Adsorption process with resin transfer

Claim 1

In the countercurrent process for the treatment of liquids with an ion exchanger the volume of which decreases on charging and increases on regeneration, by charging this ion exchanger in upward flow, the lower part of the ion exchanger mass being in the form of a fluidized bed and the upper part being in the form of a fixed bed, regenerating the charged ion exchanger in downward flow and backwashing in upward flow, the improvement comprising (a) distributing the ion exchanger within the ion exchange filter between 2 or 3 chambers which are separated from each other by trays which are permeable to liquid, and of which chambers adjacent chambers are connected to one another by a pipeline which permits the transfer of the ion exchanger and has a shut-off organ; (b) conveying the ion exchanger into the individual chambers, or removing it from them, within the filter before and/or during the individual phases of operation, via the pipeline which permit transfer of the ion exchanger, in an amount such that during charging, the chamber through which the liquid to be treated flows last is filled to the extent of 80 to 98% by volume relative to the volume of the chamber, with ion exchanger in the form of a fixed bed, and that during regeneration, this chamber through which the liquid flowed last is uniformly filled to the extent of 80 to 100% by volume, relative to the chamber volume, with ion exchanger and that, during backwashing, the backwashing space in the chamber to be backwashed is 30 to 100% by volume, relative to the volume of the ion exchanger in the chamber to be backwashed; and (c) using for transfer of the ion exchanger from one chamber into the other the liquid to be treated during charging, the regeneration agent during regeneration and the backwashing liquid during backwashing.