螯合树脂研究 Ⅻ.以聚硫醚为主链的异丙巯基胺树脂的合成及其吸附性能

 由聚环硫氟丙烷与多乙烯多胺反应制得的聚合物(PB)再与环硫丙烷反应,合成了四种以聚硫醚为主链的异丙巯基胺树脂(PBM_1-4)。树脂对Au³⁺、Pd²⁺、Pt⁴⁺、Ag⁺和Hg²⁺等离子具有强的吸附能力,对Cu²⁺次之,对Zn²⁺和Pb²⁺很弱。树脂对贵金属具有高的选择性,能从含Au³⁺、Cr³⁺、Co²⁺、Ni²⁺、Cu²⁺、Mn²⁺、Zn²⁺和Fe³⁺的溶液中定量吸附Au³⁺而不吸附其它离子。

STUDY ON CHELATING RESINS XII.Syntheses and Adsorption Properties of New Chelating Resins of Aminoisopropylmercaptan Type with a Polythioether Backbone

The four new chelating resins of aminoisopropylmercaptan type with a polythioether backbone (PBM₁, PBM₂, PBM₃, PBM₄) were synthesized by the reaction between methylthiirane with various polyethylene polyamine resins (PB₁, PB₂, PB₃, PB₄) obtained from the treatment of polychloromethylthiirane with ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine, respectively. These resirs exhibit high adsorption capacity and selectivity for noble metal ions. From an aqueous solution containing Au³⁺,Cr³⁺,Ni²⁺,Co²⁺,Cu²⁺,Mn²⁺,Zn²⁺,and Fe³⁺ only gold can be quantitatively adsorbed by the resin PBM₄.