研究了以SnCl2为活化试剂,TOPO从Rh(Ⅲ)-Sn(Ⅱ)-Cl-体系中萃取Rh(Ⅲ)的体系,考察了SnCl2加入量、酸度、萃取剂浓度、料液恒温时间等条件对Rh(Ⅲ)萃取率的影响.在相比为1:1,Sn:Rh=4:l(摩尔比),恒温时间为1 h,酸度为3 mol·L-1盐酸的条件下,一级萃取率可达98%以上,而且分相速度快.用加KClO3的4 mol·L-1盐酸反萃,一级反萃率达95%.
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