硫酸锌(镉)盐的动态吸附提纯方法研究

硫酸锌和硫酸镉是制备荧光材料的重宴原料之一.实践证明,这些盐类中的重金属杂质Cu、Fe、Co、Ni、Pb、Cr和Mn等的含量,如超过0.1~0.3ppm,将会对荧光材料的发光性能产生严重影响.因此,一般市售的试剂级硫酸锌(镉)只有经过仔细提纯后方可使用.

STUDY OF MOVING ADSORBENT PURIFICATION METHOD OF ZINC(CADMIUM) SULFATE

The moving adsorbent purification method for removing 7 kinds of ion in ZnSO4 or CdSO4 solution was successfully used. The equipment is mainly made of 3 glass tubes. In the first tube, was placed a mixture of 10g activated char, 1g MnO2, a mix of 10g activated char,1g ZnO and 1g dimethylglypxime was in the second and of 10g activated char and lg NaBiO3 in the third.When the solution of ZnSO4or CdSO4 (conc, of ZnSO4 or CdSO4:6%, Ph=5.5-5.8) flows across the three tubes successively, Cu2+ Fe2+, Co2+, Ni2+,Pb2+,Mn2+ and Cr3+ ions in the original solution were adsorbed.This method of purification is very simple, and the final purified solution is stable.The method can be used also for purifing soluble salt solutions of alkali metals and alkali earth metals.