In:
Microbial Biotechnology, Wiley, Vol. 10, No. 6 ( 2017-11), p. 1376-1383
Abstract:
Due to the rising global environment protection awareness, recycling strategies that comply with the circular economy principles are needed. Polyesters are among the most used materials in the textile industry; therefore, achieving a complete poly(ethylene terephthalate) ( PET ) hydrolysis in an environmentally friendly way is a current challenge. In this work, a chemo‐enzymatic treatment was developed to recover the PET building blocks, namely terephthalic acid ( TA ) and ethylene glycol. To monitor the monomer and oligomer content in solid samples, a Fourier‐transformed Raman method was successfully developed. A shift of the free carboxylic groups (1632 cm −1 ) of TA into the deprotonated state (1604 and 1398 cm −1 ) was observed and bands at 1728 and 1398 cm −1 were used to assess purity of TA after the chemo‐enzymatic PET hydrolysis. The chemical treatment, performed under neutral conditions (T = 250 °C, P = 40 bar), led to conversion of PET into 85% TA and small oligomers. The latter were hydrolysed in a second step using the Humicola insolens cutinase (HiC) yielding 97% pure TA , therefore comparable with the commercial synthesis‐grade TA (98%).
Type of Medium:
Online Resource
ISSN:
1751-7915
,
1751-7915
DOI:
10.1111/mbt2.2017.10.issue-6
DOI:
10.1111/1751-7915.12734
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2406063-X
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