以硫醚为主链的螯合树脂研究——Ⅲ.含硫氰酸根树脂的合成及吸附性能

Study on the Chelating Resins Containing Polythioether Main Chain Ⅲ.Synthesis and Adsorption Properties of Chelating Resin Bearing Thiocyemate

环硫氯丙烷的均聚物或环硫氯丙烷与环氧氯丙烷的共聚物,在少量二乙烯三胺存在下制得预交联聚合物,将后者与硫氰化钾反应,制得两种侧链带有硫氰酸根的新型螯合树脂。它们对贵金属具有优良的吸附性能和高的吸附选择性。

The chelating resins(CTC, CETC) bearing thiocyemate groups were first synthesized by the reaction of polychloromethylthiirane (PCMT) or copolymer containing chloromethylthiirane and epichlorohydrin(PCMT-ECH) with potassium thioeyemate by using diethylenetriamine as the crosslinking agent. These resins chelate strongly with Ag(I), and Hg(II), moderately with Au(III) Pt(IV) and Pd(II), as well as weakly with Cu(II), Cd(II), Zn(II), Pb(II), Cr(III), Co(II), Bi( III). CTC has excellent adsorption selectivity for Ag(I). The adsorption mechanism of Au(III) adsorbed on CTC resin was studied by XPS.