| abstract |
A method for producing a crystalline, inorganic ion exchange material having the following composition: x1K2O . x2Na2O . ySiO2 . zMeO, wherein x1, x2, y and z are numerical values satisfying the following relationships: y/(x1 + x2) = 1.0 to 2.1, z/y = 0 to 1.0, x1/x2 = 0.01 to 2.0, and Me stands for Ca and/or Mg, the method including the steps of adding and blending one or more alkali metal compounds, or one or more alkali metal compounds and one or more alkaline earth metal compounds in cullets having a composition of SiO2/Na2O = 1.5 to 4.2, and baking the resulting mixture. |