Catalytic synthesis of glycerol acetates as an example of utilization of waste glycerol fraction from biodiesel production

摘要

Five com. glycerols of various purity were esterified with AcOH to glycerol mono-, di- or tri-acetates either in a non-catalyzed process or in presence of H2SO4, HCI, H3PO4, p-MeC6H4SO3H and 6 cation exchange resins at 60-118 degrees C for 90-130 min. The concd. H2SO4 and Dowex DR8H+ resin showed the highest acidity and catalytic activity in the process (conversions close to 100% and selectivity to triacetate above 15%). The presence of H2O resulted in a decrease in glycerol conversion.