从碘产品中除杂制备精碘的工艺探讨

The Research of Refined Iodine Production from Iodine Products through Impurities Purification

探讨了从磷资源回收的碘产品中除氟去杂的工艺机理,设计正交实验得出了富碘溶液脱氟除砷的最优工艺条件及有效方法:在pH为7左右、铝盐量为50 g/L、钙盐量为5 g/L条件下,脱氟率能达到99%,精碘含I2≥99.5%,Pb、Hg、As杂质元素含量均低于1 mg/kg。

The mechanism of defluorination and impurity removal from iodine products recycled in resource is researched. The suitable technological conditions and effective methods of defluori arsenic removal from iodine-rich solution are gotten through orthogonal experiments. Under the phosphate nation and conditions and the iodine basically reached ≥99.5%.