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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 454756, 6 pages
http://dx.doi.org/10.1155/2014/454756
Research Article

Metal-Containing Ionic Liquids: Highly Effective Catalysts for Degradation of Poly(Ethylene Terephthalate)

1College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China
2Key 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
3Institute of Petrochemistry, Heilongjiang Academy of Sciences, Harbin 150040, China

Received 6 November 2013; Revised 24 December 2013; Accepted 14 March 2014; Published 7 April 2014

Academic Editor: Markku Leskela

Copyright © 2014 Qun Feng Yue et al. 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.

Abstract

Poly(ethylene terephthalate) (PET) waste from local market was depolymerized by ethylene glycol (EG) in the presence of metal-containing ionic liquids, and the qualitative analysis showed that the bis(hydroxyethyl) terephthalate (BHET) was the main product in this process. Compared with other metal-containing ionic liquids, [Bmim]ZnCl3 was considered the best catalyst in the glycolysis of PET. When the reaction temperature was 180°C, the conversion of PET reached 97.9% and the BHET was yielded to 83.3% within 5 h. At the same time, [Bmim]ZnCl3 could be reused for six times without obvious decrease in the yield of BHET. Additional, the effects of waste PET’s source and size were investigated.