20.500.12556/DKUM-52376 Enzymatic esterification of glycerol and stearic acid in non-conventional media 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 $SCCO_2$. 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 $ScCO_2$. glycerol-mono-stearate Lipase ionic liquids supercritical $CO_2$ carbon dioxide glicerol-mono-stearat lipaza ionske tekočine superkritični $CO_2$ ogljikov dioksid true false true Angleški jezik Slovenski jezik Znanstveno delo 2015-07-10 17:31:08 2015-07-10 17:31:08 2022-06-01 03:06:06 2021-05-10 03:17:37 2010 0 0 str. 244-249 št. 1 Letn. 57 2010 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1318-0207 664.87.061-987 14086149 14029590 1318-0207 URN:SI:UM:DK:OMECSKQR Acta_Chimica_Slovenica_2010_Csanadi_et_al._Enzymatic_esterification_of_glycerol_and_stearic_acid_in_non-conventional_media.pdf Acta_Chimica_Slovenica_2010_Csanadi_et_al._Enzymatic_esterification_of_glycerol_and_stearic_acid_in_non-conventional_media.pdf 1 0C211EE09C091C7E8C08B43085EF8843 cce9ffcd08e123b89a34055093e131a7bd3b3c381c910a06ec3bef09202e390f 875ab0b8-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=115513 http://acta-arhiv.chem-soc.si/57/57-1-244.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=76936 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0