| 摘要 |
<p>A process for increasing the exchange yield in ion exchange processes, in which at least one stored reaction fraction obtained in a previous exchange reaction, a solution of exchanging ions supplied from outside and water are delivered to a washed bed which is filled with water and charged with the ions to be exchanged and, after the discharge from the bed of the water and of a solution obtained as product, the same number of reaction fractions as that previously supplied and having the same volume is collected and stored in order to be subjected to a further exchange reaction in an identical manner and same sequence. The process of the invention is characterized in that a displacement occurring in the direction of flow and relatively to one another of those liquid particles which are delivered simultaneously or in immediate succession to the bed is substantially prevented until the discharge from the container of the bed is reached, and that the co-ion content of the at least one reaction fraction is kept constant by keeping constant the volume of the reaction fraction, of the solution supplied from outside and of the liquids discharged from the system and of the co-ion content of the solution supplied from outside. The invention enables one not only to operate at the highest possible exchange yield but also to obtain waste products which satisfy the conditions prescribed for environmental protection.</p> |
