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Chemical Recycling of a Textile Blend from Polyester and Viscose, Part I: Process Description, Characterization, and Utilization of the Recycled Cellulose
RISE Research Institutes of Sweden, Materials and Production, Polymeric Materials and Composites.
RISE Research Institutes of Sweden, Bioeconomy and Health, Pulp, Paper and Packaging.
RISE Research Institutes of Sweden, Materials and Production, Polymeric Materials and Composites.ORCID iD: 0000-0002-2513-4289
Chalmers University of Technology, Sweden.
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2022 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 14, no 12, article id 7272Article in journal (Refereed) Published
Abstract [en]

Material recycling requires solutions that are technically, as well as economically and ecologically, viable. In this work, the technical feasibility to separate textile blends of viscose and polyester using alkaline hydrolysis is demonstrated. Polyester is depolymerized into the monomer terephthalic acid at high yields, while viscose is recovered in a polymeric form. After the alkaline treatment, the intrinsic viscosity of cellulose is decreased by up to 35%, which means it may not be suitable for conventional fiber-to-fiber recycling; however, it might be attractive in other technologies, such as emerging fiber processes, or as raw material for sugar platforms. Further, we present an upscaled industrial process layout, which is used to pinpoint the areas of the proposed process that require further optimization. The NaOH economy is identified as the key to an economically viable process, and several recommendations are given to decrease the consumption of NaOH. To further enhance the ecological end economic feasibility of the process, an increased hydrolysis rate and integration with a pulp mill are suggested. © 2022 by the authors.

Place, publisher, year, edition, pages
MDPI , 2022. Vol. 14, no 12, article id 7272
Keywords [en]
industrial process layout, polyester, textile blend, textile recycling, viscose, cellulose, feasibility study, hydrolysis, recycling, textile industry
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-59842DOI: 10.3390/su14127272Scopus ID: 2-s2.0-85132547021OAI: oai:DiVA.org:ri-59842DiVA, id: diva2:1685483
Note

Correspondence Address: de la Motte, H.; RISE Research Institutes of Sweden, Argongatan 30, Box 104, Sweden; email: hanna.delamotte@ri.se; Funding details: Södra Skogsägarnas Stiftelse för Forskning, Utveckling och Utbildning, 2019-106; Funding text 1: Funding: This research was funded by Södra Skogsägarnas stiftelse för Forskning, Utveckling och Utbildning, grant number 2019-106.

Available from: 2022-08-03 Created: 2022-08-03 Last updated: 2023-05-25Bibliographically approved

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Bengtsson, JennyBialik, MartaJedvert, Kerstinde la Motte, Hanna

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