Abstract
This work describes the possibility to hydrolyze rutin (quercetin-3-O-rutinoside) to quercetin using carbon dioxide (CO2) and water without the addition of acids or enzymes. Eight hours of CO2-intensified hydrolysis of aqueous rutin-solutions were carried out to investigate temperature (373.15K–433.15K) and pressure dependence (4–150bar). Both temperature and CO2-pressure dependence are studied. The parameter combination of 413.15K and 150bar gave a complete (100 %) conversion of rutin to quercetin. Temperature and pressure dependence were modelled. Models achieved correlation coefficients between R2=0.85 and 0.99. Influence of H+ ions was described by implementing the »H+-factor« to explain the hydrolysis effect of CO2-pressure in more detail. The results of this work demonstrate that CO2-intensified hydrolysis is possible at moderate temperatures and pressures.
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