Übersetzung für "Resin bed" in Deutsch

These are preferably strongly acidic resin bed ion exchangers.

However, it is also possible to provide two separate resin bed ion exchangers.

However, also with this operation type, the layering of the resin bed is disrupted.

In this fashion the layering of the resin bed is maintained.

The water flows upward through the resin bed.

Hydrochloric acid (HCl) is very efficient and does not cause precipitations in the resin bed.

However, the layering of the resin bed is thereby disrupted which subsequently requires a large expenditure of regeneration agent.

The flow rate was in this case chosen so that the resin bed was converted into a fluidized bed.

For example, this may occur in the regenerating solution feeder line upstream the resin bed or in the brine vessel itself.

The brine serves to regenerate the softener which may be a mixed bed resin in an ion exchanger.

Once a CaSO4 precipitate is formed, it is very difficult to remove from the resin bed.

The resulting eluate is then passed over a second ion exchanger with 100 ml of a mixed bed resin of strongly acid and strongly basic ion exchanger resins (Levatit S 100/RTMDuolite A 101D from Diamond Shamrock) and then again over 100 ml of a strongly acid ion exchanger.

After the loading step the resin bed is washed countercurrently with water until the pH value of the outflowing washing water has decreased from initially >13 to 11-9.

After separation of the ion exchanger, which usually takes place by means of sedimentation or filtration or results by itself when using a resin bed (as is customary, for example, in water preparation), the reaction mixture is freed, to the extent necessary, of non-reacted acrolein.

The processes previously described also have the disadvantage that, even when they are carried out on a merely semitechnical scale, the pressure in the adsorption column already increases to a far too great extent after only a small number of cycles when gallium-containing aluminate solutions of the kind obtained in the production of aluminium oxide by the Bayer process, i.e. aluminate solutions with a relatively high content of organic compounds, are employed, and the capacity of the resin to adsorb gallium decreases to such an extent that the process has to be stopped and, since back-washing of the resin bed only produces an insignificant reduction in pressure and no improvement in the adsorptive capacity of the resin, the resin has to be removed from the column.

It has now been found that a process for the recovery of gallium from aqueous alkaline solutions, in particular aluminate solutions formed in the Bayer process, which can be carried out economically on an industrial scale, is obtained by using a special type of macroporous bead polymer as the carrier material, loading the latter with only a specific limited quantity of Kelex, namely 160 to 190 g of Kelex 100 per liter of (dry) resin and not immediately beginning with the loading step after the elution of the gallium from the resin, but first of all expelling the acid from the resin bed by washing the resin with water, then washing the resin with aqueous sodium hydroxide solution and only then beginning the service cycle once again with the loading step.

An alkaline, gallium-containing aluminate solution from the production of aluminium oxide by the Bayer process is passed downwards through the resin bed at a linear flow rate of 21 m/h.

Consequently, the concentration of a-amino acid rises above that in the initial solution in the particular zone of the resin bed in which this displacement process is taking place.

During the transition from the polyalcohol cycle to the sugar cycle, the polyalcohol with its greater specific gravity, is forced out of the resin bed from top to bottom by the lighter sugar solution.