Hydrogenative Depolymerization of End‐of‐Life Poly(bisphenol A carbonate) with in situ Generated Ruthenium Catalysts

One essential aspect to create a circular economy can be the valorisation of plastic waste to create valuable chemicals. The depolymerization, the converse reaction of the polymer built‐up process, can be promising to reach the targets of a circular economy. Depolymerizations can provide monomers, w...

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Bibliographic Details
Published in:ChemistrySelect (Weinheim) 2020-04, Vol.5 (14), p.4231-4234
Main Authors: Alberti, Christoph, Kessler, Jannik, Eckelt, Sarah, Hofmann, Melanie, Kindler, Tim‐Oliver, Santangelo, Nicolo, Fedorenko, Elena, Enthaler, Stephan
Format: Article
Language:English
Subjects:
catalysis
depolymerization
green chemistry
polymers
recycling
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Summary:One essential aspect to create a circular economy can be the valorisation of plastic waste to create valuable chemicals. The depolymerization, the converse reaction of the polymer built‐up process, can be promising to reach the targets of a circular economy. Depolymerizations can provide monomers, which are polymerized in a subsequent process. We have explored the hydrogenative depolymerization of end‐of‐life poly(bisphenol A carbonate) (EoL‐PBPAC). Applying an in situ generated catalyst derived from the precursors [RuClH(CO)(PPh3)3] and 2‐(di‐iso‐propylphosphino)ethylamine EoL‐PBPAC, e. g. a DVD, was reduced to methanol and bisphenol A in good to excellent yields. For closing the cycle bisphenol A may be reprocessed as monomer for the reproduction of new PBPAC. The second depolymerization product methanol may be submitted to the hydrogen economy for release of hydrogen and in consequence energy generation. The depolymerization of end‐of‐life poly(bisphenol A carbonate) is described. The transformation is based on the hydrogenation of the carbonate function in the presence of an in situ generated Ruthenium catalyst to produce bisphenol A a suitable precursor for the synthesis of new poly(bisphenol A carbonate) and methanol a useful chemical for the hydrogen economy.
ISSN:2365-6549
2365-6549
DOI:10.1002/slct.202000626