PRODUCTION OF TEREPHTHALIC ACID DIESTER AND ITS COMPOSITION

PROBLEM TO BE SOLVED: To recycle a waste polyethylene terephthalate into a resource and to obtain an ester oil comprising a terephthalic acid diester useful as a material for a lubricating oil and a plasticizer having excellent utility as a main component by transesterifying a polyethylene terephtha...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: MIZUI KIMIYA
Format: Patent
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To recycle a waste polyethylene terephthalate into a resource and to obtain an ester oil comprising a terephthalic acid diester useful as a material for a lubricating oil and a plasticizer having excellent utility as a main component by transesterifying a polyethylene terephthalate with an alcohol having a specific boiling point under normal pressure. SOLUTION: A polyethylene terephthalate(PET) is transesterified with a monohydric alcohol (e.g. octanol, ethylene glycol monobutyl ether, etc.), having >=170 deg.C boiling point under normal pressure to give the objective ester oil. The monohydric alcohol in an amount of 2.5 to 8 times molar amount is added to a terephthalic acid unit in the PET. Antimony trioxide may be cited a catalyst. The reaction is carried out at a reflux temperature. The oligomer content of the polyester is preferably