以马铃薯淀粉为原料合成了马铃薯淀粉醋酸酯 ,研究了其合成工艺条件 .实验表明 :在淀粉浓度为 40 % ,淀粉与醋酸酐的物质的量之比约为 10∶1,反应温度为 30℃ ,反应时间为 1h ,pH值为 8.0～ 8.2的条件下 ,可制得乙酰基含量约为 2 .5 %的淀粉醋酸酯 ,醋酸酐的利用率为 80 % ,可用于食品工业 . Potato starch acetate was synthesized from potato starch, and its synthesis conditions were studied.The experimental results show that the starch to acetic anhydride content ratio is about 10: 1 and the reaction temperature is 30 ℃ when the starch concentration is 40% , The reaction time is 1h, the pH value is 8.0 ~ 8.2, the starch acetate with the acetyl content of about 2.5% can be obtained. The utilization rate of acetic anhydride is 80%, which can be used in the food industry.