2-皮考胺树脂的合成及对金和铂族离子的吸附性

Synthesis of 2-Picolyl Amine Resin and Its Sorption Properties for Gold and Platinum-Group Metal Ions

前文已报道了一些含杂环功能基树脂对贵金属离子的吸附性。本文按下列反应式合成了大孔型2-皮考胺树脂(2-picolyl amine resin):

The functional group capacity of crosslinked macroporous polystyrene resin bearing 2-picolyl amine synthesized under optimum conditions is as high as 3. 40 mmol/g resin. The influences of molar ratio of reagents, reaction temperature and reaction time on the nitrogen content of the resin were investigated. The sorption capacities of the resin for Au(Ⅲ), Ir(Ⅳ),Pt(Ⅳ),Pd(Ⅱ) and Rh (Ⅲ) are 768. 0, 384. 8, 356. 0, 167. 2, and 110. 5 mg/g resin, respectively. The coordination ratio of AuCl7 ; IrCl62- , PtCl62- , PdCl42-; and RHCl63- are 1. 15; 0. 59, 0. 54, 0. 46 and 0. 32, respectively. The distribution coefficients of the resin for Au(Ⅲ) , Rh(Ⅱ) and Ir(Ⅳ) are 1. 1×104, 2. 6 ×103, and 1. 9×103 mol/L, respectively.