BE1010614A6 - Wet process recycling method for expanded or non-expanded polystyrene waste in the presence of other waste for the manufacture of various formulations - Google Patents
Wet process recycling method for expanded or non-expanded polystyrene waste in the presence of other waste for the manufacture of various formulations Download PDFInfo
- Publication number
- BE1010614A6 BE1010614A6 BE9600761A BE9600761A BE1010614A6 BE 1010614 A6 BE1010614 A6 BE 1010614A6 BE 9600761 A BE9600761 A BE 9600761A BE 9600761 A BE9600761 A BE 9600761A BE 1010614 A6 BE1010614 A6 BE 1010614A6
- Authority
- BE
- Belgium
- Prior art keywords
- waste
- expanded
- colloidal
- polystyrene
- expanded polystyrene
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention relates to the use of expanded polystyrene and/or non-expanded polystyrene essentially from foodstuff packaging. The expanded waste forms a colloidal mass in the presence of acetone or a colloidal solution in the presence of trichloroethylene or tetrahydrofuran wherein the micelles are coagulated by adding an alcohol or water. The colloidal mass may undergo two processes: a) It may undergo cold extrusion to form granules or cut into pieces and ground. b) It may be supplemented with fillers from industrial waste. Tyres or other rubbers give a soundproofing characteristic while rigid dust from thermosettable substances give a heat-insulating characteristics. The blocks obtained of more or less 0.5 m3 in volume should be packaged in the wet state.<IMAGE>
Description
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PROCEDE DU RECYCLAGE PAR VOIE HUMIDE
DES DECHETS DU POLYSTYRENE EXPANSE OU NON EXPANSE
EN PRESENCE D'AUTRES DECHETS
POUR LA FABRICATION DE DIVERS COMPOSITIONS
La présente invention est relative à l'utilisation des déchets du polystyrène expansé ou non expansé provenant principalement de l'emballage des denrées alimentaires et renfermant des odeurs désagréables et non recyclables par voies classiques à cause des déchets organiques présents.
A ce jour aucun remède industriel n'existe pour revaloriser ces déchets industriels qui font l'objet des discussions des problèmes écologiques.
La présente invention propose le moyen de traiter ces déchets par vole humide en se basant sur les propriétés que possèdent certains polymères de former une solution colloïdale ou une formation d'une masse amorphe avec une réduction importante de volume en présence de certains solvants.
La présente invention propose aussi à utiliser comme charge tout déchets industriels non toxiques et ayant une granulométrie de 2 à 10 mm d'épaisseurs.
Les formulations établies peuvent aller à un tonnage du produit recyclé ;
5000 T/an DU PNEU RECYCLABLE
3000 T/an POLYSTYRENE EXPANSE
1500 T/an DES POUSSIERES RIGIDES DES THERMODURCIS-
EMI1.1
SABLES. - ------- - -------
9500 T/an DE DECHETS peuvent ainsi rentrer dans le circuit économique et industriel.
Ecologiquement l'invention propose donc une double élimination des déchets dans le même procédé.
L'introduction des diverses charges élastomériques notamment du pneu broyé à quelques mm d'épaisseurs ou de déchets industriels sous forme de poussières rigides apportent des caractéristiques physiques ou thermiques importantes.
Dans ce cas une charge constituée par du pneu broyé à 2 à 5 mm d'épaisseur apporte une bonne isolation acoustique et une charge constituée par des poussières du polyuréthane rigide apporte une bonne isolation thermique.
La présente invention propose alors un recyclage des déchets du polystyrène expansé ou non expansé par voie humide en présence d'autres déchets pour la fabrication de diverses compositions sous forme de blocs qui seront ultérieurement condissionnés par un procédé de sciage aux dimensions voulues.
Selon une particularité de l'invention le polystyrène expansé suivi d'une réduction de volume en présence d'un solvant choisi parmi l'acétone, trichloréthylène ou tétrahydrofu-
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ranne peut subir une granulation dans un système particulier et être revalorisé en tant que tel.
COMPOSITION DU TRAITEMENT Les différents essais menés au laboratoire ont permis d'établir un procédé de traitement suivant ; 1* Les déchets provenant des emballages des denrées alimentaires constitués par du polystyrène expansé, après un traitement préalable sont soumis à un lavage et une désodorisation par une solution mixte de NaCl et NaOCl qui sera recyclé dans la même procédure afin de détruire les microbiens provenant du lavage.
Le chlore en excès avant d'être remis dans la décharge sera éliminé par une réaction chimique.
Le produit obtenu sera relavé et séché qui est chimiquement et biologiquement neutre. Ces opérations se réalisent dans un système en série de vis sans fin qui les conduit dans un autre système de séchage.
2* Le produit lavé propre et sec sera ensuite soumis à un traitement à l'aide d'un solvant choisi parmi l'acétone, trichloréthylène ou de tétrahydrofuranne dans un mélangeur spécial.
Dans le cas de l'acétone le polystyrène expansé diminue très largement son volume mais ne forme pas une solution colloïdale.
Dans le cas de tétrahydrofuranne le polystyrène forme une solution colloïdale ensuite les micelles sont coagulées par l'addition de l'eau. Dans le cas de trichloréthylène la solution colloïdale est coagulée par l'addition de l'alcool.
3* Le liant ainsi obtenu est ensuite additionné par des charges non toxiques et propre des déchets industriels. Cette opération s'effectue dans un autre mélangeur spécial muni d'un système pneumatique.
4* La récupération du polystyrène seul sans ajout des charges se fait séparément avec un système particulier. En effet le produit amorphe à l'aide d'une extrudeuse, à froid se granule à sa sortie puis séché avant d'être conditionné.
2* Afin de récupérer au maximum le solvant et de le recycler par la voie de la distillation Solvant/Eau le contenu du point 3* est soumis à un lavage.
6* La masse formée par le liant et la charge est ensuite introduite dans un moule spécial mais simple afin d'être pressé à des dimensions standarts ou voulues puis coupée, relavée et enfin sechée et conditionnée avant d'être mise sur le marché.
Le produit fabriqué trouve des applications sur le marché comme étant isolant thermique et phonique. Le polys-
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tyrène obtenu en 4* trouve des applications en thermoplastiques.
Divers produits intervenant comme charge influenceront sur les propriétés mécaniques, physiques ou thermiques du produit fini. Ces propriétés feront alors l'objet d'une recherche fondamentale technico-économique et écologique poussée.
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WET RECYCLING PROCESS
WASTE FROM EXPANDED OR NON-EXPANDED POLYSTYRENE
IN THE PRESENCE OF OTHER WASTE
FOR THE MANUFACTURE OF VARIOUS COMPOSITIONS
The present invention relates to the use of expanded or unexpanded polystyrene waste mainly from the packaging of foodstuffs and containing unpleasant odors and not recyclable by conventional means because of the organic waste present.
To date, no industrial remedy exists to recycle this industrial waste which is the subject of discussions of ecological problems.
The present invention provides a means of treating this waste by wet flies, based on the properties that certain polymers have of forming a colloidal solution or of forming an amorphous mass with a significant reduction in volume in the presence of certain solvents.
The present invention also proposes to use as filler any non-toxic industrial waste having a particle size of 2 to 10 mm in thickness.
The formulations established can go to a tonnage of the recycled product;
5000 T / year OF RECYCLABLE TIRE
3000 T / year POLYSTYRENE EXPANSE
1500 T / year OF RIGID DUST FROM THERMOSET
EMI1.1
SANDS. - ------- - -------
9,500 T / year OF WASTE can thus enter the economic and industrial circuit.
Ecologically, the invention therefore proposes a double elimination of waste in the same process.
The introduction of the various elastomeric fillers, in particular of the tire ground to a few mm in thickness or of industrial waste in the form of rigid dust, bring important physical or thermal characteristics.
In this case, a load consisting of ground tire 2 to 5 mm thick provides good acoustic insulation and a load consisting of rigid polyurethane dust provides good thermal insulation.
The present invention then proposes a recycling of the expanded or unexpanded wet polystyrene waste in the presence of other waste for the manufacture of various compositions in the form of blocks which will be subsequently packaged by a sawing process to the desired dimensions.
According to a feature of the invention, expanded polystyrene followed by a reduction in volume in the presence of a solvent chosen from acetone, trichlorethylene or tetrahydrofu-
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The ranne can be granulated in a particular system and be upgraded as such.
COMPOSITION OF THE TREATMENT The various tests carried out in the laboratory made it possible to establish a following treatment process; 1 * The waste from the packaging of foodstuffs constituted by expanded polystyrene, after a preliminary treatment is subjected to washing and deodorization by a mixed solution of NaCl and NaOCl which will be recycled in the same procedure in order to destroy the microbials coming from washing.
Excess chlorine before being returned to the landfill will be removed by a chemical reaction.
The product obtained will be rewashed and dried which is chemically and biologically neutral. These operations are carried out in a series system of worms which leads them to another drying system.
2 * The clean and dry washed product will then be subjected to a treatment using a solvent chosen from acetone, trichlorethylene or tetrahydrofuran in a special mixer.
In the case of acetone, expanded polystyrene very much decreases its volume but does not form a colloidal solution.
In the case of tetrahydrofuran the polystyrene forms a colloidal solution then the micelles are coagulated by the addition of water. In the case of trichlorethylene the colloidal solution is coagulated by the addition of alcohol.
3 * The binder thus obtained is then added by non-toxic and clean charges of industrial waste. This operation is carried out in another special mixer fitted with a pneumatic system.
4 * The recovery of the polystyrene alone without adding the charges is done separately with a special system. Indeed, the amorphous product using an extruder, when cold, granulates on leaving and then dried before being packaged.
2 * In order to recover the solvent as much as possible and to recycle it through the solvent / water distillation, the content of point 3 * is subjected to washing.
6 * The mass formed by the binder and the filler is then introduced into a special but simple mold in order to be pressed to standard or desired dimensions then cut, rewashed and finally dried and conditioned before being placed on the market.
The manufactured product finds applications on the market as thermal and sound insulation. The polys-
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tyrene obtained in 4 * finds applications in thermoplastics.
Various products acting as filler will influence the mechanical, physical or thermal properties of the finished product. These properties will then be the subject of fundamental technical-economic and ecological research.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9600761A BE1010614A6 (en) | 1996-09-11 | 1996-09-11 | Wet process recycling method for expanded or non-expanded polystyrene waste in the presence of other waste for the manufacture of various formulations |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9600761A BE1010614A6 (en) | 1996-09-11 | 1996-09-11 | Wet process recycling method for expanded or non-expanded polystyrene waste in the presence of other waste for the manufacture of various formulations |
Publications (1)
Publication Number | Publication Date |
---|---|
BE1010614A6 true BE1010614A6 (en) | 1998-11-03 |
Family
ID=3889959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE9600761A BE1010614A6 (en) | 1996-09-11 | 1996-09-11 | Wet process recycling method for expanded or non-expanded polystyrene waste in the presence of other waste for the manufacture of various formulations |
Country Status (1)
Country | Link |
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BE (1) | BE1010614A6 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1550536A1 (en) * | 2002-08-28 | 2005-07-06 | JFE Engineering Corporation | Method for recycling foamed polystyrol resin |
-
1996
- 1996-09-11 BE BE9600761A patent/BE1010614A6/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1550536A1 (en) * | 2002-08-28 | 2005-07-06 | JFE Engineering Corporation | Method for recycling foamed polystyrol resin |
EP1550536A4 (en) * | 2002-08-28 | 2007-08-08 | Jfe Eng Corp | Method for recycling foamed polystyrol resin |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: SALMAN MUSTAPHA NIHAD Effective date: 19980930 |