Glycolysis of postconsumer polyethylene terephthalate waste

Authors

  • Navnath D. Pingale,

    1. Department of Fibers and Textile Processing Technology, Institute of Chemical Technology (Deemed University), Matunga, Mumbai 400 019, Maharashtra, India
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  • Vikrant S. Palekar,

    1. Department of Fibers and Textile Processing Technology, Institute of Chemical Technology (Deemed University), Matunga, Mumbai 400 019, Maharashtra, India
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  • S. R. Shukla

    Corresponding author
    1. Department of Fibers and Textile Processing Technology, Institute of Chemical Technology (Deemed University), Matunga, Mumbai 400 019, Maharashtra, India
    • Department of Fibers and Textile Processing Technology, Institute of Chemical Technology (Deemed University), Matunga, Mumbai 400 019, Maharashtra, India
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Abstract

Glycolytic depolymerization of polyethylene terephthalate (PET) bottle waste was attempted using ethylene glycol (EG) in the presence of chlorides of zinc, lithium, didymium, magnesium, and iron as catalysts. Virtual monomer bis (2-hydroxyethyl terephthalate) (BHET) was obtained in all cases with nearly 74% yield, the highest yield being achieved with zinc chloride catalyst 0.5% w/w, PET : EG ratio 1 : 14 and 8 h under reflux conditions. The results were comparable to other catalysts like common alkalis, acids, and salts of some earth metals and zeolites used earlier although parameters of glycolysis were observed to vary depending on the catalyst. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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