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研究了磷酸三丁酯的四氯化碳溶液对镨(Ⅲ)的硫氰络合物萃取的行为,研究了温度、溶液酸度、硫氰酸铵浓度、磷酸三丁酯浓度对镨(Ⅲ)的分配比的影响,于pH4—5,[NH_4SCN]>0.9M,确定被萃取物的组成为Pr(SCN)_3·4TBP。 在同样条件下,对Nd~Ⅲ,Y~Ⅲ的萃取结果表明,Nd~Ⅲ和pr~Ⅲ在不同pH的萃取行为几乎一样,当pH为3.6—4.5时,Y~Ⅲ和Nd~Ⅲ(Pr~Ⅲ)之间的分离因素D_(Nd~Ⅲ)/D_(Y~Ⅲ)=1.55。
The effects of temperature, solution acidity, ammonium thiocyanate concentration and tributyl phosphate concentration on the interaction of praseodymium (Ⅲ) and praseodymium (PH4-5, [NH4SCN]> 0.9M), the composition of the extract was determined to be Pr (SCN) _3.4TBP. Under the same conditions, the extraction results of Nd ~ Ⅲ and Y ~ Ⅲ show that the extraction behavior of Nd ~ Ⅲ and pr ~ Ⅲ is almost the same at different pH. When pH is 3.6-4.5, the extraction efficiencies of Y ~ Ⅲ and Nd ~ Ⅲ Pr ~ Ⅲ) separation factor D_ (Nd ~ Ⅲ) / D_ (Y ~ Ⅲ) = 1.55.