Enzymatic esterification of glycerol and stearic acid in non-conventional media

Zsófia Csanádi (Author), Katalin Bélafi-Bakó (Author), Eszter Szentgyörgyi (Author), László Gubicza (Author), Željko Knez (Author), Maja Leitgeb (Author)

Abstract

Ionic liquids as trihexyl-tetradecyl-phophonium-dicyanamide (Cyphos 105) and cocosalkyl-pentaethoxi-methyl-ammonium-methosulfate (Ammoeng 100) were applied for the esterification of stearic acid and glycerol using Candida antarctica lipase (Novozyme 435). When only ILs were applied as solvents at 1:15 initial substrate molar ratio the conversion was 76 and 78 % in the case of two kinds of ILs, respectively. Mixed the ILs and supercritical $CO_2$ the conversion reached 79 and 86 %. The conversion was found highest in supercritical $CO_2$, reached 90 %. Moreover formation of glycerol-di-stearate is much lower in the case of ILs comparing with $SCCO_2$.

Keywords

glycerol-mono-stearate;Lipase;ionic liquids;supercritical CO2;

Data

Language:	English
Year of publishing:	2010
Typology:	1.01 - Original Scientific Article
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	=Slovenian Chemical Society
UDC:	664.87.061-987
COBISS:	14029590
ISSN:	1318-0207
Views:	907
Downloads:	115
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary abstract:	Ionski tekočini (ILs) triheksil-tetradecil-fofonijev-dicianamid (Cyphos 105) in kokosalkil-pentaetoksi-metil-amonijev-metosulfat (Ammoeng 100) smo uporabili kot topili pri reakciji esterifikacije stearinske kisline in glicerola z lipazo iz Candida antarctice (Novozyme 435). Pri začetni množinski koncentraciji substrata 1:15 in v primeru, ko smo uporabili ILs kot samostojni topili, je bila dosežena presnova 76 in 78 %. Višjo, 90 % presnovo smo dosegli v superkritičnem $CO_2$. V primeru uporabe ILs je nastalo več glicerol distearata kot v primeru uporabe $ScCO_2$.
Secondary keywords:	glicerol-mono-stearat;lipaza;ionske tekočine;superkritični $CO_2$;ogljikov dioksid;
URN:	URN:NBN:SI
Type (COBISS):	Scientific work
Pages:	str. 244-249
Volume:	ǂVol. ǂ57
Issue:	ǂno. ǂ1
Chronology:	2010
ID:	1730375