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Title:Enzymatic fatty ester synthesis
Authors:ID Pečnik, Simona (Author)
ID Knez, Željko (Author)
Files:URL http://dx.doi.org/10.1007/BF02635898
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract: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.
Keywords:chemical engineering, biotechnology, esterification, syntheses, esters, enzymes, lipase, Mucor miehei, reaction kinetics, reaction thermodynamics, 1, 2-isopropylidene-3-oleoyl glycerol
Year of publishing:1992
PID:20.500.12556/DKUM-35103 New window
UDC:66.095.13:577.15
ISSN on article:0003-021X
COBISS.SI-ID:4025092 New window
NUK URN:URN:SI:UM:DK:KIDREIVQ
Publication date in DKUM:06.06.2012
Views:2549
Downloads:100
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
PEČNIK, Simona and KNEZ, Željko, 1992, Enzymatic fatty ester synthesis. Journal of the American Oil Chemists’ Society [online]. 1992. [Accessed 29 April 2025]. Retrieved from: http://dx.doi.org/10.1007/BF02635898
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Record is a part of a journal

Title:Journal of the American Oil Chemists' Society
Shortened title:J. Am. Oil Chem. Soc.
Publisher:American Oil Chemists' Society
ISSN:0003-021X
COBISS.SI-ID:826116 New window

Secondary language

Language:English
Title:Enzymatic fatty ester synthesis.
Abstract:Opisana je sinteza maščobnega estra z imobilizirano lipazo iz Mucor Miehei, ki je 1,3 specifična. 1,2-izopropiliden glicerol smo dobili s kondenzacijo glicerola z acetonom. Z esterifikacijo 1,2-izopropiliden glicerola in oleinove kisline v prisotnosti lipaze iz Mucor Miehei smo proizvedli 1,2-izopropiliden-3-oleil glicerol. Za določitev optimalnih pogojev za proces esterifikacije smo ugotavljali vplive raznih procesnih parametrov (temperature in tlaka) in različnih razmerij encim/substrat. Najvišja presnova oleinove kisline (80%) je bila pri 55 0C in 57,057 bar. Optimalni dodatek lipaze k substratom je bil 0,096 g na gram rakcijske zmesi. Esterifikacija je reverzibilna reakcija drugega reda. Termodinamske lastnosti smo določili pri 55 oC in o,o57 bar. Energija aktiviranja je bila 20,82vkJ/mol, entropija aktivacije -0,26 kJ/(K mol) in prosta energija aktivacije je bila 103,32 kJ/mol.
Keywords:procesna tehnika, biotehnologija, esterifikacija, sinteze, estri, lipaze, encimi, Mucor miehei, kinetika reakcij, termodinamika reakcija, 1, 2-izopropiliden-3-oleil glicerol


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