| 摘要 |
PURPOSE:To improve selective adsorptivity for gallium, indium, cobalt and nickel or the like by subjecting a metallic scavenger having amidoxime radical to hydrothermal treatment and preparing the metallic scavenger. CONSTITUTION:A metallic scavenger is produced by subjecting the metallic scavenger having amidoxime radical to hydrothermal treatment at 80-150 deg.C. As the metallic scavenger having amidoxime radical, a compd. having amidoxime radical in the molecule is used, and resin or the like which is obtained by allowing hydroxylamine to react with a cyanovinyl-base monomer such as acrylonitrile, alpha-chloroacrylonitrile and vinylidene cyanide and introducing amidoxime radical is used. The metallic scavenger having amidoxime radical and hot water are preferably treated at 80-150 deg.C for about 0.1-24hr. |
