Aqua-impregnated resins. 2. Separation of polyvalent metal ions on iminodiacetic and polyacrylic resins using bis(2-ethylhexyl) phosphoric and bis(2-ethylhexyl) dithiophosphoric acids as organic eluents
Aqua-impregnated resins. 2. Separation of polyvalent metal ions on iminodiacetic and polyacrylic resins using bis(2-ethylhexyl) phosphoric and bis(2-ethylhexyl) dithiophosphoric acids as organic eluents
复制标题
DOI：
10.1021/ac9902345
复制
发表时间：
1999-11-01
影响因子：
7.4
通讯作者：
Valiente, M
中科院分区：
文献类型：
--
作者：
Oleinikova, M;Muraviev, D;Valiente, M
本文致力于进一步发展新的水浸渍树脂（AIR）技术，报道了通过研究等摩尔Cu ~（2+），Al ~（3+），和Zn 2+在亚氨基二乙酸（IDA）和聚丙烯酸（PAR）树脂上的吸附，（2-乙基己基）磷酸（DEHPA）或双（2-乙基己基）二硫代磷酸（DEHDTPA）作为用于从树脂相中萃取解吸金属离子的选择性洗脱剂。用DEHDTPA和H_2SO_4溶液连续洗脱PAR中的Cu ~（2+）-Al ~（3+）混合物，实现了Cu ~（2+）-Al ~（3+）的定量分离。通过分别用DEHPA或DEHDTPA溶液从IDAR或PAR中萃取洗脱金属混合物，然后用1.1M H-2-SO 4汽提纯化的金属，实现从Al 3+和/或Zn 2+中纯化Cu 2+和从Cu 2+和Zn 2+中纯化Al 3+。所得金属的纯度超过95%，产率> 96%。
This paper dedicated to the further development of the novel aqua-impregnated-resin (AIR) technique reports the results obtained by studying the column separation of equimolar mixtures of Cu2+, Al3+, and Zn2+ on iminodiacetic (IDA) and polyacrylic (PAR) resins by using 0.2 M heptane solutions of either bis(2-ethylhexyl) phosphoric acid (DEHPA) or bis(2-ethyhexyl) dithiophosphoric acid (DEHDTPA) as selective eluents for extractive desorption of metal ions from the resin phase. The quantitative separation of Cu2+-Al3+ mixtures has been achieved by sequential elution of metals from PAR with DEHDTPA and H2SO4 solutions. Purification of Cu2+ from Al3+ and/ or Zn2+ and Al3+ from Cu2+ and Zn2+ is achieved by extractive elution of metal mixtures from IDAR or PAR with DEHPA or DEHDTPA solutions, respectively, followed by stripping of the purified metals with 1.1 M H-2-SO4. The resulting purity of metals obtained with the yield of >96% exceed 95%.