PROCESS FOR DEPOLYMERIZING POLYETHYLENE TEREPHTHALATE BY GLYCOLYSIS

PROCESS FOR DEPOLYMERIZING POLYETHYLENE TEREPHTHALATE BY GLYCOLYSIS

The present invention relates to a process for depolymerizing a material comprising polyethylene terephthalate (PET) by glycolysis with ethylene glycol (EG), comprising reacting the material comprising PET with EG in the presence of at least one catalyst so as to obtain a glycolized product containi...

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Hauptverfasser: CECCHETTO, Michele, BERTOLLA, Maddalena, DAL MORO, Anacleto, GUERRA, Stefano, MODESTI, Michele
Format: Patent
Sprache:eng ; fre ; ger
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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creator CECCHETTO, Michele
BERTOLLA, Maddalena
DAL MORO, Anacleto
GUERRA, Stefano
MODESTI, Michele
description The present invention relates to a process for depolymerizing a material comprising polyethylene terephthalate (PET) by glycolysis with ethylene glycol (EG), comprising reacting the material comprising PET with EG in the presence of at least one catalyst so as to obtain a glycolized product containing bis (2-hydroxyethyl) terephthalate (BHET) and/or oligomers thereof, wherein said catalyst comprises an acetate salt of a metal chosen from: calcium, magnesium, aluminium and mixtures thereof. The catalyst can be prepared in situ by a reaction between acetic acid and a compound containing the metal.
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
title PROCESS FOR DEPOLYMERIZING POLYETHYLENE TEREPHTHALATE BY GLYCOLYSIS
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