| 摘要 |
In an ion exchange process wherein an ion exchange bed is successively charged and discharged during an exchange cycle with an ion, here designated as "X" ion, with "Y" being used to designate the replacing ion and "Z" the oppositely charged ion associated with X and Y, by passing aqueous solutions of the ions through the bed, with the flow thereof during charging being in one direction and during discharging in the opposite direction; the improvement with respect to the discharge portion of the cycle starting with the bed charged with X ions and filled with water substantially free of X, Y and Z ions, comprising passing at least four groups of fractions through said bed, as follows:
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