Counter-current process for the rapid regeneration of ion exchan

Details Counter-current process for the rapid regeneration of ion exchan Counter-current process for the rapid regeneration of ion exchan

1992-03-18

1994-09-13

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

521 26, C02F 142

Patent

active

053466233

ABSTRACT:
A method of regenerating an ion exchanger which is used to treat a solution introduced to the ion exchanger in a downward changing direction. The ion exchanger contains a non-constrained bed of ion exchange material in the form of ion exchange granules and has a concentration profile through the ion exchange material after solution has been introduced to the ion exchanger in the charging direction. The method of regenerating comprises passing a regenerating solution upwardly through the non-constrained bed of ion exchange material in an intermittent flow manner comprising an alternating up flow of regenerating solution followed by a down flow of liquid in a direction opposite to the up flow. The duration and velocity of the up flow of regenerating solution is sufficient to lift and generate a perceptible mixing of ion exchange materials in approximately the bottom portion of the ion exchange bed, with the down flow being sufficient to seat the bed very rapidly and terminate mixing.

REFERENCES:
patent: 3021276 (1962-02-01), Mast
patent: 4181605 (1980-01-01), Braswell
patent: 4184893 (1980-01-01), Halvorsen et al.
patent: 4202737 (1980-05-01), Shimizu
patent: 4379057 (1983-04-01), Meiser et al.
patent: 4385992 (1983-05-01), Clauer et al.
patent: 5108616 (1992-04-01), Kunz
patent: 5114595 (1992-05-01), Hensley
English translation of French Pat. No. 1,352,176.
English translation of German Pat. No. DE 3528800 A1.

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