Results: The synthesized product had the purity of 95% and its structural characteristics were confirmed as
isoascorbyl palmitate by LC-ESI-MS, FT-IR, 1H, and 13C NMR analysis. Results from “one–factor-at-a-time” experiments
indicated that the enzyme load, reaction temperature and D-isoascorbic-to-palmitic acid molar ratio had a
significant effect on the D-isoascorbyl palmitate conversion rate. 95.32% of conversion rate was obtained by using
response surface methodology (RSM) under the the optimized condition: enzyme load of 20% (w/w), reaction
temperature of 53°C and D- isoascorbic-to-palmitic acid molar ratio of 1:4 when the reaction parameters were set
as: acetone 20 mL, 40 g/L of molecular sieves content, 200 rpm speed for 24-h reaction time.