INEOS STYROLUTION
Final results of chemical recycling project on depolymerising PS back to styrene
Ineos Styrolution (Frankfurt / Germany; www.ineos-styrolution.com) has reported the final results of its “ResolVe” chemical recycling project, funded by the German Federal Ministry of Education and Research (BMBF), to convert polystyrene back to its monomer (see Plasteurope.com of 07.11.2019). The styrenics producer said the project has proved that depolymerisation is a “very appropriate” recycling solution for PS in combination with distillation of the output for further polymerisation. The research showed that up to 75% of the output can be fed into the purification step and subsequently back into the production of new PS.

Twin-screw extruder for depolymerisation and attached condensation setup (Photo: ResolVe)
A key part of the project was the investigation of waste composition and the effect on styrene yield, which was done in partnership with the German Institut für Kunststoffverarbeitung (IKV, Aachen; www.ikv-aachen.de), the Institute for Processing and Recycling (I.A.R, Aachen; www.iar.rwth-aachen.de) and Neue Materialien Bayreuth (NMB, Bayreuth / Germany; www.nmbgmbh.de).

Having identified the best process conditions, such as temperature, mass flow rate, residence time and vacuum pressure, IKV transferred these parameters to a larger scale and successfully depolymerised PS to styrene oil. The feasibility of other processes including steam cracking of process residues were assessed together with Ineos Olefins & Polymers as project partner.

While the chemical recycling process is sensitive to PET contamination – disclosed by Ineos Styrolution last September – the research has demonstrated that a stable depolymerisation process is possible with a broad variety of feedstock material, with lightweight packaging and EPS waste proving to be the most suitable. The process can also tolerate polyolefin contamination, removing legacy flame retardant hexabromocyclododecane (HBCD) to a large extent, although traces containing bromine remained.

Furthermore, Ineos Styrolution says a life cycle assessment of the technology revealed that producing PS with previously depolymerised material requires less energy and produces 37% less CO2 (at laboratory scale) than the conventional fossil-based route.
01.07.2020 Plasteurope.com [245434-0]
Published on 01.07.2020

© 2001-2020 Plasteurope.com  |  Imprint  |  Privacy

Plasteurope.com is a business information platform for the European plastics industry. It is part of KI Kunststoff Information and PIE Plastics Information Europe, one of the leading content providers for the European plastics industry. We offer daily updated business news and reports, in-depth market analysis, polymer prices and other services for the international plastics industry, including a suppliers guide, career opportunities, a trade name directory and videos.

News | Polymer Prices | Material Databases | Plastics Exchange | Suppliers Guide | Jobs | Trade Names | Videos | Associations & Institutions | Register | Advertising

PIE – Plastics Information Europe | KI – Kunststoff Information | KunststoffWeb | Plastics Material Exchange | Polyglobe | K-Profi
© 2001-2020 by Plasteurope.com, Bad Homburg
Date of print: 05.07.2020 20:49:54   (Ref: 227306656)
Text and images are subject to copyright and other laws for protection of intellectual property.
Any duplication or distribution in any media as a whole or in parts requires prior written approval by Plasteurope. URL: http://www.plasteurope.com/news/detail.asp