Ionic liquids -catalyzed preparation of methyl acetyl ricinoleate
Methyl acetyl ricinoleate was synthesized by using methyl ricinoleic acid and acetic anhydride as reactants, ionic liquid 1 - ( 3 - sulfonic acid) propyl - pyridinium hydrosulfate as a catalyst. Through single factor experiments and orthogonal test, the optimal conditions were obtained as follows: molar ratio of methyl ricinoleic acid to acetic anhydride 1:1. 25 ,dosage of catalyst 3% (based on the mass of methyl ricinoleic acid) ,temperature 80°C and time 1. 5 h. Under the optimal conditions,the conversion of methyl acetyl ricinoleate reached 97.21%.
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