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The role of chemistry in plastics recycling / Martin Schlummer in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 5 (2020)
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Titre : The role of chemistry in plastics recycling : A comparison of physical and chemical plastics recycling Type de document : texte imprimé Auteurs : Martin Schlummer, Auteur ; Tanja Fell, Auteur ; Andreas Mäurer, Auteur ; Gerald Altnau, Auteur Année de publication : 2020 Article en page(s) : p. 34-35 Langues : Anglais (eng) Catégories : Matières plastiques -- Recyclage
Recyclage chimique
Recyclage physiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Today plastics recycling is usually only classified as being either mechanical or chemical. This view ‧ignores the fact that the main difference between the two is whether physical or chemical reactions are taking place. However, precise differentiation is crucial for any assessment of the possibilities and limitations of plastic ‧recovery processes and whether materials are actually being recycled or merely their raw materials recovered. Note de contenu : - The physical and chemical processes involved in plastics recycling
- Mechanical recycling
- Solvent based recycling (dissolution)
- Chemical recycling
- Fig. 1 : Modified 8-step waste hierarchy according to Defra 2011
- Fig. 2 : Process steps involved in physical and chemical recycling : while physical recycling uses the material direct, chemical recycling only serves to recover feedstocks and requires an (energy-intensive) polymerization step before these can be reused in plasticsEn ligne : https://drive.google.com/file/d/1ypOLv1hMni7Kmw2MKIZyedj81Grl5Jt0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34465
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 5 (2020) . - p. 34-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21834 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Turning old into new : A robust continuous process for the chemical recycling of polystyrene Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Philipp Schäfer, Auteur ; Nils Dauber, Auteur ; Martin Facklam, Auteur Année de publication : 2020 Article en page(s) : p. 40-43 Langues : Anglais (eng) Catégories : Caractérisation
Dépolymérisation
Extrusion réactive
Matières plastiques -- Recyclage
Polystyrène
Recyclage chimiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Due to their good feed characteristics and self-cleaning properties, twin-screw extruders enable even contaminated post-consumer polystyrene to be depolymerized continuously and efficiently. This opens up a promising recycling route in terms of industrial implementation via renewed polymer synthesis to produce plastic granules with a quality approaching that of virgin material. Note de contenu : - Chemical recycling of polystyrene
- Continuous depolymerization of polystyrene in a twin-screw extruder
- Influence of screw speed and material composition
- Figure : Continuous process in a twin-screw extruder: For industrial implementation of chemical recycling of polystyrene, a reactor technology is required that allows high throughput rates and also processes heavily contaminated post-consumer material continuously with high process stability
- Fig. 1 : Depolymerization mechanism of polystyrene to styrene (in brackets: boiling temperatures)
- Fig. 2 : Characterization of polymer degradation based on melt mass flow rate and glass transition temperature as a function of material composition and screw speed
- Fig. 3 : Condensate yield as a function of material composi-tion and screw speed
- Fig. 4 : Composition of the condensates depending on the input materialsEn ligne : https://drive.google.com/file/d/1UyWGZNryR3e0e1kj_8XOAHTRMYqDmYyF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34828
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 9 (2020) . - p. 40-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22367 - Périodique Bibliothèque principale Documentaires Disponible Well filtered is better recycled / Christian Gassen in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 4 (2022)
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Titre : Well filtered is better recycled : Efficient filtration and cake washing for improved chemical recycling of PET Type de document : texte imprimé Auteurs : Christian Gassen, Auteur Année de publication : 2022 Article en page(s) : p. 16-18 Langues : Anglais (eng) Catégories : Compoundage
Filtres
Matières plastiques -- Recyclage
Nettoyage
Polyéthylène téréphtalate
Recyclage chimique
SolvolyseIndex. décimale : 668.4 Plastiques, vinyles Résumé : Chemical recycling processes permit treatment of plastic waste – also if highly contaminated. The results are recyclates that have the same quality as virgin material. For example, newly developed processes enable used PET plastics to be returned to the material cycle. Hereby, the end products‘ quality is determined by the recycled material‘s purity. This can be significantly increased by means of efficient filtration and cake washing. Note de contenu : - chemical recycling : Products achieve the quality of virgin material
- High monomer purity
- MUlti-stage counterflow washing with lower consumption of resources
- Solvolysis of PET
- Rotary pressure filter for chemical recycling
- High monomer yield with suitable solids/Liquids separationEn ligne : https://drive.google.com/file/d/1zTZJd8C78jUkqsTFGggXE1uU3I_JF1Pa/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37957
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 4 (2022) . - p. 16-18[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23406 - Périodique Bibliothèque principale Documentaires Disponible What is happening in chemical recycling ? / Lars Krause in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 3 (2021)
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Titre : What is happening in chemical recycling ? : Overview of the various processes and suppliers Type de document : texte imprimé Auteurs : Lars Krause, Auteur ; Michael Carus, Auteur Année de publication : 2021 Article en page(s) : p. 42-45 Langues : Anglais (eng) Catégories : Matières plastiques -- Recyclage
Recyclage chimiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : For a long time, chemical recycling was considered an unfinished addition to established material processes. In the meantime, however, some technologies are making the leap into large-scale industrial use: an overview of the various processes and providers. Note de contenu : - Waiting for a start signal
- The available technologies
- Dissolution : selective separation of thermoplastics
- Depolymerization : breakdown and resynthesis
- Conversion : Raw materials for plastics, chemicals and fuels
- Fig. 1 : Overview of the different methods for chemical recycling of plastic waste: different processes are available for all approaches
- Fig. 2 : Different recycling processes exist for the treatment of plastics. The products of the processes can be used as raw materials at different levels of plastics production
- Table 1 : Summary of available recycling technologies and their inputs: bio-based polymers are marked in bold, bio-based drop-in polymers are not specifically highlighted. They can be treated in the same way as their fossil counterparts. Polymers in brackets indicate certain limitations for the process
- Table 2 : Number of chemical recycling technology providers by country: especially in North America and Europe, many companies are working on chemical recyclingEn ligne : https://drive.google.com/file/d/1GMWF3c7ZU1l1PfjxJ-7jIjCta3XHTbVi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35540
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 3 (2021) . - p. 42-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22639 - Périodique Bibliothèque principale Documentaires Disponible Yarns from chemically recycled textile waste and biopolymers modified through reactive extrusion in CHEMICAL FIBERS INTERNATIONAL, Vol. 70, N° 4 (12/2020)
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Titre : Yarns from chemically recycled textile waste and biopolymers modified through reactive extrusion Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 125-126 Langues : Anglais (eng) Catégories : Biopolymères
Dépolymérisation
Extrusion réactive
Polyéthylène téréphtalate
Production
Recyclage chimique
Textiles et tissus -- RecyclageIndex. décimale : 677 Textiles Note de contenu : - Employing polymers from natural sources
- Chemical recycling
- Fig. 1 : Traditional paradigm model for textile sector
- Fig. 2 : Global production, use, and fate of polymer resins, synthetic fibers and additives from 1950-2015 (values in million metric tons)
- Fig. 3 : General outline of Biorex project
- Fig. 4 : PET depolymerization-polymerization reaction schemeEn ligne : https://drive.google.com/file/d/1087cJbcwhfWho2Qt6Ihc9N2B1aw3kCQR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35018
in CHEMICAL FIBERS INTERNATIONAL > Vol. 70, N° 4 (12/2020) . - p. 125-126[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22511 - Périodique Bibliothèque principale Documentaires Disponible 22474 - Périodique Bibliothèque principale Documentaires Disponible