Abstract
A selective synthesis of dilauroyl maltose was developed using lipase-catalyzed condensation of lauric acid and maltose in two-solvent mixtures. The characteristics of different solvent combination were tested and it was found that the combination of acetone with n-hexane has a good selectivity for the synthesis of dilauroyl maltose. The highest diester conversion of 69% (i.e. 36.5 g/L of dilauroyl maltose) was obtained under optimal conditions: 25.65 g/L maltose, 60 g/L lauric acid, 60 g/L molecular sieve and 10 g/L lipase at 150 rpm and 50 °C for 72 h in 10 mL of mixed solvent of acetone: n-hexane (60:40, v/v).
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