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Paper | Open Access

Depolymerization of PET with ethanol by homogeneous iron catalysts applied for exclusive chemical recycling of cloth waste

Nor Wahida Binti Awanga,b, Muhammad Aidel Bin Ratno Hadiyonob, Mohamed Mehawed Abdellatifa, Kotohiro Nomuraa ( )
Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
Faculty of Applied Sciences, Universiti Teknologi MARA Sarawak Branch, 94300 ota Samarahan, Sarawak, Malaysia
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Abstract

Acid-, base-free depolymerization of poly(ethylene terephthalate) (PET) with ethanol catalyzed by FeCl3, FeBr3 (1.0–5.0 mol%) gave diethyl terephthalate (DET) and ethylene glycol (EG) exclusively (98–99%, 160–180 °C), and FeCl3 showed better catalytic performance in terms of activity. The FeCl3 catalyst enabled exclusive, selective depolymerization of PET from textile waste to afford DET (and recovered cotton waste), strongly suggesting the possibility of chemical recycling of cloth waste by the transesterification in this catalysis.

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Keywords

DepolymerizationPETChemical recyclingTextile waste managementHomogeneous catalyst

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Industrial Chemistry & Materials
Volume 3 Issue 1,
January 2025
Pages 49-56
DOI: 10.1039/d4im00081a

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Awang NWB, Hadiyono MABR, Abdellatif MM, et al. Depolymerization of PET with ethanol by homogeneous iron catalysts applied for exclusive chemical recycling of cloth waste. Industrial Chemistry & Materials, 2025, 3(1): 49-56. https://doi.org/10.1039/d4im00081a

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Web of Science
Received: 29 June 2024
Accepted: 06 August 2024
Published: 06 August 2024
© 2025 The Author(s). Co‐published by the Institute of Process Engineering, Chinese Academy of Sciences and the Royal Society of Chemistry

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.