摘要
本文采用p204作为萃取剂，对铬鞣剂生产原料进行萃取除铁，然后用盐酸反萃，盐酸除铁树酯再生盐酸，自来水再生树酯。整个工艺流程主要物料循环使用，除铁效率高，在铁含量0．5～1．2g／L时，经过五级萃取五级反萃，除效率可达90％以上。
P204 （ di（2-ethylhexly）phosphoric acid ） is introduced to remove Iron from raw material of chrome tanning. P204 is back extracted by HCI, HCI is recycled by D390 resin,and D390 resin is recycled by water.When the content of iorn is 0.5-1.2g / L, the extraction efficiency can be more than 90% by 5 stage extraction and 5 stage stripping.
