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International Journal of Polymer Science
Volume 2015 (2015), Article ID 124524, 11 pages
Review Article

Chemical Recycling of PET Wastes with Different Catalysts

1Department of Polymer Engineering, Shiraz Branch, Islamic Azad University, Shiraz 71987 74731, Iran
2Department of Nanobiotechnology, Protein Research Center, Shahid Beheshti University, G. C. Velenjak, Tehran 19839 4716, Iran
3Department of Chemistry, Darab Branch, Islamic Azad University, Darab, Iran
4Young Researchers and Elite Club, Shiraz Branch, Islamic Azad University, Shiraz 71987 74731, Iran

Received 18 June 2015; Revised 15 September 2015; Accepted 16 September 2015

Academic Editor: Yulin Deng

Copyright © 2015 Mohammad Khoonkari 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.


Chemical recycling of polyethylene terephthalate, known as PET, has been the subject of increased interest as a valuable feedstock for different chemical processes. In this work, glycolysis of PET waste granules was carried out using excess ethylene glycol in the presence of different simple chemicals acting as catalysts, which are, namely, categorized in ionic liquids, metal salts, hydrotalcites, and enzymes. From every category, some materials as a sample were used, and the one which is going to bring the best result is noted. The effect of some parameters such as temperature, pressure, amount of sample, material ratio, and stirring rate was investigated. As a result we compared the best of each category with the others and final result is shown.