Solvent-free enzymatic glycerolysis of marine oils |
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Authors: | Bjørnar Myrnes Harald Barstad Ragnar L Olsen Edel O Elvevoll |
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Affiliation: | 1. Norwegian Institute of Fisheries and Aquaculture, Breivika, N-9002, Troms?, Norway
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Abstract: | Marine triglyceride oils (cod liver oil and oils from blubber of harp seal and minke whale) were reacted with glycerol using
lipase as a catalyst at low temperature. A solvent-free batch system with magnetic stirring was used. Solidification of the
reaction mixture occurred, and a mixture of mono-, di-, and triglycerides was obtained in all cases. The recovered glyceride
mixtures were solid at room temperature. The yield of monoglyceride (MG) and the fatty acid profile of the MG fractions were
dependent on oil and the type of lipase used as a catalyst. Of the commercially-available lipases investigated, lipase AK
fromPseudomonas sp. synthesized the highest yield of MG (42–53%) at 5°C. These MG fractions were low in saturated fatty acids (4–11%) and
high in long-chain monounsaturated fatty acids (52–69%). The concentration of n-3 polyunsaturated fatty acids was 12–20%. |
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Keywords: | Glycerolysis lipase marine oils monoglyceride solidification |
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