Topping Column ? shift tank?什么意思? Topping Column shift tank 在看 甲醇 英文资料时 看到这两个词 怎么理解呢? These light ends include ketones and aldehydes and are removed in the Topping Column which separates them into an overhead vapour stream The refined methanol is stored in shift tank s for analysis before it is pumped to product storage tanks. [ ]查看更多8个回答 . 5人已关注