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Isooctanol alcoholysis of waste polyethylene terephthalate in acidic ionic liquid

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Abstract

The isooctanol alcoholysis of the waste polyethylene terephthalate (PET) to produce dioctyl terephthalate (DOTP) and ethylene glycol (EG) was investigated in the presence of Brönsted–Lewis acidic ionic liquid (IL). It was found that IL (3–sulfonic acid) propyltriethylammonium chloroironinate [HO3S–(CH2)3–NEt3]Cl–FeCl3 (molar fraction of FeCl3, x = 0.67) was an efficient catalyst. The conversion of PET was 100 %, and the yields of DOTP and EG were 97.6 % and 96.6 % respectively under moderate conditions. After easily separated from the product, IL could be reused seven times without obvious decrease in the conversion of PET and yields of DOTP and EG.

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Acknowledgments

This work was financially supported by the Specialized Research Fund for the Doctoral Program of Higher Education (20113719120002), the Science and Technology Research Program for Colleges and Universities of Shandong (J12LD16), and the Science and Technology Development Project of Qingdao (11–2–4–3–3–jch). The authors are grateful for the financial support.

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Authors and Affiliations

  1. College of Chemical Engineering, Qingdao University of Science and Technology, No. 53 Zhengzhou Road, Qingdao, 266042, China

    Shiwei Liu, Lin Zhou, Lu Li, Shitao Yu, Fusheng Liu, Congxia Xie & Zhanqian Song

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  1. Shiwei Liu
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  2. Lin Zhou
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  3. Lu Li
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  4. Shitao Yu
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  5. Fusheng Liu
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Correspondence to Shitao Yu.

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Liu, S., Zhou, L., Li, L. et al. Isooctanol alcoholysis of waste polyethylene terephthalate in acidic ionic liquid. J Polym Res 20, 310 (2013). https://doi.org/10.1007/s10965-013-0310-6

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  • DOI: https://doi.org/10.1007/s10965-013-0310-6

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