摘要
聚环硫氯丙烷与各种氨基吡啶在二乙烯三胺存在下反应,合成了3种主链为聚硫醚、侧链带有吡啶基氨基的新型螯合树脂。它们对贵金属具有优良的吸附性能和高的吸附选择性。并通过X射线光电子能谱初步探讨了树脂对金属离子的螯合作用。
Three new chelating resins (PTAP- Ⅰ , PTAP- Ⅱ and PTAP- Ⅲ ) with a polythioether backbone bearing pyridylamino groups are first synthesized by the amination of poly-chloromethylthiirane with various aminopyridine (i. e. 2-aminopyridine, 3-aminopyridine and 4-aminopyridine) by using diethylenetriamine as the crosslinking agent. These resins cheJate strongly with Ag( Ⅰ ), Au(3) and Pd( Ⅱ ), moderately with Pt(Ⅳ), Hg( Ⅱ ) and Cu(Ⅱ ), as well as weakly with Zn( Ⅱ ) and Cd( Ⅱ ), whereas Pb( Ⅱ ) could not be chelated. PTAP resins possess excellent selectivity for noble metal ions. Au(3) or Pd( Ⅱ ) is only adsorbed from the solution of salts including Au( 3 ) or Pd( Ⅱ ), Zn( Ⅱ ), Hg( Ⅱ ) and Cd( Ⅱ ) etc. Ⅰn addition, from the mixed solution of PdCl2 and H2PtCl6 Palladium( Ⅱ ) is adsorbed, but platinum(Ⅳ ) can hardly be adsorbed. The influence of acidity of medium on adsorption efficiency of PTAP for Au( Ⅱ ), Pd( Ⅱ ), Pt(Ⅳ ) is also investigated.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期511-515,共5页
Chemical Journal of Chinese Universities
关键词
螯合树脂
聚环硫氯丙烷
氯基吡啶
Chelating resins, Polychloromethylthiirane, Aminopyridine, Noble metals, X-ray photo- electric spectrometry
