研究了以SnCl2为活化试剂用N-正丁基异辛酰胺(BiOA)从Rh-Sn-CI体系中萃取Rh的性能及机制.结果表明:溶液中未添加SnCl2时,Rh几乎不能被萃取,Rh的萃取率随着溶液中CSh/CRh的值增大而增大,当溶液中CSn/CRh摩尔比达到6以上,CHCI浓度为3 mol·L-1时,用1.5 mol·L-1 TBP-正辛烷体系萃取Rh,经过3min的萃取平衡,Rh的萃取率可达到99%.BiOA和TBP对Rh有协同萃取效应,研究表明萃取反应是以酸性离子缔合机制进行.
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