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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 3    March 2018

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Recycling and depolymerization of waste polyethylene terephthalate bottles by alcohol alkali hydrolysis
SUN Cong-hao(孙琮皓), CHEN Xiang-ping(陈湘萍), ZHUO Qiang(卓强), ZHOU Tao(周涛)

Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources (School of Chemistry and Chemical Engineering), Central South University, Changsha 410083, China

Abstract:In this work, a novel alcohol alkali hydrolysis method was explored for the preparation of terephthalic acid (TPA) from waste polyethylene terephthalate (PET). First, a series of single factor experiments on the depolymerization rate of waste PET bottles and the yield of TPA were conducted to determine the optimized experimental conditions, in terms of reaction time, reaction temperature, dosage of ethylene glycol and sodium bicarbonate, amount of distilled water and stirring rate. Then IR spectra and elemental analysis were carried out for the characterization of obtained product. Under optimal experimental conditions, over 98% PET can be depolymerized into the target product (TPA) and the purity and yield of TPA are over 97% and 94%, respectively. Both the experimental and analytical results support a feasible process for the preparation of TPA from waste PET. It is expected that this alcohol alkali hydrolysis method can promise an effective way for the sustainable recycling of waste PET.

 

Key words: waste polyethylene terephthalate; terephthalic acid; alcohol alkali hydrolysis; ethylene glycol

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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