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- Title
Kunststoffrecycling: Immer wieder von vorn.
- Authors
Ehrensberger, Christian
- Abstract
Plastic recycling is an important goal in order to transform plastic waste into high-quality plastic again. There are already chemical processes for depolymerization of polymers such as PET, PU, and PC, which can then be polymerized again. An example of successful recycling is PET strapping bands, which can be converted into industrially usable granules with up to 70% recycled content. Mattresses can also be recycled by hydrolyzing the PU foam to produce PU foams and new mattresses. Evonik is currently testing a pilot-scale polyurethane hydrolysis process. Recycling polycarbonate (PC) poses a challenge due to its properties. PC cannot be mixed with other plastics due to its unique position among plastics. Therefore, either mechanical recycling or chemical recycling is used for PC recycling, depending on whether the waste is pure or heterogeneous. The University of Bath proposes a chemical recycling process with a zinc-based catalyst and methanol, while Covestro in Leverkusen is gaining experience in recycling PC into its raw materials. In addition, alternative approaches such as designing plastics with predetermined breaking points and developing recyclable epoxy resins are also being investigated. These recycling processes could be particularly important for expensive plastics such as polycarbonate.
- Subjects
LEVERKUSEN (Germany); CHEMICAL recycling; CHEMICAL processes; WASTE recycling; PLASTIC recycling; RAW materials; UNIVERSITY of Bath; POLYCARBONATES; BIODEGRADABLE plastics; EPOXY resins
- Publication
Nachrichten aus der Chemie, 2024, Vol 72, Issue 6, p36
- ISSN
1439-9598
- Publication type
Article
- DOI
10.1002/nadc.20244140287