JP2000256502A - Processing liquid for foamed polystyrene - Google Patents
Processing liquid for foamed polystyreneInfo
- Publication number
- JP2000256502A JP2000256502A JP6433699A JP6433699A JP2000256502A JP 2000256502 A JP2000256502 A JP 2000256502A JP 6433699 A JP6433699 A JP 6433699A JP 6433699 A JP6433699 A JP 6433699A JP 2000256502 A JP2000256502 A JP 2000256502A
- Authority
- JP
- Japan
- Prior art keywords
- styrofoam
- methylene chloride
- epoxide
- amine compound
- foamed polystyrene
- 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
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、梱包材等で使用済
みとなった発泡スチロールを瞬時に減容化でき、環境面
からも優れた発泡スチロール処理液に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a styrofoam treatment solution which is capable of instantaneously reducing the volume of styrofoam used in a packing material or the like and which is excellent in environmental aspects.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】発泡ス
チロールは、クッション性、耐衝撃性、耐水性、断熱性
に優れ、加えて任意の形状に加工しやすく、安価である
ことから、種々の梱包材や生鮮食料品トレーなどの広い
分野で使用されている。2. Description of the Related Art Styrofoam is excellent in cushioning property, impact resistance, water resistance and heat insulation, and is easily processed into an arbitrary shape and is inexpensive. It is used in a wide range of fields, such as timber and fresh food trays.
【０００３】しかし、発泡スチロールは嵩高性を有する
ため、廃棄処分する場合、広いスペースが必要となり、
運搬経費がかさむ。その上、土壌中では分解せず、焼却
処分では黒煙を発生して高熱により焼却炉が損傷するな
ど、廃棄処分コスト、環境保全の側面から問題となって
いる。[0003] However, since styrofoam has a bulky property, a large space is required for disposal.
Transport costs increase. In addition, they do not decompose in the soil, generate black smoke during incineration, and damage the incinerator due to high heat. This is a problem in terms of disposal costs and environmental protection.
【０００４】一方、近年、産業廃棄物処理法の規制に伴
い、環境保護、資源再生化の機運の高まりつつあること
から、種々の発泡スチロールのリサイクル法が試みられ
ている。[0004] On the other hand, in recent years, various regulations have been tried for recycling styrofoam since the momentum for environmental protection and resource recycling is increasing in accordance with the regulations of the Industrial Waste Disposal and Public Cleansing Law.
【０００５】例えば、電熱、熱風加熱など熱を加え、発
泡スチロールを溶融減容する熱減容法は、電気エネルギ
ー消費量が大きく、異物除去が難しい上に、高熱処理
（２８０〜３００℃）を行うため、再生品の物性低下、
処理中の悪臭による環境の悪化などの問題がある。[0005] For example, the heat volume reduction method for melting and reducing the volume of polystyrene foam by applying heat such as electric heating or hot air heating consumes a large amount of electric energy, makes it difficult to remove foreign substances, and performs high heat treatment (280 to 300 ° C). As a result, the properties of recycled products deteriorate,
There are problems such as deterioration of the environment due to odor during treatment.
【０００６】また、発泡スチロールを有機溶剤に溶解さ
せて減容する溶剤溶解法としては、ケトン類、エステル
類、芳香族炭化水素、塩素系溶剤、その他エーテル類、
モノテルペン類などの有機溶剤を用いて、発泡スチロー
ルを溶解、減容処理し、この溶液から有機溶剤とスチロ
ール樹脂を分離回収する方法が提案されている。[0006] Solvent dissolving methods for dissolving polystyrene foam in an organic solvent to reduce the volume include ketones, esters, aromatic hydrocarbons, chlorine solvents, other ethers,
A method has been proposed in which styrene foam is dissolved and reduced in volume using an organic solvent such as monoterpenes, and the organic solvent and styrene resin are separated and recovered from the solution.
【０００７】しかし、塩素系溶剤を除くケトン、エステ
ル、エーテル類、芳香族炭化水素などは、いずれも可燃
性溶剤であるため危険である。また、発泡スチロールを
有機溶剤に溶解、溶液化したとき、発泡スチロールが持
ち込む水分、雰囲気中の水分、空気中の酸素がこの溶液
に含有されるために、この溶液から有機溶剤と発泡スチ
ロール樹脂を分離回収すべく加熱蒸留などの処理が不可
欠となる。ここで問題となるのが有機溶剤の熱分解、加
水分解による酸化である。更に、これらの問題を解決す
るため、不活性ガスの封入、混合を考慮しなければなら
ない。However, ketones, esters, ethers, aromatic hydrocarbons and the like, excluding chlorine-based solvents, are dangerous because they are all flammable solvents. Further, when styrene foam is dissolved in an organic solvent and made into a solution, the water introduced by the styrene foam, the moisture in the atmosphere, and the oxygen in the air are contained in this solution. Therefore, the organic solvent and the styrene foam resin are separated and recovered from this solution. Therefore, treatment such as heat distillation is indispensable. Here, the problem is oxidation due to thermal decomposition and hydrolysis of the organic solvent. Furthermore, in order to solve these problems, it is necessary to consider filling and mixing of an inert gas.
【０００８】このように、有機溶剤の熱分解、加水分解
による酸化を防ぎ、安定な発泡スチロール処理液の出現
が望まれていたが、充分に満足するものは未だない。As described above, it has been desired to develop a stable styrofoam treatment solution while preventing the organic solvent from being thermally decomposed and oxidized by hydrolysis, but there has been no satisfactory solution.
【０００９】従って、本発明は、有機溶剤の熱分解、加
水分解による酸化を可及的に防止し、処理装置を腐食さ
せることもなく、発泡スチロールを瞬時に減容化でき、
安定性の点でも優れた発泡スチロール処理液を提供する
ことを目的とする。Therefore, the present invention can prevent oxidation of the organic solvent by thermal decomposition and hydrolysis as much as possible, and can instantaneously reduce the volume of polystyrene foam without corroding the treatment equipment.
An object of the present invention is to provide a styrofoam treatment liquid that is excellent also in terms of stability.
【００１０】[0010]
【課題を解決するための手段及び発明の実施の形態】本
発明者らは、上記目的を達成するため鋭意検討を行った
結果、有機溶剤として塩化メチレンを使用し、これにエ
ポキシド及びアミン化合物を添加した処理液、より好適
にはこの処理液に更に炭素数５〜７の不飽和炭化水素や
炭素数１〜３のアルコールを添加したものが、発泡スチ
ロールを瞬時に減容化し、しかもこの場合、有機溶剤
（塩化メチレン）の熱分解、加水分解による酸化を防
ぎ、安定で環境保全の観点からも優れたものであること
を見出し、本発明をなすに至った。Means for Solving the Problems and Embodiments of the Invention The present inventors have conducted intensive studies in order to achieve the above object, and as a result, used methylene chloride as an organic solvent, and added an epoxide and an amine compound thereto. The added processing liquid, more preferably the processing liquid further added with an unsaturated hydrocarbon having 5 to 7 carbon atoms or an alcohol having 1 to 3 carbon atoms, instantaneously reduces the volume of styrene foam, and in this case, The present invention has been found to prevent oxidation due to thermal decomposition and hydrolysis of an organic solvent (methylene chloride), to be stable and to be excellent from the viewpoint of environmental protection, and to accomplish the present invention.
【００１１】以下、本発明につき更に詳しく説明する。
本発明の発泡スチロール処理液は、塩化メチレン、エポ
キシド、及びアミン化合物を含有する。Hereinafter, the present invention will be described in more detail.
The styrofoam treatment liquid of the present invention contains methylene chloride, epoxide, and an amine compound.
【００１２】ここで、塩化メチレンの処理液中の含有量
は９８．５〜９９．９％（重量％、以下同じ）、特に９
９．２〜９９．７％であることが好ましい。塩化メチレ
ン量が少なすぎるとエポキシド、アミン化合物等の添加
量が多くなり、可燃性を有する場合があり、多すぎると
エポキシド、アミン化合物等の添加量が少なくなるた
め、塩化メチレンの安定性が低下し、熱分解、加水分解
を誘発する場合がある。Here, the content of methylene chloride in the treatment liquid is 98.5 to 99.9% (weight%, the same applies hereinafter), particularly 9
It is preferably from 9.2 to 99.7%. If the amount of methylene chloride is too small, the added amount of the epoxide, the amine compound, etc. increases, and there may be flammability.If the amount is too large, the added amount of the epoxide, the amine compound, etc. decreases, so that the stability of the methylene chloride decreases. And may induce thermal decomposition and hydrolysis.
【００１３】本発明で用いるエポキシドとしては、沸点
が３０〜９０℃であるエポキシドが好ましいものとして
挙げられ、具体的には、例えばプロピレンオキシド、ブ
チレンオキシド、テトラヒドロフランなどが挙げられ
る。エポキシドは、これらの一種又は二種以上を組み合
わせて添加することができ、その添加量は０．１〜１．
０％、好ましくは０．２〜０．５％である。エポキシド
の添加量が少なすぎると塩化メチレンの安定化を保持す
ることができず、多すぎると副生物を生成しやすくな
る。The epoxide used in the present invention is preferably an epoxide having a boiling point of from 30 to 90 ° C., and specific examples thereof include propylene oxide, butylene oxide and tetrahydrofuran. The epoxide can be added alone or in combination of two or more thereof.
0%, preferably 0.2 to 0.5%. If the amount of the epoxide is too small, the stabilization of methylene chloride cannot be maintained, and if the amount is too large, a by-product is easily generated.
【００１４】本発明で用いるアミン化合物としては、沸
点が３０〜９０℃であるアミン化合物が好ましいものと
して挙げられ、具体的には、例えばジエチルアミン、ト
リエチルアミン、イソプロピルアミン、ジイソプロピル
アミン、ｎ−ブチルアミンなどが挙げられる。アミン化
合物は、これらの一種又は二種以上を組み合わせて添加
することができ、その添加量は０．０１〜０．２％、好
ましくは０．０１〜０．０５％である。アミン化合物の
添加量が少なすぎると熱及び加水分解の安定性を保持で
きず、多すぎると逆に塩化メチレンを侵食する作用が高
くなる場合がある。As the amine compound used in the present invention, an amine compound having a boiling point of from 30 to 90 ° C. is preferred, and specific examples thereof include diethylamine, triethylamine, isopropylamine, diisopropylamine, n-butylamine and the like. No. The amine compound can be added alone or in combination of two or more thereof, and the amount of addition is 0.01 to 0.2%, preferably 0.01 to 0.05%. If the amount of the amine compound is too small, the stability of heat and hydrolysis cannot be maintained, and if it is too large, the action of eroding methylene chloride may be increased.
【００１５】本発明の発泡スチロール処理液は、更に炭
素数５〜７の不飽和炭化水素を添加することができる。
炭素数５〜７の不飽和炭化水素として具体的には、例え
ば２−ペンテン、２−メチル−２−ブテン、２−ヘキセ
ン、２−ヘプテンなどが挙げられる。炭素数５〜７の不
飽和炭化水素は、これらの一種又は二種以上を組み合わ
せて添加することができ、その添加量は１０〜２００ｐ
ｐｍ、好ましくは５０〜１００ｐｐｍである。炭素数５
〜７の不飽和炭化水素の添加量が１０ｐｐｍ未満では塩
化メチレンの分解抑制効果に寄与せず、２００ｐｐｍを
超えると分解抑制効果はあまり期待できず、経済的デメ
リットが大きくなる。The styrofoam solution of the present invention may further contain an unsaturated hydrocarbon having 5 to 7 carbon atoms.
Specific examples of the unsaturated hydrocarbon having 5 to 7 carbon atoms include 2-pentene, 2-methyl-2-butene, 2-hexene, and 2-heptene. The unsaturated hydrocarbon having 5 to 7 carbon atoms can be added alone or in combination of two or more thereof.
pm, preferably 50-100 ppm. Carbon number 5
If the amount of the unsaturated hydrocarbons of (7) to (7) is less than 10 ppm, it does not contribute to the effect of suppressing the decomposition of methylene chloride.
【００１６】また、本発明の発泡スチロール処理液は、
更に炭素数１〜３のアルコールを添加することができ
る。炭素数１〜３のアルコールとして具体的には、例え
ばメタノール、エタノール、プロパノール、イソプロピ
ルアルコールなどが挙げられる。炭素数１〜３のアルコ
ールは、これらの一種又は二種以上を組み合わせて添加
することができ、その添加量は１０〜２０００ｐｐｍ、
好ましくは５００〜１０００ｐｐｍである。炭素数１〜
３のアルコールの添加量が１０ｐｐｍ未満では塩化メチ
レンの分解抑制効果に寄与せず、２０００ｐｐｍを超え
ると塩化メチレンの分解抑制効果が期待できず、引火性
を高めることとなる。The styrofoam treatment solution of the present invention comprises:
Further, an alcohol having 1 to 3 carbon atoms can be added. Specific examples of the alcohol having 1 to 3 carbon atoms include methanol, ethanol, propanol, and isopropyl alcohol. The alcohol having 1 to 3 carbon atoms can be added alone or in combination of two or more thereof, and the added amount is 10 to 2000 ppm,
Preferably it is 500-1000 ppm. Carbon number 1
If the addition amount of the alcohol 3 is less than 10 ppm, it does not contribute to the effect of suppressing the decomposition of methylene chloride, and if it exceeds 2000 ppm, the effect of suppressing the decomposition of methylene chloride cannot be expected, and the flammability is increased.
【００１７】本発明の発泡スチロール処理液を用いて使
用済みの発泡スチロールを処理する方法としては、従来
公知の溶剤溶解法と同様の方法を採用できるが、溶解処
理温度は２０〜３０℃とすることが好ましい。As a method for treating used styrofoam using the styrofoam treatment solution of the present invention, a method similar to a conventionally known solvent dissolving method can be employed, but the dissolving temperature is preferably 20 to 30 ° C. preferable.
【００１８】また、発泡スチロールを処理した後の処理
液は、加熱蒸留により塩化メチレンを回収することがで
き、塩化メチレンを分離除去したポリスチロールは通常
の方法によりリサイクルすることができる。この場合、
本発明の処理液は、加熱蒸留時に処理液中に水分が混入
されていても、塩化メチレンの熱分解、加水分解が抑制
され、ステンレススチール等の処理装置の損傷も抑制さ
れるものである。Further, from the treatment liquid after the treatment of the expanded polystyrene, methylene chloride can be recovered by heating distillation, and the polystyrene from which methylene chloride has been separated and removed can be recycled by an ordinary method. in this case,
The processing liquid of the present invention suppresses thermal decomposition and hydrolysis of methylene chloride even when moisture is mixed in the processing liquid during heating distillation, and also suppresses damage to processing equipment such as stainless steel.
【００１９】[0019]
【実施例】以下、実施例及び比較例により本発明を具体
的に説明するが、本発明は下記の実施例に制限されるも
のではない。EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to the following examples.
【００２０】〔実施例，比較例〕 （１）発泡スチロール処理液の加水分解性 表１，２に示される組成の発泡スチロール処理液４００
ｍＬと水４０ｍＬをオートクレーブ（容積１Ｌ、ＳＵＳ
３１６製）に同時に仕込み、密封後、加熱昇温して設定
温度１６０℃（内圧２．５ＭＰａ）に達した時点からこ
の状態を２時間保持した。次いで、急冷して室温に戻
し、水のｐＨ、Ｃｌ-の発生量を測定した。[Examples and Comparative Examples] (1) Hydrolysis of Styrofoam Treatment Solution Styrofoam treatment solution 400 having the composition shown in Tables 1 and 2
autoclave (volume 1L, SUS)
316), and after sealing, the temperature was raised to a set temperature of 160 ° C. (internal pressure of 2.5 MPa), and this state was maintained for 2 hours. Then, back to room temperature and quenched, pH of water, Cl - was determined of emissions.
【００２１】発泡スチロール処理液水層のｐＨ、Ｃｌ-
の分析値から本発明の発泡スチロール処理液の主剤であ
る塩化メチレンの分解状態を、水層着色及びオートクレ
ーブ材質の腐食の有無から発泡スチロール処理液による
処理装置材質へのダメージ度を評価した。その結果を表
１，２に示す。The pH of the styrofoam treatment liquid aqueous layer, Cl -
Of the methylene chloride, which is the main component of the styrofoam treatment liquid of the present invention, and the degree of damage to the processing apparatus material by the styrofoam treatment liquid were evaluated based on the presence or absence of water layer coloring and corrosion of the autoclave material. The results are shown in Tables 1 and 2.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】（２）発泡スチロール処理液による減容 ３００ｍＬトールビーカーに実施例２と同様の組成の発
泡スチロール処理液を各々１００ｍＬ入れ、５００ｍＬ
（４×４．２×３０ｃｍ）の発泡スチロール試験片を１
本ずつ室温（２０℃）において各処理液に浸漬して、発
泡スチロールが減容するのに要した時間を測定した。比
較例として、酢酸エチル（比較例６），（Ｒ）−リモネ
ン（比較例７）を用いて同様に発泡スチロールが減容す
るのに要した時間を測定した。(2) Volume Reduction by Styrofoam Treatment Solution In a 300 mL tall beaker, 100 mL of each of the Styrofoam treatment solutions having the same composition as in Example 2 were added, and 500 mL
(4 × 4.2 × 30 cm) styrene foam test piece
Each piece was immersed in each treatment liquid at room temperature (20 ° C.), and the time required for reducing the volume of the styrene foam was measured. As a comparative example, the time required for reducing the volume of styrofoam was similarly measured using ethyl acetate (Comparative Example 6) and (R) -limonene (Comparative Example 7).
【００２５】実施例及び比較例のいずれの発泡スチロー
ル処理液においても、発泡スチロールを順次溶解してい
くと、発泡スチロール樹脂の溶解濃度及び処理液の粘度
が高くなり、それに伴い発泡スチロールの溶解速度も遅
くなった。In any of the styrofoam treatment liquids of Examples and Comparative Examples, when the styrofoam was sequentially dissolved, the dissolved concentration of the styrofoam resin and the viscosity of the treatment liquid were increased, and the dissolution rate of the styrofoam was slowed accordingly. .
【００２６】[0026]
【表３】 [Table 3]
【００２７】[0027]
【発明の効果】本発明の発泡スチロール処理液を使用す
ることにより、従来の発泡スチロール処理液よりも瞬時
に減容化がされ、発泡スチロール廃棄物処理作業の効率
化が期待できる。また、不燃性溶剤で低沸点の塩化メチ
レンを使用しているため、火災、爆発の危険が軽減さ
れ、溶剤回収エネルギーの省力化が可能となる。By using the styrofoam treatment liquid of the present invention, the volume can be reduced more instantaneously than the conventional styrofoam treatment liquid, and the efficiency of the styrofoam waste disposal work can be expected to be improved. Further, since low-boiling methylene chloride is used as a nonflammable solvent, the risk of fire and explosion is reduced, and the energy for solvent recovery can be saved.
Claims (3)
化合物を含むことを特徴とする発泡スチロール処理液。1. A styrofoam treatment solution comprising methylene chloride, an epoxide, and an amine compound.
添加することを特徴とする請求項１記載の発泡スチロー
ル処理液。2. The styrofoam treatment liquid according to claim 1, further comprising an unsaturated hydrocarbon having 5 to 7 carbon atoms.
することを特徴とする請求項１又は２記載の発泡スチロ
ール処理液。3. The styrofoam treatment liquid according to claim 1, further comprising an alcohol having 1 to 3 carbon atoms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6433699A JP2000256502A (en) | 1999-03-11 | 1999-03-11 | Processing liquid for foamed polystyrene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6433699A JP2000256502A (en) | 1999-03-11 | 1999-03-11 | Processing liquid for foamed polystyrene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000256502A true JP2000256502A (en) | 2000-09-19 |
Family
ID=13255309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6433699A Pending JP2000256502A (en) | 1999-03-11 | 1999-03-11 | Processing liquid for foamed polystyrene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000256502A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002060725A (en) * | 2000-08-23 | 2002-02-26 | Sawa Kiyoji | Gel adhesion-preventing agent, solvent which use the same and is used for treating foamed polystyrene, and method for treating foamed polystyrene with the same |
| KR20020090503A (en) * | 2001-05-28 | 2002-12-05 | 박병식 | Reclaiming method for used styrofoam |
| JP2003145537A (en) * | 2001-08-29 | 2003-05-20 | Nkk Corp | Method for recycling expanded styrol resin |
| WO2004020167A1 (en) * | 2002-08-28 | 2004-03-11 | Jfe Engineering Corporation | Method for recycling foamed polystyrol resin |
-
1999
- 1999-03-11 JP JP6433699A patent/JP2000256502A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002060725A (en) * | 2000-08-23 | 2002-02-26 | Sawa Kiyoji | Gel adhesion-preventing agent, solvent which use the same and is used for treating foamed polystyrene, and method for treating foamed polystyrene with the same |
| KR20020090503A (en) * | 2001-05-28 | 2002-12-05 | 박병식 | Reclaiming method for used styrofoam |
| JP2003145537A (en) * | 2001-08-29 | 2003-05-20 | Nkk Corp | Method for recycling expanded styrol resin |
| WO2004020167A1 (en) * | 2002-08-28 | 2004-03-11 | Jfe Engineering Corporation | Method for recycling foamed polystyrol resin |
| CN100408295C (en) * | 2002-08-28 | 2008-08-06 | 杰富意工程股份有限公司 | Method for recycling foamed polystyrol resin |
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