Comparison of supercritical CO2 and hexane extraction of lipids from sorghum distillers grains

Lijun Wang, Curtis L. Weller, Vicki L. Schlegel, Timothy P. Carr, Susan L. Cuppett

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25 Scopus citations

Abstract

Total yields and compositions of sorghum dried distillers grains with solubles (DDGS) lipids obtained by supercritical CO2 (SC-CO 2) extraction were compared with those obtained by recirculated solvent extraction (RSE) with hexane. The total yield of lipids obtained by SC-CO2 extraction at 27.5 MPa and 70 °C was 150 g lipids/kg DDGS, while the yield obtained by RSE with hexane at 69 °C was only 85 g lipids/kg DDGS. The contents of four high-value compounds, i.e., policosanols, phytosterols, free fatty acids (FFA) and tocols, in the lipids obtained by SC-CO2 extraction were 31.2, 15.6, 155.3 and 0.50 mg/g at 27.5 MPa and 70 °C, compared to 26.6, 9.6, 57.3 and 0.03 mg/g for RSE with hexane at 69 °C. The profiles of phytosterols and FFA in the sorghum DDGS lipids were relatively independent of the extraction methods and operating conditions.

Original languageEnglish (US)
Pages (from-to)567-574
Number of pages8
JournalEuropean Journal of Lipid Science and Technology
Volume109
Issue number6
DOIs
StatePublished - Aug 2 2007

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Keywords

  • Dried distillers grains with solubles
  • Hexane extraction
  • Lipids
  • Nutraceuticals
  • Supercritical CO extraction

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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