Production of structured lipids by lipase-catalyzed acidolysis in supercritical carbon dioxide: effect on acyl migration
2004
Kim, I.H. | Ko, S.N. | Lee, S.M. | Chung, S.H. | Kim, H. | Lee, K.T. | Ha, T.Y.
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 SCCO₂ 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 SCCO₂. The overall incorporation of caprylic acid in the SCCO₂ system remained higher than that in the solvent-free 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.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library