逐级逆流漂洗在尼泊金甲酯生产中的应用

摘要

将逐级逆流漂洗工艺运用到对羟基苯甲酸甲酯的生产中，在考虑到各单元操作对生产的影响以及原料回收的同时，实现了废水零排放，有效的保护了环境并降低了生产成本，产品平均收率提高了3％，产品符合药典标准。%The process waste water of methyl p -hydroxybenzoate production was treated by countercurrent rinsing technique. In considering the influence of operation unit and yields of 3 % and has advantages of reducing production cost, the recovery of raw materials