含有多甘醇、多甘醇单醚功能基的树脂的合成及其对贵金属离子的吸附性

合成了六种含有乙二醇、多甘醇及多甘醇单醚功能基的树脂。树脂的功能基转化率达93.4—97.5％。树脂2—6对Au(Ⅲ)的吸附率达90—100％,对Pt(Ⅳ)为40—50％,但对共存的Pd(Ⅱ)、Cu~(2+)、Ni(2+)、Cd(2+)等离子甚少吸附。六种树脂的吸金容量在226.3—93.8mg Au(Ⅲ)/g树脂之间。被吸附的金可用3％。硫脲-1N盐酸容液洗脱。洗脱率达95.8％以上。

SYNTHESES OF CROSSLINKED POLYSTYRENE BEADS BEARING POLYETHYLENEGLYCOL AND THEIR MONOETHERS AND STUDIES ON THEIR CHELATING PORPERTIES FORNOBLE METAL IONS

Six kinds of macroporous crosslinked polystyrene beads bearing ethylene glycol, poly-ethyleneglycol and their monoethers have been prepared. These resins are made from chloromethylated polystyrene beads, the glycols and their monoethers. In the optimum conditions, the percentages of conversion of chlorine atom into the ether groups are between 93.4-97.5%. These resins can adsorb gold ion Au(Ⅲ) selectively from aqueous hydrochloric acid solution in the presence of Pd(Ⅱ), Cu2+,Ni2+,Cd2+ ions. The adsorption capacities of these resins are between 226.3-93.8 mg Au(Ⅲ)/g resin. The adsorbed gold ion can be eluted to 95.8% by 3% thiourea-1 N hydrochloric acid solution used as an eluent.