Journal of Polymers and the Environment

, Volume 14, Issue 1, pp 89–101 | Cite as

Chemical Recovery of Useful Chemicals from Polyester (PET) Waste for Resource Conservation: A Survey of State of the Art

  • Cesare Lorenzetti
  • Piero Manaresi
  • Corrado Berti
  • Giancarlo Barbiroli


In this paper we present the main technologies developed over the last decades on chemical recycle of PET from a practical and economical point of view. We show details of plants used to carry out solvolitic reactions emphasising steps of purification, which are sometimes not considered when discussing chemical, recycle but which, in fact, are the key feasibility factors. The recycling or modification of PET to obtain monomers and other useful chemicals as intermediates and additives is carefully considered.


PET polyesters chemical recycle depolymerisation DMT Therephthalic acid 



1,2-propylene glycol




diethylene glycol


Dimethyl therephthalate


Ethylene glycol


Maleic anhydride


Poly(ethylene therephthalate)


Post consumer Recycled Poly(ethylene therephthalate) (colour separated and washed)


Therephthalic acid


Dipropylene glycol


Bis hydroxy ethyl terephthalate


Bis hydroxy butyl terephthalate


High density polyethylene


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Cesare Lorenzetti
    • 1
  • Piero Manaresi
    • 1
  • Corrado Berti
    • 2
  • Giancarlo Barbiroli
    • 1
  1. 1.Dipartimento di Discipline Economico Aziendali, Area Tecnologia e Valorizzazione delle RisorseUniversità di BolognaBolognaItaly
  2. 2.Dipartimento di Chimica Applicata e Scienza dei MaterialiUniversità di BolognaBolognaItaly

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