| 摘要 |
Treatment of water for selective and quantitative removal of all cations of the transition elements, with simultaneous adjustment of a definite mole ratio of calcium, magnesium, and the alkali metals, with a cation exchanger which, towards the ions of the I. transition elements, II. alkaline earth metals, III. alkali metals, shows a markedly gradually decreasing affinity from I. to III.; and which cation exchanger is loaded with calcium and magnesium ions in a predetermined mole ratio, or with hydrogen or sodium ions to obtain a water corresponding to the desired type of water in a vessel made of a water-resistant material and having at least one water-permeable wall. |
