［従来技術およびその問題点］
排水中のトリクロロエチレン等の分解技術とし
ては、従来よりオゾン酸化法、紫外線分解法、フ
エントン試薬による酸化法などある。しかし、オ
ゾン酸化、紫外線分解はこれら化学物質に対して
は不確実であり、フエントン酸化では多量の試薬
及び加熱を必要とするためコストがかさむ等の問
題があり、安価で確実な分解法の開発が望まれて
いた。[Prior art and its problems] Conventional techniques for decomposing trichlorethylene and the like in wastewater include ozone oxidation, ultraviolet decomposition, and oxidation using Fuenton's reagent. However, ozone oxidation and ultraviolet decomposition are uncertain for these chemical substances, and Fuenton oxidation requires a large amount of reagents and heating, which increases costs. was desired.
［発明の課題］
本発明は、過マンガン酸塩を必要量排水に加え
ることにより、水溶液系で室温においてトリクロ
ロエチレン等を選択的に酸化分解する方法であ
る。従つて、本発明の目的は、従来の方法の問題
点を解決できるトリクロロエチレン等含有排水の
処理方法を提供することにある。[Problems to be solved by the invention] The present invention is a method for selectively oxidizing and decomposing trichlorethylene and the like at room temperature in an aqueous solution system by adding a required amount of permanganate to waste water. Therefore, an object of the present invention is to provide a method for treating wastewater containing trichlorethylene, etc., which can solve the problems of conventional methods.
［課題を解決するための手段］
本発明は、トリクロロエチレン等含有排水（酸
性であればPH６〜９の範囲に中和しておく）に過
マンガン酸塩を加え、次式の反応によりトリクロ
ロエチレンを酸化分解する方法である。[Means for solving the problem] The present invention adds permanganate to wastewater containing trichlorethylene, etc. (if acidic, neutralize it to a pH range of 6 to 9), and oxidizes trichlorethylene by the reaction of the following formula. This is a method of decomposition.
C2HCl3＋2MnO4 -
→2CO2＋3Cl-＋H+＋2MnO2↓
本反応はすみやかに進行し、過マンガン酸塩濃
度0.01Mの時、25℃、２時間でトリクロロエチレ
ンを99％分解できる。炭素−炭素不飽和結合を持
たないアルコール、ケトン、糖等は中性では過マ
ンガン酸塩と反応せず処理を妨害しない。未反応
の過マンガン酸は亜硫酸塩を加えることにより、
次式のように二酸化マンガンとして分離・回収で
きる。（残存Mn濃度0.1ppm以下）
2MnO4＋3SO3 2-＋2H+
→3SO4 2-＋H2O＋2MnO2↓
［実施例］
本発明の実施例を図面（第１図）に基づいて説
明する。 C 2 HCl 3 +2MnO 4 - →2CO 2 +3Cl - +H + +2MnO 2 ↓ This reaction proceeds quickly, and when the permanganate concentration is 0.01M, 99% of trichlorethylene can be decomposed in 2 hours at 25°C. Alcohols, ketones, sugars, etc. that do not have carbon-carbon unsaturated bonds do not react with permanganate in neutral conditions and do not interfere with the treatment. Unreacted permanganate can be removed by adding sulfite.
It can be separated and recovered as manganese dioxide as shown in the following formula. (Residual Mn concentration 0.1 ppm or less) 2MnO 4 +3SO 3 2- +2H + →3SO 4 2- +H 2 O + 2MnO 2 ↓ [Example] An example of the present invention will be described based on the drawings (Fig. 1).
トリクロロエチレンを含有する排水Ａm3を処理
槽にとり、過マンガン酸カリウム溶液をＢm3加え
混合する。冬期は反応槽を25℃程度に保温する
か、処理時間を長くとる必要がある。放置すれば
分解は完了する。その後、過マンガン酸の赤紫色
が消えるまで10％亜硫酸ナトリウム溶液を加え混
合後静置すればマンガンは酸化物として沈澱し分
離・回収できる。 Wastewater Am 3 containing trichlorethylene is placed in a treatment tank, and potassium permanganate solution is added to Bm 3 and mixed. In winter, it is necessary to keep the reaction tank at around 25°C or to extend the processing time. If you leave it alone, the decomposition will be completed. Then, add a 10% sodium sulfite solution until the reddish-purple color of permanganic acid disappears, mix and leave to stand. Manganese will precipitate as an oxide and can be separated and recovered.
本発明で対象とする排水中のトリクロロエチレ
ン濃度は１〜1000ppm程度であるが、６時間でト
リクロロエチレン濃度を0.1ppmまで分解するた
めに必要なＢ／Ａ（体積比）は0.1M（1.6％）過マ
ンガン酸カリウム溶液を用いる場合、次のように
なる。 The trichlorethylene concentration in wastewater targeted by the present invention is approximately 1 to 1000 ppm, but the B/A (volume ratio) required to decompose the trichlorethylene concentration to 0.1 ppm in 6 hours is 0.1 M (1.6%). When using a potassium manganate solution, the process is as follows.
トリクロロエチレン濃度 Ｂ／Ａ
1ppm １／100
10 １／70
100 １／33
1000 １／13
処理におけるトリクロロエチレン分解への過マ
ンガン酸塩濃度の影響を第２図に示す。トリクロ
ロエチレンの、初期濃度に対し分解後残つている
濃度の割合、残存率の経時変化を、過マンガン酸
塩濃度ごとに示してある。 Trichlorethylene concentration B/A 1ppm 1/100 10 1/70 100 1/33 1000 1/13 The influence of permanganate concentration on trichlorethylene decomposition during treatment is shown in Figure 2. The ratio of the concentration of trichlorethylene remaining after decomposition to the initial concentration and the change over time in the residual rate are shown for each permanganate concentration.
［発明の効果］
本発明は、以上説明したように、比較的少量の
試薬で、トリクロロエチレンを選択的に分解処理
することを可能とした。[Effects of the Invention] As explained above, the present invention has made it possible to selectively decompose trichlorethylene with a relatively small amount of reagent.
第１図は、トリクロロエチレン等含有排水を本
発明により処理する実例のフローダイアグラムで
ある。第２図は、25℃におけるトリクロロエチレ
ン（初濃度4.4ppm）の分解速度を過マンガン酸
塩濃度ごとに示したものである。
FIG. 1 is a flow diagram of an example of treating wastewater containing trichlorethylene, etc. according to the present invention. Figure 2 shows the decomposition rate of trichlorethylene (initial concentration 4.4 ppm) at 25°C for each permanganate concentration.
Claims (1)
ロロエチレン又はテトラクロロエチレンを酸化分
解処理する方法。1. A method of oxidizing and decomposing trichlorethylene or tetrachlorethylene in wastewater using a permanganate-based oxidizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4961389A JPH02229593A (en) | 1989-03-01 | 1989-03-01 | Treatment of waste water containing trichloroethylene or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4961389A JPH02229593A (en) | 1989-03-01 | 1989-03-01 | Treatment of waste water containing trichloroethylene or the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02229593A JPH02229593A (en) | 1990-09-12 |
| JPH0336598B2 true JPH0336598B2 (en) | 1991-05-31 |
Family
ID=12836087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4961389A Granted JPH02229593A (en) | 1989-03-01 | 1989-03-01 | Treatment of waste water containing trichloroethylene or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02229593A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3172728B2 (en) * | 1993-10-13 | 2001-06-04 | 栗田工業株式会社 | Method for removing divalent manganese ions |
| JP2003053357A (en) * | 2001-08-20 | 2003-02-25 | Kurita Water Ind Ltd | Method and device for reducing water containing permanganate |
| CZ301390B6 (en) * | 2006-08-03 | 2010-02-10 | Dekonta, A. S. | Reclamation process of chlorinated ethylene-contaminated rock medium by employing in-situ chemical oxidation method with protracted reclamation effect |
| CN105600985A (en) * | 2015-12-28 | 2016-05-25 | 北京北方节能环保有限公司 | Method for treating wastewater produced by hopcalite |
| CN106830436B (en) * | 2017-03-13 | 2020-05-05 | 同济大学 | Pre-oxidation method for drinking water treatment |
| JPWO2019181185A1 (en) * | 2018-03-22 | 2021-03-11 | 株式会社大阪ソーダ | Metal treatment agent and metal treatment method in liquid phase |
-
1989
- 1989-03-01 JP JP4961389A patent/JPH02229593A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02229593A (en) | 1990-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |