Non-Solvent Pretreatment of Poly(3-Hydroxybutyrate) for Improved Bio-Based Crotonic Acid Production
In this study, high purity bio-based crotonic acid was obtained by non-solvent 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 f...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Royal Society of Chemistry
2015
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/8967/1/fkksa-2015-mior-Non-Solvent%20Pretreatment.pdf http://umpir.ump.edu.my/id/eprint/8967/ http://dx.doi.org/10.1039/C5RA03017J |
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| Summary: | In this study, high purity bio-based crotonic acid was obtained by non-solvent 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 crotonyl chain-end and Na-binding carboxyl terminal end, of which both are the accelerator for ß-chain scission of PHB into biocrotonic acid. Initial molar mass of PHB also played a role in biocrotonic acid production. Overall, improved biocrotonic acid production with high purity biocrotonic acid is an advantage for industrial production of crotonic acid from renewable resource. |
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