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Catalytic Synthesis of Aspirin with Sodium Acetate by Ultrasonic Wave

YUAN Ye;YUE Liang;CHEN Gui;Chemistry and Chemical Engineering,Huaihua College;  
Salicylic acid and acetic anhydride used as raw materials,sodium acetate as catalyst under different conditions for synthesis of aspirin,the optimized conditions were as follows: crystallization time was 2 h,material mole ratio of salicylic acid and facetic anhydride was 1∶2. 5,reaction time was 20 min,reaction temperature was 75 ℃,and the dosage of catalyst was 8% of salicylic acid. Under these conditions,the yield of Aspirin was 88%. This method was litter equipment corrosion and litter environmental pollution than traditional methods,and was an environmentally friendly and efficient way of synthesis of Aspirin.
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