Isolation of C5-sugars from the hemicellulose-rich hydrolyzate of distillers dried grains

Sadakatali S. Gori, Mandapati V Ramakrishnam Raju, Dania A. Fonseca, Jagannadh Satyavolu, Christopher T. Burns, Michael H. Nantz

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

A three-stage process for isolation and separation of C5-sugars in dry form from the hydrolyzate of distillers dried grains (DDG) is described. The salient features include extraction of bis(boronic ester) adducts of xylose and arabinose into toluene on treatment of neutralized hydrolyzate with phenylboronic acid (PBA) and subsequent addition of propylene glycol to the organic phase to induce sugar precipitation for ready collection. The PBA used in the process is largely reclaimed on hydrolysis of the propylene glycol boronic ester formed during the process. A preparative scale example afforded 48% of the xylose content in DDG as a crystalline solid also containing an additional 11% of the arabinose content.

Original languageEnglish (US)
Pages (from-to)2452-2457
Number of pages6
JournalACS Sustainable Chemistry and Engineering
Volume3
Issue number10
DOIs
StatePublished - 2015
Externally publishedYes

Keywords

  • Arabinose
  • Boronate
  • Diol
  • Extraction
  • Precipitation
  • Transesterification
  • Xylose

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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  • Cite this

    Gori, S. S., Raju, M. V. R., Fonseca, D. A., Satyavolu, J., Burns, C. T., & Nantz, M. H. (2015). Isolation of C5-sugars from the hemicellulose-rich hydrolyzate of distillers dried grains. ACS Sustainable Chemistry and Engineering, 3(10), 2452-2457. https://doi.org/10.1021/acssuschemeng.5b00490