| Naslov: | Enzymatic fatty ester synthesis |
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| Avtorji: | ID Pečnik, Simona (Avtor)
ID Knez, Željko (Avtor) |
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| Datoteke: |  http://dx.doi.org/10.1007/BF02635898
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Neznano |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FKKT - Fakulteta za kemijo in kemijsko tehnologijo
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| Opis: | Fatty ester synthesis with immobilized 1,3-specific lipase from Mucor Miehei is described. 1,2-Isopropylidene glycerol was peoduced by condensation of glycerol with acetone was esterified with oleic acid in the presence of a Mucor Miehei lipaze (Lipozyme TM) to obtain 1,2 isopropylidene- 3-oleoyl glycerol. The effects of various process parameters (temperature and pressure)and various ratios (enzyme/substrate) have been investigated to determine optimal conditions for the esterification process. The highest conversion of oleic acid (80% w/w) was obtained at 55 oC and 57.057 bar, while the optimal addition of lipase to substrate was determined to be 0,096 g per gram of reaction mixture. The esterification can be modelled successfully as a reverse second order reaction. Thermodynamic properties of the reaction system at 55 oC and 0.057 bar were also determined. Activation energy was 20.82 kJ/mole, entropy of activation -0,26 kJ/(Kmole) and free energy of activation was 103.32 kJ/mole. |
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| Ključne besede: | chemical engineering, biotechnology, esterification, syntheses, esters, enzymes, lipase, Mucor miehei, reaction kinetics, reaction thermodynamics, 1, 2-isopropylidene-3-oleoyl glycerol |
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| Leto izida: | 1992 |
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| PID: | 20.500.12556/DKUM-35103  |
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| UDK: | 66.095.13:577.15 |
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| COBISS.SI-ID: | 4025092 |
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| ISSN pri članku: | 0003-021X |
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| NUK URN: | URN:SI:UM:DK:KIDREIVQ |
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| Datum objave v DKUM: | 06.06.2012 |
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| Število ogledov: | 2549 |
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| Število prenosov: | 99 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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