After filtration,the filtrate was added with dichlorlmethane and acetone.Azlocillin sodium was crystallized out with 87% yield.

• 加入二氯甲烷与丙酮的混合溶液使阿洛西林钠沉淀结晶析出,该工艺得到的阿洛西林钠重量收率为87%25。