J. Braz. Chem. Soc. vol.27 número1

Several reaction parameters were evaluated including the type and amount of lipase, alcohol:acyl donor molar ratio, use of different organic solvents and temperature, as well as

(solvent free conditions). Acetalization reaction of hexanal with 2-ethyl-hexanol... entries 4 and 6) that increases in the reaction temperature result in an increase in

Traditional purification of these reaction products by silica gel column chromatography demanded a large amount of solvent and time, besides allowing the irreversible adsorption

After the complete reaction, the mixture was brought to room temperature and was directly filtered through silica gel, using hexane/ethyl acetate (7:3) as solvent and the

To optimize glycerol conversion and 1,2-PDO selectivity, the effect of reaction temperature, hydrogen pressure, reaction time, glycerol concentration, catalyst amount, and

Response surface plots showing the predicted values of yield of isoamyl isovalerate, (a) effect of reaction time and alcohol/acid molar ratio, (b) reaction time and amount

The operational variables were flow rate, temperature, catalyst loading, type of catalyst (Amberlyst-15 and K-10), molar ratio of reactants and solvent used to homogenize

Conditions: sonication time, 15 min; type of extraction solvent in UAE stage and its volume, acetonitrile, 5 mL, respectively; sample amount, 1.00 g; extraction solvent in