JPH07157776A - Method for pretreating plastic waste containing vinyl chloride - Google Patents
Method for pretreating plastic waste containing vinyl chlorideInfo
- Publication number
- JPH07157776A JPH07157776A JP30817093A JP30817093A JPH07157776A JP H07157776 A JPH07157776 A JP H07157776A JP 30817093 A JP30817093 A JP 30817093A JP 30817093 A JP30817093 A JP 30817093A JP H07157776 A JPH07157776 A JP H07157776A
- Authority
- JP
- Japan
- Prior art keywords
- plastic waste
- vinyl chloride
- mixture
- hydrogen chloride
- waste containing
- 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- Withdrawn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
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は塩化ビニル含有プラスチ
ック廃棄物を熱分解して有用な物質として回収すると
き、その前処理としてプラスチック廃棄物中に含有する
塩化ビニルより発生する塩化水素を除去する方法に関す
る。TECHNICAL FIELD The present invention removes hydrogen chloride generated from vinyl chloride contained in plastic waste as a pretreatment when the plastic waste containing vinyl chloride is thermally decomposed and recovered as a useful substance. Regarding the method.
【０００２】[0002]
【従来の技術】近年、プラスチック廃棄物が多量に排出
され、その廃棄量も増加の一途をたどっている。このよ
うなプラスチック廃棄物の処理方法として、ほとんどが
そのまま焼却するか埋め立て処分されているのが現状で
ある。2. Description of the Related Art In recent years, a large amount of plastic waste is discharged, and the amount of waste is increasing. Currently, most of the plastic waste treatment methods are incinerated or landfilled.
【０００３】[0003]
【発明が解決しようとする課題】プラスチック廃棄物中
に塩化ビニル樹脂が混入していると熱分解及び燃焼によ
り塩化水素が大量に発生し、大きな公害の原因になるば
かりでなく、焼却炉の腐食を引き起こすという問題点が
ある。そのため、前処理により発生する塩化水素を除去
しておくことが重要となる。しかし、プラスチック廃棄
物の前処理法として、ヒータ外部加熱により分解槽中で
熱分解を行うと、溶融物が融着して塊状になり熱伝導効
率が低下するため、樹脂中の塩化水素が溶融樹脂中に取
り残され、減圧しても塩化水素の除去が不完全であると
いう問題があった。When vinyl chloride resin is mixed in plastic waste, a large amount of hydrogen chloride is generated by thermal decomposition and combustion, which not only causes great pollution but also causes corrosion of incinerators. There is a problem that causes. Therefore, it is important to remove hydrogen chloride generated by the pretreatment. However, as a pretreatment method for plastic waste, if heat decomposition is performed in the decomposition tank by external heating of the heater, the molten material will fuse and form a lump, which will reduce the heat transfer efficiency, and the hydrogen chloride in the resin will melt. There was a problem that hydrogen chloride was left in the resin and the removal of hydrogen chloride was incomplete even when the pressure was reduced.
【０００４】本発明は上記技術水準に鑑み、プラスチッ
ク廃棄物に含まれる塩化ビニルを熱分解するときに発生
する塩化水素を高除去率で行うことができる前処理方法
を提供しようとするものである。In view of the above-mentioned state of the art, the present invention aims to provide a pretreatment method capable of carrying out a high removal rate of hydrogen chloride generated when thermally decomposing vinyl chloride contained in plastic waste. .
【０００５】[0005]
【課題を解決するための手段】本発明は （１）塩化ビニル含有プラスチック廃棄物の混合物をエ
クストルーダに投入後、マイクロ波照射により該混合物
を加熱溶融し、該混合物の熱分解により発生する塩化水
素及び軟化・溶融した該混合物に溶解している塩化水素
を５０Ｔｏｒｒ以下の減圧下で脱気することを特徴とす
る塩化ビニル含有プラスチック廃棄物の前処理方法。 （２）塩化ビニル含有プラスチック廃棄物が予めＣａ化
合物を添加されたものであることを特徴とする上記
（１）記載の塩化ビニル含有プラスチック廃棄物の前処
理方法。である。MEANS FOR SOLVING THE PROBLEMS The present invention comprises: (1) Hydrogen chloride generated by thermal decomposition of a mixture of vinyl chloride-containing plastic waste, which is heated and melted by microwave irradiation after being charged into an extruder. And a method for pretreatment of vinyl chloride-containing plastic waste, which comprises degassing hydrogen chloride dissolved in the softened / melted mixture under a reduced pressure of 50 Torr or less. (2) The pretreatment method for vinyl chloride-containing plastic waste according to the above (1), characterized in that the vinyl chloride-containing plastic waste is a Ca compound added in advance. Is.
【０００６】[0006]
【作用】本発明によれば、塩化ビニルを含むプラスチッ
ク廃棄物の溶融手段として、エクストルーダに、例えば
周波数：２４５０ＭＨｚのマイクロ波を照射して加熱効
率を高めるとともに、熱分解により発生した塩化水素を
０〜５０Ｔｏｒｒの減圧下で脱気することにより塩化水
素の除去時間を短縮することができ、さらに廃棄物中に
Ｃａ化合物を予め混合すると、Ｃａ化合物のＣａイオン
がプラスチック廃棄物の塩化水素と反応して発生する塩
化水素を除去することができる。According to the present invention, as a melting means for plastic waste containing vinyl chloride, the extruder is irradiated with microwaves having a frequency of, for example, 2450 MHz to enhance heating efficiency and hydrogen chloride generated by thermal decomposition is eliminated. By degassing under a reduced pressure of ~ 50 Torr, the time for removing hydrogen chloride can be shortened, and when Ca compound is mixed in the waste in advance, Ca ion of Ca compound reacts with hydrogen chloride of plastic waste. Hydrogen chloride generated as a result can be removed.
【０００７】[0007]
（比較例）プラスチックを含んだ廃棄物として、ポリス
チレン、塩化ビニル、ＦＲＰ樹脂（繊維：ガラス繊維、
樹脂：不飽和ポリエステル又はエポキシ樹脂）及びその
他不純物の混合物を使用した。このプラスチック廃棄物
をヒータ及びマイクロ波（周波数：２４５０ＭＨｚ）加
熱したエクストルーダに投入、表１に示す条件で１０分
間加熱分解して廃棄物中の塩化水素を除去した。プラス
チック廃棄物の塩化水素分析結果は下記表１に示す値と
なった。(Comparative Example) As waste containing plastic, polystyrene, vinyl chloride, FRP resin (fiber: glass fiber,
Resin: unsaturated polyester or epoxy resin) and mixtures of other impurities were used. This plastic waste was put into a heater and an extruder heated by microwaves (frequency: 2450 MHz), and thermally decomposed under the conditions shown in Table 1 for 10 minutes to remove hydrogen chloride in the waste. The hydrogen chloride analysis results of the plastic waste have the values shown in Table 1 below.
【０００８】（実施例）プラスチックを含んだ廃棄物と
して、比較例と同じ混合物及び該混合物に予めＣａ（Ｏ
Ｈ）2 水溶液を加えたものを使用した。エクストルーダ
でプラスチック廃棄物をマイクロ波（周波数：２４５０
ＭＨｚ）により１０分間熱分解し、廃棄物の分解により
発生する塩化水素を減圧下除去した。プラスチック廃棄
物の塩化水素除去率は９５％以上であった。(Example) As a waste containing plastic, the same mixture as in the comparative example and Ca (O 2) were previously added to the mixture.
H) 2 aqueous solution was used. Extruder microwaves plastic waste (frequency: 2450
MHz) for thermal decomposition for 10 minutes, and hydrogen chloride generated by decomposition of the waste was removed under reduced pressure. The hydrogen chloride removal rate of the plastic waste was 95% or more.
【０００９】[0009]
【表１】 * 脱塩化水素率 ： 単位 ％[Table 1] * Dehydrochlorination rate: Unit%
【００１０】[0010]
【発明の効果】本発明によれば塩化ビニル含有プラスチ
ック廃棄物の混合物を熱分解するときに発生する塩化水
素を高効率で除去することができる。従って塩化水素を
除去した廃棄物残査は触媒存在下、さらに高温で熱分解
し、石油、灯油などの有用な炭化水素油として回収する
ことができる。According to the present invention, hydrogen chloride generated when a mixture of vinyl chloride-containing plastic waste is pyrolyzed can be removed with high efficiency. Therefore, the waste residue from which hydrogen chloride has been removed can be thermally decomposed at a higher temperature in the presence of a catalyst and recovered as a useful hydrocarbon oil such as petroleum and kerosene.
Claims (2)
合物をエクストルーダに投入後、マイクロ波照射により
該混合物を加熱溶融し、該混合物の熱分解により発生す
る塩化水素及び軟化・溶融した該混合物に溶解している
塩化水素を５０Ｔｏｒｒ以下の減圧下で脱気することを
特徴とする塩化ビニル含有プラスチック廃棄物の前処理
方法。1. A mixture of vinyl chloride-containing plastic waste is charged into an extruder, then the mixture is heated and melted by microwave irradiation, and dissolved in hydrogen chloride generated by thermal decomposition of the mixture and the softened / melted mixture. The method for pretreatment of vinyl chloride-containing plastic waste, comprising degassing hydrogen chloride under a reduced pressure of 50 Torr or less.
めＣａ化合物を添加されたものであることを特徴とする
請求項１記載の塩化ビニル含有プラスチック廃棄物の前
処理方法。2. The pretreatment method for vinyl chloride-containing plastic waste according to claim 1, wherein the vinyl chloride-containing plastic waste has been added with a Ca compound in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30817093A JPH07157776A (en) | 1993-12-08 | 1993-12-08 | Method for pretreating plastic waste containing vinyl chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30817093A JPH07157776A (en) | 1993-12-08 | 1993-12-08 | Method for pretreating plastic waste containing vinyl chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07157776A true JPH07157776A (en) | 1995-06-20 |
Family
ID=17977749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30817093A Withdrawn JPH07157776A (en) | 1993-12-08 | 1993-12-08 | Method for pretreating plastic waste containing vinyl chloride |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07157776A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996022867A1 (en) * | 1995-01-26 | 1996-08-01 | Urban Stricker | Devices for the relaxation of bulk articles containing drawn thermoplastics and for the selective softening of thermoplastics in a mixture flow for recycling |
-
1993
- 1993-12-08 JP JP30817093A patent/JPH07157776A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996022867A1 (en) * | 1995-01-26 | 1996-08-01 | Urban Stricker | Devices for the relaxation of bulk articles containing drawn thermoplastics and for the selective softening of thermoplastics in a mixture flow for recycling |
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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: 20010306 |