Polyethylene Terephthalate Deconstruction Catalyzed by a Carbon‐Supported Single‐Site Molybdenum‐Dioxo Complex

Kratish, Yosi; Li, Jiaqi; Liu, Shanfu; Gao, Yanshan; Marks, Tobin J.

doi:10.1002/anie.202007423

Title: Polyethylene Terephthalate Deconstruction Catalyzed by a Carbon‐Supported Single‐Site Molybdenum‐Dioxo Complex

Journal Article · Tue Sep 15 00:00:00 EDT 2020 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.202007423· OSTI ID:1786075

Kratish, Yosi ^[1]; Li, Jiaqi ^[1]; Liu, Shanfu ^[1]; Gao, Yanshan ^[1];

^[1]

Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208-3113 USA

Abstract Polyethylene terephthalate (PET) is selectively depolymerized by a carbon‐supported single‐site molybdenum‐dioxo catalyst to terephthalic acid (PTA) and ethylene. The solventless reactions are most efficient under 1 atmosphere of H ₂ . The catalyst exhibits high stability and can be recycled multiple times without loss of activity. Waste beverage bottle PET or a PET + polypropylene (PP) mixture (simulating the bottle + cap) proceeds at 260 °C with complete PET deconstruction and quantitative PTA isolation. Mechanistic studies with a model diester, 1,2‐ethanediol dibenzoate, suggest the reaction proceeds by initial retro‐hydroalkoxylation/β‐C−O scission and subsequent hydrogenolysis of the vinyl benzoate intermediate.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-03ER15457

OSTI ID:: 1786075

Journal Information:: Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Vol. 59 Journal Issue: 45; ISSN 1433-7851

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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