Production of structured lipids by lipase-catalyzed acidolysis in supercritical carbon dioxide: Effect on acyl migration

In Hwan Kim, Soon Nam Ko, Sun Mi Lee, Soo Hyun Chung, Hakryul Kim, Ki Teak Lee, Tae Youl Ha

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Structured lipids were synthesized by the acidolysis of corn oil by caprylic acid in supercritical carbon dioxide (SCCO2) with Lipozyme RM IM from Rhizomucor miehei. The effects of pressure and temperature on the reaction were studied. To compare the degrees of acyl migration in the SCCO 2 and solvent-free reaction systems, the effects of reaction time on the degree of acyl migration were also studied. The highest mole percentage incorporation of caprylic acid (62.2 mol%) occurred at 24.13 MPa in SCCO 2. The overall incorporation of caprylic acid in the SCCO2 system remained higher than that in the solventfree system at every temperature tested. This trend was observed more clearly at lower temperatures (35-55°C) than at higher temperatures (65-75°C). Acyl migration with both reaction systems was low, with a negligible difference between them up to 12 h, after which the degree of acyl migration in the solvent-free system increased rapidly with time up to 24 h compared with the SCCO2 system.

Original languageEnglish
Pages (from-to)537-541
Number of pages5
JournalJAOCS, Journal of the American Oil Chemists' Society
Volume81
Issue number6
DOIs
Publication statusPublished - 2004 Jun

Keywords

  • Acidolysis
  • Acyl migration
  • Caprylic acid
  • Corn oil
  • Rhizomucor miehei
  • Structured lipids
  • Supercritical carbon dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry

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