PET Recycling – Contributions of Crystallization to Sustainability,Chemie Ingenieur Technik

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PET Recycling – Contributions of Crystallization to Sustainability
Chemie Ingenieur Technik ( IF 1.5 ) Pub Date : 2020-01-16 , DOI: 10.1002/cite.201900085
Claudia Pudack ₁ , Manfred Stepanski ₁ , Peter Fässler ₁

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Polyethylene terephthalate (PET) is one of the most common thermoplastic polymers and its durability has become a major environmental concern. The current public debate on plastic debris also triggered the revision of PET recycling technologies. This Research Article focuses on the chemical recycling of PET by means of methanolysis. The process degrades PET into two main reaction products, dimethyl terephthalate (DMT) and ethylene glycol (EG). Subsequent separation by distillation combined with crystallization removes critical impurities and non‐PET components from co‐polymers, providing monomers of high purity needed for re‐polymerization purposes.

中文翻译：

PET回收–结晶对可持续发展的贡献

聚对苯二甲酸乙二酯（PET）是最常见的热塑性聚合物之一，其耐久性已成为主要的环境问题。当前有关塑料碎片的公开辩论也引发了PET回收技术的修订。这篇研究文章集中于通过甲醇分解的化学回收。该工艺将PET降解为两种主要反应产物，即对苯二甲酸二甲酯（DMT）和乙二醇（EG）。随后通过蒸馏分离和结晶分离，从共聚物中去除了关键杂质和非PET成分，从而提供了用于再聚合目的的高纯度单体。

更新日期：2020-01-16

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