Chemical Depolymerization Based on PET Waste

Haozhe Zhang; Wenlong Xu; Fansheng Meng; Qiang Zhao; Yingyun Qiao; Yuanyu Tian

doi:10.7536/PC240512

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Prog Chem ›› 2025, Vol. 37 ›› Issue (2) : 226-234. DOI: 10.7536/PC240512

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Chemical Depolymerization Based on PET Waste

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Abstract

Plastic products represented by polyethylene terephthalate (PET) have become an important part of modern life and global economy. In order to solve the resource waste and environmental problems caused by PET waste and to realize high-value recycling of materials, there is an urgent need to explore low-cost green and efficient conversion and recycling methods. Chemical depolymerization can deal with low-value, mixed, and contaminated plastics, recover polymer monomers through different chemical reactions or chemically upgrade and recycle to produce new high value-added products, realizing the closed-loop recycling of plastic waste and high value-added applications, which is a key way to establish a circular polymer economy. This paper reviews the latest research progress of chemical depolymerization process of PET waste, analyzes the problems of chemical depolymerization technology of PET waste, and looks forward to the future development trend of chemical depolymerization process of PET waste.

Contents

1 Introduction

2 Chemical recovery methods

2.1 Hydrolysis

2.2 Alcoholysis

2.3 Ammonolysis and aminolysis

2.4 Supercritical depolymerization

3 Conclusion and outlook

Key words

chemical depolymerization of PET waste / hydrolysis / alcoholysis / ammonolysis and aminolysis / supercritical depolymerization

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Haozhe Zhang , Wenlong Xu , Fansheng Meng , et al . Chemical Depolymerization Based on PET Waste[J]. Progress in Chemistry. 2025, 37(2): 226-234 https://doi.org/10.7536/PC240512

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