| 摘要 |
PURPOSE:To efficiently remove the metal salt in a solution, by contacting an ion exchange resin having a quaternary ammonium group in the molecule thereof and an ion exchange resin having a carboxylic acid group in the molecular thereof with the solution containing the metal salt. CONSTITUTION:An ion exchange resin having a quaternary ammonium group in the molecule thereof and an ion exchange resin having a carboxylic acid group in the molecule thereof are contacted with a solution containing a metal salt to remove the metal salt contained in the solution. As the metal salt, there are alkali metal halide and/or alkaline earth metal halide containing a heavy metal salt. Further, the aforementioned heavy metal salt is a salt of cobalt, manganese, cesium or nickel. In this method, a problem generating SOX or sulfuric acid mist when the ion exchange resins are burnt after use is eliminated. |
