Recovery of terephthalic acid by decomposition of PET in supercritical water

Tadafumi Adschiri, Osamu Sato, Katuhiko Machida

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

The possibility for chemical recycling of PET via the recovery of terephthalic acid from decomposition of PET with supercritical water is investigated. PET decomposes to terephthalic acid and ethylene glycol, which are raw materials for PET, in supercritical water and the yield of terephthalic acid reaches 91% with purity of 97% under the conditions of 673 K, 40 MPa and reaction time of 12.5 min. Reaction temperature influences the decomposition rate of PET. It takes 90 min for 90% terephthalic acid recovery at 573 K. Increasing reaction pressure is effective for suppressing char formation or carbon dioxide production during decomposition.

Original languageEnglish
Pages (from-to)511
Number of pages1
Journalkagaku kogaku ronbunshu
Volume23
Issue number4
DOIs
Publication statusPublished - 1997

Keywords

  • Chemical recycling
  • PET
  • Supercritical water
  • Terephthalic acid

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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