论文部分内容阅读
研究了 Pd(II)碘络合物在丙醇-硫酸铵双水相萃取体系中的分配行为,在 HCl 介质中,碘化铵存在下,Pd(II)能形成离子缔合物[PdI42-·(PrOH2+)2]从而被萃入丙醇相。获得了最佳萃取条件,结果表明本方法能定量萃取 Pd(II),在最佳萃取条件下,Pd(II)的萃取率可达 99.2%. 合成样的分离结果表明,本方法可应用于从大量基体金属如 Fe2+、Ca2+、Mg2+、Mn2+、Al3+、Pb2+和 Zn2+中分离 Pd(II)。对从废碳钯催化剂中 Pd 的回收也进行了试验,结果与火试金法相符。
The partitioning behavior of Pd (II) iodine complex in propanol-ammonium sulfate aqueous two-phase system was studied. In the presence of ammonium iodide, Pd (II) could form ionic association [PdI42- · (PrOH2 +) 2] to be extracted into the propanol phase. The results show that Pd (II) can be extracted quantitatively by this method and the extraction rate of Pd (II) can reach 99.2% under the best extraction conditions.The separation results of synthetic samples show that the method can be applied to Pd (II) is isolated from a large amount of matrix metals such as Fe2 +, Ca2 +, Mg2 +, Mn2 +, Al3 +, Pb2 + and Zn2 +. The recovery of Pd from spent carbon palladium catalyst was also tested and the results were in agreement with the fire assay.