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- Title
Value‐Added Upcycling of PET to 1,4‐Cyclohexanedimethanol by a Hydrogenation/Hydrogenolysis Relay Catalysis.
- Authors
Sun, Zehui; Wang, Kaizhi; Lin, Qiang; Guo, Wendi; Chen, Mugeng; Chen, Chen; Zhang, Chi; Fei, Jiachen; Zhu, Yifeng; Li, Jinbing; Liu, Yongmei; He, Heyong; Cao, Yong
- Abstract
We present an innovative process for directly transforming poly(ethylene terephthalate) (PET), a polymer extensively used in food and beverage packaging, into trans‐isomer‐enriched 1,4‐cyclohexanedimethanol (CHDM), a key ingredient in advanced specialty polymers. Our approach leverages a dual‐catalyst system featuring palladium on reduced graphene oxide (Pd/r‐GO) and oxalate‐gel‐derived copper‐zinc oxide (og‐CuZn), utilizing hydrogenation/hydrogenolysis relay catalysis. This method efficiently transforms PET into polyethylene‐1,4‐cyclohexanedicarboxylate (PECHD), which is then converted into CHDM with an impressive overall yield of 95 % in a two‐stage process. Our process effectively handles various post‐consumer PET plastics, converting them into CHDM with yields between 78 % and 89 % across different substrates. Additionally, we demonstrate the applicability and scalability of this approach through a temperature‐programmed three‐stage relay process on a 10‐gram scale, which results in purified CHDM with an isolated yield of 87 % and a notably higher trans/cis ratio of up to 4.09/1, far exceeding that of commercially available CHDM. This research not only provides a viable route for repurposing PET waste but also enhances the control of selectivity patterns in multistage relay catalysis.
- Subjects
BEVERAGE packaging; FOOD packaging; GRAPHENE oxide; HYDROGENOLYSIS; BIOCHEMICAL substrates
- Publication
Angewandte Chemie, 2024, Vol 136, Issue 37, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202408561