Abstract: A macroporous chelating resin with amidoxime groups attached to the crosslinked copolymer of acrylonitrile-divinylbenzene (AN-DVB) was prepared by Fourier transform suspension polymerization followed by chemical modification. Structure and appearance of the resin were characterized by infrared spectrum and electron microscope scanning microscope. The resin was used for separating gallium from Bayer￠s liquor. The influences of crosslinking degree, diluents in oil phase, the third monomer and oxime reacting conditions on the adsorption properties of resins were studied. The results indicate that the resin has favorable selective adsorption behavior towards gallium from Bayer￠s liquor, as the mass fraction of the DVB increases, the adsorption behavior of the chelating resin first increases then decreases, the adsorption behavior comes to the best when DVB is 8%wt, the adsorption rate of resin comes to 46% and 52% when toluene and aviation gasoline are chosen as diluents in oil phase at 30% and 60%. Addition of small account (2%) of the third monomer methyl methacrylate promotes the adsorption rate of the resin to 57%.

Key words: amidoxime group, chelating resin, gallium, Bayer￠s liquor

摘要： 采用悬浮聚合法先合成出了丙烯腈(AN)-二乙烯基苯(DVB)交联骨架，制备了具有偕胺肟基团的大孔螯合树脂，表征了其结构和形貌，并用于拜耳溶液中镓的吸附. 研究了二乙烯苯含量、油相稀释剂种类及用量、第三单体、胺肟化反应条件对树脂吸附镓的性能的影响. 结果表明，螯合树脂的吸附性能随DVB含量增加先增加后降低，DVB含量为8%(w)时吸附性能最好，选用60%(w)甲苯和30%(w)航油作油相稀释剂，树脂的吸附率最大，分别为46%和52%. 添加少量(2%)第三单体甲基丙烯酸甲酯使树脂吸附率提高到57%.

关键词: 偕胺肟基团, 螯合树脂, 镓, 拜耳溶