Determine DE confirm optimization of acid hydrolysis.The acid hydrolysis conditions were give as follows: acid concentration 6%, solvent media 95% EtOH, temperature 3h.

• 75%25和85%25乙醇介质中反应产物的DE值较相对应的95%25乙醇介质中低，通过正交实验确定了水解适宜的工艺条件，酸解的最佳工艺条件为盐酸6%25、乙醇浓度95%25、时间3h。