STUDIES ON SELECTIVE ADSORPTION RESINS .10. PREPARATION OF CHELATING RESINS CONTAINING MERCAPTO GROUPS FROM POLY(GLYCIDYL METHACRYLATE) BEADS AND ADSORPTION OF METAL-IONS ON THEM

In the previous investigation, it was found that the macroreticular polymer beads of glycidyl methacrylate are favorable for the preparation of chelating resins. In this study, the introduction of mercapto groups into the macroreticular poly (glycidyl methacrylate) beads was investigated by the following two methods. (1) By the reaction of polymer beads with a dioxane solution of mercaptoacetic acid, favorable chelating resins (RGS-TGA) containing 9~10 wt% sulfur could be prepared. (2) By the reaction of polymer beads with a methanol solution of ammonium thiocyanate, followed by the reaction of these products with ethanolic potassium hydrogensulfide, favorable chelating resins (RGS-KSH) containing 17~18 wt% sulfur were obtained. The chelating resins obtained by the two methods had good resistance against air oxidation and showed the selective adsorption ability for Au3+, Ag+ and Hg2+ in a lower pH region. © 1979, The Chemical Society of Japan. All rights reserved.