Next Article in Journal
Structure and Morphology Control in Thin Films of Conjugated Polymers for an Improved Charge Transport
Previous Article in Journal
Release of Potassium Ion and Calcium Ion from Phosphorylcholine Group Bearing Hydrogels
Polymers 2013, 5(4), 1258-1271; doi:10.3390/polym5041258
Article

The Glycolysis of Poly(ethylene terephthalate) Waste: Lewis Acidic Ionic Liquids as High Efficient Catalysts

1,2,3
, 3
, 1,*  and 1,2,*
1 College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China 2 Institute of Petrochemistry, Heilongjiang Academy of Sciences, Harbin 150040, China 3 Key Laboratory of Chemical Engineering Process & Technology for High-Efficiency Conversion, College of Heilongjiang Province, School of Chemistry and Material Sciences, Heilongjiang University, Harbin 150080, China
* Authors to whom correspondence should be addressed.
Received: 3 September 2013 / Revised: 14 October 2013 / Accepted: 29 October 2013 / Published: 13 November 2013
View Full-Text   |   Download PDF [318 KB, uploaded 13 November 2013]   |   Browse Figures

Abstract

Poly(ethlyene terephthalate) waste from a local market was depolymerized by ethylene glycol (EG) in the presence of Lewis acidic ionic liquids [Bmim]ZnCl3 and the qualitative analysis showed that bis(hydroxyethyl) terephthalate was the main product. Compared with ionic liquid [Bmim]Cl, the Lewis acidic ionic liquids showed highly catalytic activity in the glycolysis of poly(ethylene terephthalate) PET. Significantly, the conversion of PET and the yield of bis(hydroxyethyl) terephthalate were achieved at 100% and 83.8% with low catalyst ([Bmim]ZnCl3) loading (0.16 wt %). Investigation also showed that the catalytic activity of [Bmim]ZnCl3 was higher than that of [Bmim]MnCl3. Catalyst [Bmim]ZnCl3 can be reused up to five times and 1H-NMR results show that the recovered catalyst is similar to the fresh one. A mechanism of the glycolysis of PET catalyzed by [Bmim]ZnCl3 was proposed.
Keywords: poly(ethlyene terephthalate); glycolysis; Lewis acidic ionic liquid; bis(hydroxyethyl) terephthalate poly(ethlyene terephthalate); glycolysis; Lewis acidic ionic liquid; bis(hydroxyethyl) terephthalate
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Export to BibTeX |
EndNote


MDPI and ACS Style

Yue, Q.F.; Xiao, L.F.; Zhang, M.L.; Bai, X.F. The Glycolysis of Poly(ethylene terephthalate) Waste: Lewis Acidic Ionic Liquids as High Efficient Catalysts. Polymers 2013, 5, 1258-1271.

View more citation formats

Article Metrics

Comments

Citing Articles

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert