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Chemical Recycling of Poly(ethylene terephthalate) (PET) by Hydrolysis and Glycolysis

Carta, Daniela, Cao, G and D’Angeli, C (2001) Chemical Recycling of Poly(ethylene terephthalate) (PET) by Hydrolysis and Glycolysis Environmental Science and Pollution Research, 10 (6). pp. 390-394.

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In this paper we review an interesting method of PET recycling, i.e. chemical recycling; it is based on the concept of depolymerizing the condensation polymer through solvolytic chain cleavage into low molecular products which can be purified and reused as raw materials for the production of high-quality chemical products. In this work our attention is confined to the hydrolysis (neutral, acid and alkaline) and glycolysis processes of PET chemical recycling; operating conditions and mechanism of each method are reported and described. The neutral hydrolysis has an auto accelerating character; two kinetic models have been proposed: an half-order and a second order kinetic model. The acid hydrolysis could be explained by a modified shrinking core model under chemical reaction control and the alkaline hydrolysis by a first-order model with respect to hydroxide ion concentration. To describe glycolysis, two different kinetic models have been proposed where EG can act or not as internal catalyst. Further experimental and theoretical investigations are required to shed light on the promising processes of PET chemical recycling reviewed in this work.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
Cao, G
D’Angeli, C
Date : 28 November 2001
DOI : 10.1065/espr2001.12.104.8
Uncontrolled Keywords : Ethylene glycol; Glycolysis; Hydrolysis; kinetic investigation; PET [poly(ethylene terephthalate); poly(ethylene terephthalate); recycling; terephthalic acid
Depositing User : Users 8002 not found.
Date Deposited : 04 Sep 2017 10:39
Last Modified : 06 Jul 2019 05:24

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