Enzymatic synthesis of low molecular weight polyols form methylesters of ricinoleic acid
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46504711%3A_____%2F10%3A%230000278" target="_blank" >RIV/46504711:_____/10:#0000278 - isvavai.cz</a>
Výsledek na webu
—
DOI - Digital Object Identifier
—
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Enzymatic synthesis of low molecular weight polyols form methylesters of ricinoleic acid
Popis výsledku v původním jazyce
In this work the catalytic efficiency of immobilized Candida antarctica lipase B (Novozym 435) for the transesterification reaction of methylesters of hydroxyfunctional fatty acids and low molecular weight di- and polyols was studied. The starting raw materials for the preparation of model samples were methylesters of ricinoleic acid and growing centers of 1,3-propanediol, trimethylolpropane and sorbitol. The reaction was catalyzed with 5 and 10 wt. % of the enzyme and carried out at 65°C in bulk and pressure reduced to 250 mbar in order to remove methanol as a side condensation product. The reaction was studied by molecular weight distribution development within 12 h period using gel permeation chromatography. The results showed that Novozyme 435 preferably catalyses condensation of primary hydroxyl groups of low molecular weight di- and polyols while reaction of secondary hydroxyl groups of methylesters of ricinoleic acid is suppressed. The selective catalytic efficiency of Novozyme
Název v anglickém jazyce
Enzymatic synthesis of low molecular weight polyols form methylesters of ricinoleic acid
Popis výsledku anglicky
In this work the catalytic efficiency of immobilized Candida antarctica lipase B (Novozym 435) for the transesterification reaction of methylesters of hydroxyfunctional fatty acids and low molecular weight di- and polyols was studied. The starting raw materials for the preparation of model samples were methylesters of ricinoleic acid and growing centers of 1,3-propanediol, trimethylolpropane and sorbitol. The reaction was catalyzed with 5 and 10 wt. % of the enzyme and carried out at 65°C in bulk and pressure reduced to 250 mbar in order to remove methanol as a side condensation product. The reaction was studied by molecular weight distribution development within 12 h period using gel permeation chromatography. The results showed that Novozyme 435 preferably catalyses condensation of primary hydroxyl groups of low molecular weight di- and polyols while reaction of secondary hydroxyl groups of methylesters of ricinoleic acid is suppressed. The selective catalytic efficiency of Novozyme
Klasifikace
Druh
O - Ostatní výsledky
CEP obor
CC - Organická chemie
OECD FORD obor
—
Návaznosti výsledku
Projekt
<a href="/cs/project/2A-2TP1%2F135" target="_blank" >2A-2TP1/135: *Nové polyfunkční hybridní polymery z obnovitelných a recyklovatelných surovin s možností uplatnění enzymových katalyzátorů a nanočástic.</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2010
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů