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Issue 42, 2015
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Non-solvent-based pretreatment of poly(3-hydroxybutyrate) for improved bio-based crotonic acid production

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Abstract

In this study, high purity bio-based crotonic acid was obtained by a non-solvent-based pretreatment of poly(3-hydroxybutyrate), PHB, prior to pyrolysis. PHB was produced by Cupriavidus necator KCTC 2649 utilizing heat-treated oil palm frond juice followed by mild alkaline treatment with 0.05 M NaOH. It was found that NaOH-treated PHB was highly converted to its dehydrated monomer to give bio-based crotonic acid with 89% purity; 16% higher than that produced from chloroform-treated PHB. It is believed that pretreatment of PHB with low concentration NaOH assisted in high thermal conversion of PHB into crotonic acid by producing a crotonyl chain-end and Na-binding carboxyl terminal end, which both accelerate the β-chain scission of PHB into biocrotonic acid. The initial molar mass of PHB also played a role in biocrotonic acid production. Overall, improved biocrotonic acid production with high purity is an advantage for industrial production of crotonic acid from renewable resources.

Graphical abstract: Non-solvent-based pretreatment of poly(3-hydroxybutyrate) for improved bio-based crotonic acid production

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Article information


Submitted
17 Feb 2015
Accepted
30 Mar 2015
First published
30 Mar 2015

RSC Adv., 2015,5, 33546-33553
Article type
Paper
Author version available

Non-solvent-based pretreatment of poly(3-hydroxybutyrate) for improved bio-based crotonic acid production

N. F. S. M. Farid, H. Ariffin, M. R. Z. Mamat, M. A. K. Mohd Zahari and M. A. Hassan, RSC Adv., 2015, 5, 33546 DOI: 10.1039/C5RA03017J

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