在NH_4SCN-(NH_4)_2SO_4-HCI-环已酮体系中锆铪的萃取研究

EXTRACTION OF ZIRCONIUM AND HAFNIUM IN NH4SCN-(NH4)2SO4-HC1-CYCLOHEXANONE.

摘要: <正> 本工作采用放射性示踪单级萃取法,先以NH_4SCN与(NH_4)_2SO_4-HCl溶液等体积混合成所需的水相,与环已酮预平衡,加放射性示踪剂到一定体积的预平衡水相中,再以等体积预平衡的有机相萃取,分别测定水相与有机相的放射性,得各因素单一变化时的D_(Hf)、D_(Zr),测定D_(Hf)和Hf萃取率随Hf载体量的变化。

Abstract: In a study of the extraction of Zr and Hf with NH4SCN-(NH4)2SO4-HC1 cyclohexanone system, variations of the distribution ratio with the concentrations of NH4SCN, (NH4)2SO4, HC1 and cyclohexanone are investigated. The extracted complex compounds of Hf and Zr are determined to be composed of HfCl(SCN)3·8(CH2)5CO and ZrO (SCN)2·8(CH2)5CO respectively. Optimum separation conditions are: 3M NH4SCN, 1.5M (NH4)2SO4, 1.0M HC1 and 100% (CH2) 5CO.